./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/getNumbers4-2.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_bf07d871-660d-41da-a9e3-d64ffee2829e/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_bf07d871-660d-41da-a9e3-d64ffee2829e/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_bf07d871-660d-41da-a9e3-d64ffee2829e/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_bf07d871-660d-41da-a9e3-d64ffee2829e/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/getNumbers4-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_bf07d871-660d-41da-a9e3-d64ffee2829e/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_bf07d871-660d-41da-a9e3-d64ffee2829e/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 440325a953e10d2173456ab8f8c8fc1313a6b958 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 12:08:01,361 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 12:08:01,363 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 12:08:01,413 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 12:08:01,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 12:08:01,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 12:08:01,417 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 12:08:01,418 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 12:08:01,420 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 12:08:01,421 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 12:08:01,421 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 12:08:01,422 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 12:08:01,423 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 12:08:01,424 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 12:08:01,424 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 12:08:01,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 12:08:01,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 12:08:01,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 12:08:01,428 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 12:08:01,430 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 12:08:01,431 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 12:08:01,432 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 12:08:01,434 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 12:08:01,434 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 12:08:01,437 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 12:08:01,437 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 12:08:01,437 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 12:08:01,438 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 12:08:01,439 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 12:08:01,439 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 12:08:01,440 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 12:08:01,440 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 12:08:01,441 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 12:08:01,441 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 12:08:01,442 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 12:08:01,442 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 12:08:01,443 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 12:08:01,443 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 12:08:01,443 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 12:08:01,444 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 12:08:01,444 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 12:08:01,445 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_bf07d871-660d-41da-a9e3-d64ffee2829e/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 12:08:01,463 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 12:08:01,463 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 12:08:01,464 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 12:08:01,464 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 12:08:01,464 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 12:08:01,464 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 12:08:01,464 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 12:08:01,465 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 12:08:01,465 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 12:08:01,465 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 12:08:01,465 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 12:08:01,465 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 12:08:01,465 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 12:08:01,465 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 12:08:01,465 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 12:08:01,466 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 12:08:01,466 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 12:08:01,466 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 12:08:01,466 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 12:08:01,466 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 12:08:01,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 12:08:01,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 12:08:01,467 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 12:08:01,467 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 12:08:01,467 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 12:08:01,467 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 12:08:01,467 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 12:08:01,467 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 12:08:01,467 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 12:08:01,468 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 12:08:01,468 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 12:08:01,468 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 12:08:01,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 12:08:01,468 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 12:08:01,468 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 12:08:01,468 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 12:08:01,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 12:08:01,469 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 12:08:01,469 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 12:08:01,469 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_bf07d871-660d-41da-a9e3-d64ffee2829e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_bf07d871-660d-41da-a9e3-d64ffee2829e/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 440325a953e10d2173456ab8f8c8fc1313a6b958 [2020-12-09 12:08:01,632 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 12:08:01,648 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 12:08:01,650 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 12:08:01,651 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 12:08:01,652 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 12:08:01,653 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_bf07d871-660d-41da-a9e3-d64ffee2829e/bin/utaipan/../../sv-benchmarks/c/memsafety-ext3/getNumbers4-2.c [2020-12-09 12:08:01,693 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bf07d871-660d-41da-a9e3-d64ffee2829e/bin/utaipan/data/20f16c80e/a757dce1f1cf4f26826bdd0ce4562a87/FLAGe9add1c69 [2020-12-09 12:08:02,054 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 12:08:02,054 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_bf07d871-660d-41da-a9e3-d64ffee2829e/sv-benchmarks/c/memsafety-ext3/getNumbers4-2.c [2020-12-09 12:08:02,059 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bf07d871-660d-41da-a9e3-d64ffee2829e/bin/utaipan/data/20f16c80e/a757dce1f1cf4f26826bdd0ce4562a87/FLAGe9add1c69 [2020-12-09 12:08:02,068 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_bf07d871-660d-41da-a9e3-d64ffee2829e/bin/utaipan/data/20f16c80e/a757dce1f1cf4f26826bdd0ce4562a87 [2020-12-09 12:08:02,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 12:08:02,071 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 12:08:02,072 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 12:08:02,072 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 12:08:02,075 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 12:08:02,075 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:08:02" (1/1) ... [2020-12-09 12:08:02,077 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ada9845 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:08:02, skipping insertion in model container [2020-12-09 12:08:02,077 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:08:02" (1/1) ... [2020-12-09 12:08:02,082 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 12:08:02,094 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 12:08:02,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 12:08:02,230 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 12:08:02,249 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 12:08:02,264 INFO L208 MainTranslator]: Completed translation [2020-12-09 12:08:02,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:08:02 WrapperNode [2020-12-09 12:08:02,265 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 12:08:02,266 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 12:08:02,266 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 12:08:02,266 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 12:08:02,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:08:02" (1/1) ... [2020-12-09 12:08:02,278 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:08:02" (1/1) ... [2020-12-09 12:08:02,293 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 12:08:02,293 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 12:08:02,293 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 12:08:02,293 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 12:08:02,299 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:08:02" (1/1) ... [2020-12-09 12:08:02,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:08:02" (1/1) ... [2020-12-09 12:08:02,301 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:08:02" (1/1) ... [2020-12-09 12:08:02,301 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:08:02" (1/1) ... [2020-12-09 12:08:02,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:08:02" (1/1) ... [2020-12-09 12:08:02,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:08:02" (1/1) ... [2020-12-09 12:08:02,311 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:08:02" (1/1) ... [2020-12-09 12:08:02,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 12:08:02,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 12:08:02,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 12:08:02,313 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 12:08:02,314 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:08:02" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf07d871-660d-41da-a9e3-d64ffee2829e/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 12:08:02,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 12:08:02,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 12:08:02,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 12:08:02,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 12:08:02,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 12:08:02,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 12:08:02,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 12:08:02,762 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 12:08:02,762 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-09 12:08:02,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:08:02 BoogieIcfgContainer [2020-12-09 12:08:02,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 12:08:02,771 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 12:08:02,772 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 12:08:02,774 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 12:08:02,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 12:08:02" (1/3) ... [2020-12-09 12:08:02,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d0ee6de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:08:02, skipping insertion in model container [2020-12-09 12:08:02,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:08:02" (2/3) ... [2020-12-09 12:08:02,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d0ee6de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:08:02, skipping insertion in model container [2020-12-09 12:08:02,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:08:02" (3/3) ... [2020-12-09 12:08:02,777 INFO L111 eAbstractionObserver]: Analyzing ICFG getNumbers4-2.c [2020-12-09 12:08:02,786 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 12:08:02,789 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 17 error locations. [2020-12-09 12:08:02,797 INFO L253 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2020-12-09 12:08:02,811 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 12:08:02,811 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 12:08:02,811 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 12:08:02,811 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 12:08:02,812 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 12:08:02,812 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 12:08:02,812 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 12:08:02,812 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 12:08:02,822 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-12-09 12:08:02,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 12:08:02,827 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:08:02,827 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 12:08:02,827 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:08:02,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:08:02,831 INFO L82 PathProgramCache]: Analyzing trace with hash 145433, now seen corresponding path program 1 times [2020-12-09 12:08:02,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:08:02,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486910796] [2020-12-09 12:08:02,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:08:02,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:08:02,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:08:02,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486910796] [2020-12-09 12:08:02,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:08:02,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 12:08:02,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732692901] [2020-12-09 12:08:02,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 12:08:02,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:08:02,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 12:08:02,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 12:08:02,980 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-12-09 12:08:03,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:08:03,023 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-12-09 12:08:03,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 12:08:03,024 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 12:08:03,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:08:03,029 INFO L225 Difference]: With dead ends: 32 [2020-12-09 12:08:03,030 INFO L226 Difference]: Without dead ends: 31 [2020-12-09 12:08:03,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 12:08:03,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-09 12:08:03,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-09 12:08:03,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 12:08:03,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-12-09 12:08:03,051 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 3 [2020-12-09 12:08:03,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:08:03,052 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-12-09 12:08:03,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 12:08:03,052 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-12-09 12:08:03,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 12:08:03,052 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:08:03,052 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 12:08:03,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 12:08:03,053 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:08:03,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:08:03,053 INFO L82 PathProgramCache]: Analyzing trace with hash 145434, now seen corresponding path program 1 times [2020-12-09 12:08:03,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:08:03,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313550427] [2020-12-09 12:08:03,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:08:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:08:03,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:08:03,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313550427] [2020-12-09 12:08:03,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:08:03,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 12:08:03,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811894188] [2020-12-09 12:08:03,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 12:08:03,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:08:03,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 12:08:03,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 12:08:03,094 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 3 states. [2020-12-09 12:08:03,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:08:03,125 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-12-09 12:08:03,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 12:08:03,125 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 12:08:03,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:08:03,126 INFO L225 Difference]: With dead ends: 33 [2020-12-09 12:08:03,126 INFO L226 Difference]: Without dead ends: 33 [2020-12-09 12:08:03,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 12:08:03,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-09 12:08:03,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-09 12:08:03,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-09 12:08:03,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-12-09 12:08:03,130 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 3 [2020-12-09 12:08:03,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:08:03,130 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-12-09 12:08:03,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 12:08:03,130 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-12-09 12:08:03,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 12:08:03,130 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:08:03,130 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2020-12-09 12:08:03,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 12:08:03,131 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:08:03,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:08:03,131 INFO L82 PathProgramCache]: Analyzing trace with hash 139863302, now seen corresponding path program 1 times [2020-12-09 12:08:03,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:08:03,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826271970] [2020-12-09 12:08:03,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:08:03,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:08:03,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:08:03,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826271970] [2020-12-09 12:08:03,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646105230] [2020-12-09 12:08:03,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf07d871-660d-41da-a9e3-d64ffee2829e/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:08:03,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:08:03,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 12:08:03,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:08:03,270 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_50|], 4=[|v_#valid_66|]} [2020-12-09 12:08:03,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 12:08:03,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 12:08:03,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 12:08:03,313 INFO L348 Elim1Store]: treesize reduction 27, result has 50.9 percent of original size [2020-12-09 12:08:03,314 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2020-12-09 12:08:03,317 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 12:08:03,347 INFO L625 ElimStorePlain]: treesize reduction 10, result has 83.6 percent of original size [2020-12-09 12:08:03,356 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 101 [2020-12-09 12:08:03,363 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 12:08:03,392 INFO L625 ElimStorePlain]: treesize reduction 4, result has 91.3 percent of original size [2020-12-09 12:08:03,405 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-09 12:08:03,405 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:39, output treesize:30 [2020-12-09 12:08:03,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:08:03,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:08:03,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:08:03,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1180205521] [2020-12-09 12:08:03,523 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2020-12-09 12:08:03,523 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 12:08:03,527 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 12:08:03,531 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 12:08:03,531 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 12:08:04,046 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 12:08:04,470 WARN L197 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 101 [2020-12-09 12:08:04,531 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 12:08:04,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 12:08:04,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2020-12-09 12:08:04,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496211639] [2020-12-09 12:08:04,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 12:08:04,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:08:04,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 12:08:04,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-12-09 12:08:04,533 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 8 states. [2020-12-09 12:08:04,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:08:04,641 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2020-12-09 12:08:04,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 12:08:04,642 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2020-12-09 12:08:04,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:08:04,644 INFO L225 Difference]: With dead ends: 53 [2020-12-09 12:08:04,644 INFO L226 Difference]: Without dead ends: 53 [2020-12-09 12:08:04,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-12-09 12:08:04,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-09 12:08:04,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2020-12-09 12:08:04,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-09 12:08:04,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-12-09 12:08:04,648 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 5 [2020-12-09 12:08:04,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:08:04,648 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-12-09 12:08:04,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 12:08:04,648 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-12-09 12:08:04,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 12:08:04,649 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:08:04,649 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2020-12-09 12:08:04,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-09 12:08:04,851 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:08:04,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:08:04,852 INFO L82 PathProgramCache]: Analyzing trace with hash 552607639, now seen corresponding path program 1 times [2020-12-09 12:08:04,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:08:04,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747385569] [2020-12-09 12:08:04,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:08:04,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:08:04,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:08:04,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747385569] [2020-12-09 12:08:04,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864909255] [2020-12-09 12:08:04,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf07d871-660d-41da-a9e3-d64ffee2829e/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 12:08:05,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:08:05,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 12:08:05,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:08:05,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:08:05,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:08:05,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:08:05,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [828346405] [2020-12-09 12:08:05,093 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-12-09 12:08:05,093 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 12:08:05,094 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 12:08:05,094 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 12:08:05,094 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 12:08:05,510 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 12:08:05,815 WARN L197 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 101 [2020-12-09 12:08:06,013 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 57 [2020-12-09 12:08:06,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-09 12:08:06,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4, 4] total 11 [2020-12-09 12:08:06,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355257826] [2020-12-09 12:08:06,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 12:08:06,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:08:06,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 12:08:06,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-12-09 12:08:06,041 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 5 states. [2020-12-09 12:08:06,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:08:06,176 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2020-12-09 12:08:06,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 12:08:06,177 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-09 12:08:06,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:08:06,178 INFO L225 Difference]: With dead ends: 51 [2020-12-09 12:08:06,178 INFO L226 Difference]: Without dead ends: 51 [2020-12-09 12:08:06,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-12-09 12:08:06,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-09 12:08:06,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2020-12-09 12:08:06,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-09 12:08:06,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-12-09 12:08:06,181 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 8 [2020-12-09 12:08:06,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:08:06,181 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-12-09 12:08:06,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 12:08:06,181 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-12-09 12:08:06,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 12:08:06,182 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:08:06,182 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2020-12-09 12:08:06,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-09 12:08:06,384 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:08:06,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:08:06,385 INFO L82 PathProgramCache]: Analyzing trace with hash -49032403, now seen corresponding path program 1 times [2020-12-09 12:08:06,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:08:06,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574537031] [2020-12-09 12:08:06,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:08:06,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:08:06,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:08:06,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574537031] [2020-12-09 12:08:06,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899849722] [2020-12-09 12:08:06,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf07d871-660d-41da-a9e3-d64ffee2829e/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 12:08:06,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:08:06,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 12:08:06,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:08:06,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:08:06,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:08:06,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:08:06,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1556855843] [2020-12-09 12:08:06,521 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 12:08:06,521 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 12:08:06,521 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 12:08:06,522 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 12:08:06,522 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 12:08:06,873 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 12:08:07,041 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 66 [2020-12-09 12:08:07,313 WARN L197 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 101 [2020-12-09 12:08:07,508 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 57 [2020-12-09 12:08:07,718 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 63 [2020-12-09 12:08:07,719 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 12:08:07,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 12:08:07,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2020-12-09 12:08:07,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881133351] [2020-12-09 12:08:07,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 12:08:07,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:08:07,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 12:08:07,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-12-09 12:08:07,720 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 9 states. [2020-12-09 12:08:07,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:08:07,741 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-12-09 12:08:07,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 12:08:07,741 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-12-09 12:08:07,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:08:07,741 INFO L225 Difference]: With dead ends: 45 [2020-12-09 12:08:07,741 INFO L226 Difference]: Without dead ends: 45 [2020-12-09 12:08:07,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-12-09 12:08:07,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-09 12:08:07,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-12-09 12:08:07,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-09 12:08:07,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-12-09 12:08:07,744 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 9 [2020-12-09 12:08:07,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:08:07,745 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-12-09 12:08:07,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 12:08:07,745 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-12-09 12:08:07,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 12:08:07,745 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:08:07,745 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2020-12-09 12:08:07,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-09 12:08:07,947 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:08:07,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:08:07,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1037019594, now seen corresponding path program 2 times [2020-12-09 12:08:07,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:08:07,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083791443] [2020-12-09 12:08:07,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:08:07,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:08:08,022 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:08:08,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083791443] [2020-12-09 12:08:08,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347653956] [2020-12-09 12:08:08,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf07d871-660d-41da-a9e3-d64ffee2829e/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 12:08:08,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 12:08:08,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 12:08:08,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 12:08:08,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:08:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-09 12:08:08,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:08:08,342 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-09 12:08:08,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-12-09 12:08:08,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 11 [2020-12-09 12:08:08,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417617339] [2020-12-09 12:08:08,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 12:08:08,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:08:08,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 12:08:08,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-12-09 12:08:08,349 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 5 states. [2020-12-09 12:08:08,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:08:08,403 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-12-09 12:08:08,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 12:08:08,403 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-09 12:08:08,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:08:08,404 INFO L225 Difference]: With dead ends: 43 [2020-12-09 12:08:08,404 INFO L226 Difference]: Without dead ends: 43 [2020-12-09 12:08:08,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-12-09 12:08:08,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-09 12:08:08,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-09 12:08:08,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-09 12:08:08,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-12-09 12:08:08,407 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 11 [2020-12-09 12:08:08,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:08:08,407 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-12-09 12:08:08,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 12:08:08,407 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-12-09 12:08:08,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 12:08:08,408 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:08:08,408 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2020-12-09 12:08:08,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:08:08,610 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:08:08,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:08:08,611 INFO L82 PathProgramCache]: Analyzing trace with hash -342802211, now seen corresponding path program 2 times [2020-12-09 12:08:08,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:08:08,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509454760] [2020-12-09 12:08:08,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:08:08,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:08:08,696 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:08:08,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509454760] [2020-12-09 12:08:08,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170623696] [2020-12-09 12:08:08,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf07d871-660d-41da-a9e3-d64ffee2829e/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 12:08:08,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-12-09 12:08:08,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 12:08:08,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 12:08:08,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:08:09,514 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-09 12:08:09,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:08:09,529 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-09 12:08:09,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 12:08:09,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [8] total 10 [2020-12-09 12:08:09,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515342170] [2020-12-09 12:08:09,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 12:08:09,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:08:09,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 12:08:09,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-12-09 12:08:09,531 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 4 states. [2020-12-09 12:08:09,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:08:09,561 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-12-09 12:08:09,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 12:08:09,561 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-09 12:08:09,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:08:09,562 INFO L225 Difference]: With dead ends: 42 [2020-12-09 12:08:09,562 INFO L226 Difference]: Without dead ends: 42 [2020-12-09 12:08:09,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 15 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-12-09 12:08:09,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-09 12:08:09,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-09 12:08:09,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-09 12:08:09,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-12-09 12:08:09,564 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 17 [2020-12-09 12:08:09,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:08:09,565 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-12-09 12:08:09,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 12:08:09,565 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-12-09 12:08:09,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 12:08:09,565 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:08:09,565 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2020-12-09 12:08:09,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-12-09 12:08:09,766 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:08:09,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:08:09,767 INFO L82 PathProgramCache]: Analyzing trace with hash -342802210, now seen corresponding path program 1 times [2020-12-09 12:08:09,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:08:09,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147768841] [2020-12-09 12:08:09,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:08:09,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:08:09,957 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:08:09,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147768841] [2020-12-09 12:08:09,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827484600] [2020-12-09 12:08:09,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf07d871-660d-41da-a9e3-d64ffee2829e/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 12:08:10,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:08:10,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 12:08:10,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:08:10,045 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:08:10,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:08:10,080 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:08:10,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1483728093] [2020-12-09 12:08:10,082 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 12:08:10,082 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 12:08:10,082 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 12:08:10,082 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 12:08:10,082 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 12:08:10,409 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 12:08:10,618 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 67 [2020-12-09 12:08:10,897 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 101 [2020-12-09 12:08:11,112 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 57 [2020-12-09 12:08:11,342 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 63 [2020-12-09 12:08:11,343 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 12:08:11,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 12:08:11,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2020-12-09 12:08:11,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929532361] [2020-12-09 12:08:11,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-09 12:08:11,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:08:11,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-09 12:08:11,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2020-12-09 12:08:11,344 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 13 states. [2020-12-09 12:08:11,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:08:11,366 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-12-09 12:08:11,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 12:08:11,366 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-12-09 12:08:11,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:08:11,367 INFO L225 Difference]: With dead ends: 50 [2020-12-09 12:08:11,367 INFO L226 Difference]: Without dead ends: 50 [2020-12-09 12:08:11,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2020-12-09 12:08:11,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-09 12:08:11,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-09 12:08:11,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-09 12:08:11,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-12-09 12:08:11,370 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 17 [2020-12-09 12:08:11,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:08:11,370 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-12-09 12:08:11,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-09 12:08:11,370 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-12-09 12:08:11,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-09 12:08:11,370 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:08:11,370 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1] [2020-12-09 12:08:11,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:08:11,572 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:08:11,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:08:11,573 INFO L82 PathProgramCache]: Analyzing trace with hash 526253710, now seen corresponding path program 2 times [2020-12-09 12:08:11,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:08:11,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996784730] [2020-12-09 12:08:11,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:08:11,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:08:11,627 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 12:08:11,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996784730] [2020-12-09 12:08:11,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:08:11,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 12:08:11,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046420660] [2020-12-09 12:08:11,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 12:08:11,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:08:11,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 12:08:11,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 12:08:11,628 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 4 states. [2020-12-09 12:08:11,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:08:11,655 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-12-09 12:08:11,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 12:08:11,655 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-12-09 12:08:11,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:08:11,656 INFO L225 Difference]: With dead ends: 51 [2020-12-09 12:08:11,656 INFO L226 Difference]: Without dead ends: 51 [2020-12-09 12:08:11,656 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 12:08:11,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-09 12:08:11,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-09 12:08:11,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-09 12:08:11,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-12-09 12:08:11,660 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 25 [2020-12-09 12:08:11,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:08:11,660 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-12-09 12:08:11,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 12:08:11,660 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-12-09 12:08:11,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-09 12:08:11,661 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:08:11,661 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1] [2020-12-09 12:08:11,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2020-12-09 12:08:11,661 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:08:11,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:08:11,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1076246846, now seen corresponding path program 1 times [2020-12-09 12:08:11,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:08:11,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101508341] [2020-12-09 12:08:11,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:08:11,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:08:11,804 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 72 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:08:11,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101508341] [2020-12-09 12:08:11,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911751476] [2020-12-09 12:08:11,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf07d871-660d-41da-a9e3-d64ffee2829e/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 12:08:11,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:08:11,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-09 12:08:11,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:08:12,020 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 90 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:08:12,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:08:12,247 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 90 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:08:12,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1645315796] [2020-12-09 12:08:12,248 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 12:08:12,248 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 12:08:12,249 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 12:08:12,249 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 12:08:12,249 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 12:08:12,699 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 12:08:13,101 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 101 [2020-12-09 12:08:13,312 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-09 12:08:13,508 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 12:08:13,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 12:08:13,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2020-12-09 12:08:13,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236711833] [2020-12-09 12:08:13,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-09 12:08:13,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:08:13,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-09 12:08:13,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=594, Invalid=1476, Unknown=0, NotChecked=0, Total=2070 [2020-12-09 12:08:13,510 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 41 states. [2020-12-09 12:08:13,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:08:13,920 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-12-09 12:08:13,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-09 12:08:13,920 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 27 [2020-12-09 12:08:13,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:08:13,921 INFO L225 Difference]: With dead ends: 64 [2020-12-09 12:08:13,921 INFO L226 Difference]: Without dead ends: 64 [2020-12-09 12:08:13,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1068, Invalid=2472, Unknown=0, NotChecked=0, Total=3540 [2020-12-09 12:08:13,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-09 12:08:13,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2020-12-09 12:08:13,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-09 12:08:13,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2020-12-09 12:08:13,925 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 27 [2020-12-09 12:08:13,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:08:13,925 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2020-12-09 12:08:13,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-09 12:08:13,925 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2020-12-09 12:08:13,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-09 12:08:13,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:08:13,926 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1] [2020-12-09 12:08:14,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-12-09 12:08:14,127 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:08:14,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:08:14,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1076246847, now seen corresponding path program 1 times [2020-12-09 12:08:14,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:08:14,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23762551] [2020-12-09 12:08:14,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:08:14,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:08:14,178 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 12:08:14,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23762551] [2020-12-09 12:08:14,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:08:14,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 12:08:14,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737234068] [2020-12-09 12:08:14,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 12:08:14,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:08:14,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 12:08:14,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 12:08:14,180 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 3 states. [2020-12-09 12:08:14,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:08:14,203 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-12-09 12:08:14,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 12:08:14,203 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-12-09 12:08:14,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:08:14,204 INFO L225 Difference]: With dead ends: 58 [2020-12-09 12:08:14,204 INFO L226 Difference]: Without dead ends: 58 [2020-12-09 12:08:14,204 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 12:08:14,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-09 12:08:14,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-12-09 12:08:14,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-09 12:08:14,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-12-09 12:08:14,206 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 27 [2020-12-09 12:08:14,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:08:14,207 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-12-09 12:08:14,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 12:08:14,207 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-12-09 12:08:14,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-09 12:08:14,207 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:08:14,207 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1] [2020-12-09 12:08:14,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2020-12-09 12:08:14,207 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:08:14,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:08:14,208 INFO L82 PathProgramCache]: Analyzing trace with hash 996086115, now seen corresponding path program 1 times [2020-12-09 12:08:14,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:08:14,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638664301] [2020-12-09 12:08:14,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:08:14,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:08:14,253 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 12:08:14,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638664301] [2020-12-09 12:08:14,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781418460] [2020-12-09 12:08:14,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf07d871-660d-41da-a9e3-d64ffee2829e/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 12:08:14,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:08:14,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 12:08:14,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:08:14,571 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 12:08:14,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:08:14,625 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 12:08:14,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1324484854] [2020-12-09 12:08:14,627 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 12:08:14,627 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 12:08:14,628 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 12:08:14,628 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 12:08:14,628 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 12:08:15,073 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 12:08:15,196 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2020-12-09 12:08:15,488 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 101 [2020-12-09 12:08:15,684 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-09 12:08:15,838 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 12:08:15,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 12:08:15,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2020-12-09 12:08:15,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624014391] [2020-12-09 12:08:15,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-09 12:08:15,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:08:15,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-09 12:08:15,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-12-09 12:08:15,839 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 11 states. [2020-12-09 12:08:15,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:08:15,926 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2020-12-09 12:08:15,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 12:08:15,926 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-12-09 12:08:15,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:08:15,927 INFO L225 Difference]: With dead ends: 59 [2020-12-09 12:08:15,927 INFO L226 Difference]: Without dead ends: 59 [2020-12-09 12:08:15,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-12-09 12:08:15,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-09 12:08:15,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-12-09 12:08:15,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-09 12:08:15,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-12-09 12:08:15,929 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 28 [2020-12-09 12:08:15,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:08:15,929 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-12-09 12:08:15,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-09 12:08:15,929 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-12-09 12:08:15,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-09 12:08:15,930 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:08:15,930 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 4, 4, 1, 1, 1] [2020-12-09 12:08:16,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-12-09 12:08:16,132 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:08:16,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:08:16,133 INFO L82 PathProgramCache]: Analyzing trace with hash -151826313, now seen corresponding path program 2 times [2020-12-09 12:08:16,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:08:16,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877947346] [2020-12-09 12:08:16,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:08:16,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:08:16,328 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 72 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:08:16,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877947346] [2020-12-09 12:08:16,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456272039] [2020-12-09 12:08:16,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf07d871-660d-41da-a9e3-d64ffee2829e/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:08:16,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 12:08:16,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 12:08:16,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 12:08:16,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:08:16,722 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-12-09 12:08:16,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:08:16,934 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-12-09 12:08:16,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-12-09 12:08:16,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [16, 5] total 26 [2020-12-09 12:08:16,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133306725] [2020-12-09 12:08:16,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 12:08:16,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:08:16,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 12:08:16,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2020-12-09 12:08:16,935 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 7 states. [2020-12-09 12:08:17,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:08:17,098 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2020-12-09 12:08:17,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 12:08:17,098 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-12-09 12:08:17,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:08:17,099 INFO L225 Difference]: With dead ends: 58 [2020-12-09 12:08:17,099 INFO L226 Difference]: Without dead ends: 58 [2020-12-09 12:08:17,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2020-12-09 12:08:17,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-09 12:08:17,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-12-09 12:08:17,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-09 12:08:17,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2020-12-09 12:08:17,101 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 36 [2020-12-09 12:08:17,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:08:17,101 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2020-12-09 12:08:17,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 12:08:17,101 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2020-12-09 12:08:17,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-09 12:08:17,102 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:08:17,102 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 1, 1, 1, 1, 1] [2020-12-09 12:08:17,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:08:17,304 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:08:17,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:08:17,305 INFO L82 PathProgramCache]: Analyzing trace with hash -411551633, now seen corresponding path program 1 times [2020-12-09 12:08:17,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:08:17,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759063168] [2020-12-09 12:08:17,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:08:17,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:08:17,369 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 12:08:17,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759063168] [2020-12-09 12:08:17,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015213664] [2020-12-09 12:08:17,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf07d871-660d-41da-a9e3-d64ffee2829e/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 12:08:17,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:08:17,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 12:08:17,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:08:17,443 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 12:08:17,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:08:17,495 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 12:08:17,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [981299634] [2020-12-09 12:08:17,496 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 12:08:17,496 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 12:08:17,496 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 12:08:17,496 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 12:08:17,496 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 12:08:17,944 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 12:08:18,347 WARN L197 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 101 [2020-12-09 12:08:18,527 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-09 12:08:18,847 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 12:08:18,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 12:08:18,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2020-12-09 12:08:18,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012907367] [2020-12-09 12:08:18,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-09 12:08:18,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:08:18,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-09 12:08:18,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-12-09 12:08:18,849 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 13 states. [2020-12-09 12:08:18,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:08:18,897 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2020-12-09 12:08:18,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 12:08:18,897 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-12-09 12:08:18,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:08:18,898 INFO L225 Difference]: With dead ends: 79 [2020-12-09 12:08:18,898 INFO L226 Difference]: Without dead ends: 79 [2020-12-09 12:08:18,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 94 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-12-09 12:08:18,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-09 12:08:18,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2020-12-09 12:08:18,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-09 12:08:18,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2020-12-09 12:08:18,902 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 37 [2020-12-09 12:08:18,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:08:18,902 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2020-12-09 12:08:18,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-09 12:08:18,902 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2020-12-09 12:08:18,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-09 12:08:18,903 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:08:18,903 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 4, 1, 1, 1] [2020-12-09 12:08:19,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:08:19,104 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:08:19,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:08:19,104 INFO L82 PathProgramCache]: Analyzing trace with hash -411648434, now seen corresponding path program 2 times [2020-12-09 12:08:19,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:08:19,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496162444] [2020-12-09 12:08:19,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:08:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:08:19,192 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 12:08:19,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496162444] [2020-12-09 12:08:19,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266996631] [2020-12-09 12:08:19,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf07d871-660d-41da-a9e3-d64ffee2829e/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 12:08:19,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-12-09 12:08:19,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 12:08:19,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 12:08:19,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:08:19,521 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2020-12-09 12:08:19,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:08:19,649 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2020-12-09 12:08:19,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [82865748] [2020-12-09 12:08:19,650 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 12:08:19,650 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 12:08:19,650 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 12:08:19,650 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 12:08:19,650 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 12:08:20,063 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 12:08:20,509 WARN L197 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 101 [2020-12-09 12:08:20,711 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-09 12:08:20,993 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 12:08:20,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 12:08:20,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2020-12-09 12:08:20,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414841930] [2020-12-09 12:08:20,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-09 12:08:20,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:08:20,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-09 12:08:20,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-12-09 12:08:20,994 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 16 states. [2020-12-09 12:08:21,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:08:21,274 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2020-12-09 12:08:21,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-09 12:08:21,275 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-12-09 12:08:21,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:08:21,275 INFO L225 Difference]: With dead ends: 73 [2020-12-09 12:08:21,275 INFO L226 Difference]: Without dead ends: 73 [2020-12-09 12:08:21,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 91 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2020-12-09 12:08:21,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-09 12:08:21,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-12-09 12:08:21,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-09 12:08:21,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2020-12-09 12:08:21,277 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 37 [2020-12-09 12:08:21,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:08:21,277 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2020-12-09 12:08:21,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-09 12:08:21,277 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2020-12-09 12:08:21,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-09 12:08:21,278 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:08:21,278 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2020-12-09 12:08:21,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:08:21,479 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:08:21,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:08:21,480 INFO L82 PathProgramCache]: Analyzing trace with hash 907627535, now seen corresponding path program 2 times [2020-12-09 12:08:21,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:08:21,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62547273] [2020-12-09 12:08:21,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:08:21,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:08:21,533 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-12-09 12:08:21,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62547273] [2020-12-09 12:08:21,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:08:21,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 12:08:21,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314415230] [2020-12-09 12:08:21,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 12:08:21,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:08:21,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 12:08:21,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 12:08:21,534 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 4 states. [2020-12-09 12:08:21,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:08:21,561 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2020-12-09 12:08:21,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 12:08:21,561 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-12-09 12:08:21,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:08:21,561 INFO L225 Difference]: With dead ends: 72 [2020-12-09 12:08:21,561 INFO L226 Difference]: Without dead ends: 72 [2020-12-09 12:08:21,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 12:08:21,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-09 12:08:21,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-12-09 12:08:21,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-09 12:08:21,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-12-09 12:08:21,564 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 55 [2020-12-09 12:08:21,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:08:21,564 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-12-09 12:08:21,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 12:08:21,564 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-12-09 12:08:21,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-09 12:08:21,565 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:08:21,565 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2020-12-09 12:08:21,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298 [2020-12-09 12:08:21,565 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:08:21,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:08:21,566 INFO L82 PathProgramCache]: Analyzing trace with hash 907627536, now seen corresponding path program 1 times [2020-12-09 12:08:21,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:08:21,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075066811] [2020-12-09 12:08:21,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:08:21,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:08:21,756 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 108 proven. 37 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 12:08:21,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075066811] [2020-12-09 12:08:21,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786097993] [2020-12-09 12:08:21,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf07d871-660d-41da-a9e3-d64ffee2829e/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 12:08:21,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:08:21,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-09 12:08:21,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:08:22,551 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 135 proven. 10 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 12:08:22,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:08:23,076 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 12:08:23,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-12-09 12:08:23,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13, 13] total 39 [2020-12-09 12:08:23,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797002012] [2020-12-09 12:08:23,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-09 12:08:23,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:08:23,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-09 12:08:23,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=488, Invalid=1152, Unknown=0, NotChecked=0, Total=1640 [2020-12-09 12:08:23,078 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 15 states. [2020-12-09 12:08:23,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:08:23,161 INFO L93 Difference]: Finished difference Result 87 states and 93 transitions. [2020-12-09 12:08:23,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 12:08:23,161 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2020-12-09 12:08:23,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:08:23,162 INFO L225 Difference]: With dead ends: 87 [2020-12-09 12:08:23,162 INFO L226 Difference]: Without dead ends: 87 [2020-12-09 12:08:23,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=503, Invalid=1219, Unknown=0, NotChecked=0, Total=1722 [2020-12-09 12:08:23,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-09 12:08:23,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 74. [2020-12-09 12:08:23,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-09 12:08:23,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2020-12-09 12:08:23,164 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 55 [2020-12-09 12:08:23,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:08:23,164 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2020-12-09 12:08:23,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-09 12:08:23,164 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2020-12-09 12:08:23,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-09 12:08:23,165 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:08:23,165 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2020-12-09 12:08:23,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2020-12-09 12:08:23,367 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:08:23,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:08:23,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1928317461, now seen corresponding path program 1 times [2020-12-09 12:08:23,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:08:23,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679021961] [2020-12-09 12:08:23,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:08:23,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:08:23,433 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-12-09 12:08:23,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679021961] [2020-12-09 12:08:23,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:08:23,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 12:08:23,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070600826] [2020-12-09 12:08:23,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 12:08:23,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:08:23,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 12:08:23,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 12:08:23,434 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand 3 states. [2020-12-09 12:08:23,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:08:23,450 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2020-12-09 12:08:23,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 12:08:23,450 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-12-09 12:08:23,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:08:23,450 INFO L225 Difference]: With dead ends: 73 [2020-12-09 12:08:23,450 INFO L226 Difference]: Without dead ends: 73 [2020-12-09 12:08:23,451 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 12:08:23,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-09 12:08:23,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-12-09 12:08:23,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-09 12:08:23,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2020-12-09 12:08:23,452 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 56 [2020-12-09 12:08:23,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:08:23,452 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2020-12-09 12:08:23,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 12:08:23,452 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2020-12-09 12:08:23,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-09 12:08:23,453 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:08:23,453 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2020-12-09 12:08:23,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable300 [2020-12-09 12:08:23,454 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:08:23,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:08:23,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1928317460, now seen corresponding path program 1 times [2020-12-09 12:08:23,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:08:23,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853877176] [2020-12-09 12:08:23,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:08:23,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:08:23,490 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-12-09 12:08:23,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853877176] [2020-12-09 12:08:23,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:08:23,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 12:08:23,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341635793] [2020-12-09 12:08:23,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 12:08:23,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:08:23,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 12:08:23,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 12:08:23,491 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand 3 states. [2020-12-09 12:08:23,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:08:23,516 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2020-12-09 12:08:23,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 12:08:23,517 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-12-09 12:08:23,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:08:23,517 INFO L225 Difference]: With dead ends: 74 [2020-12-09 12:08:23,517 INFO L226 Difference]: Without dead ends: 74 [2020-12-09 12:08:23,518 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 12:08:23,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-09 12:08:23,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-12-09 12:08:23,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-09 12:08:23,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-12-09 12:08:23,519 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 56 [2020-12-09 12:08:23,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:08:23,519 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-12-09 12:08:23,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 12:08:23,519 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-12-09 12:08:23,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-09 12:08:23,520 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:08:23,520 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 12:08:23,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable301 [2020-12-09 12:08:23,520 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:08:23,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:08:23,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1982107469, now seen corresponding path program 1 times [2020-12-09 12:08:23,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:08:23,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16665444] [2020-12-09 12:08:23,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:08:23,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:08:23,687 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 108 proven. 39 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 12:08:23,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16665444] [2020-12-09 12:08:23,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598234131] [2020-12-09 12:08:23,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf07d871-660d-41da-a9e3-d64ffee2829e/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 12:08:23,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:08:23,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-09 12:08:23,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:08:24,463 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 135 proven. 12 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 12:08:24,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:08:25,117 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 12:08:25,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1086704814] [2020-12-09 12:08:25,118 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 12:08:25,119 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 12:08:25,119 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 12:08:25,119 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 12:08:25,119 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 12:08:25,749 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 12:08:25,952 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2020-12-09 12:08:26,346 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 101 [2020-12-09 12:08:26,624 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-09 12:08:27,431 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2020-12-09 12:08:27,621 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-12-09 12:08:27,860 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2020-12-09 12:08:27,860 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 12:08:27,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 12:08:27,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2020-12-09 12:08:27,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890507740] [2020-12-09 12:08:27,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-09 12:08:27,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:08:27,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-09 12:08:27,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=607, Invalid=2045, Unknown=0, NotChecked=0, Total=2652 [2020-12-09 12:08:27,862 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 44 states. [2020-12-09 12:08:28,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:08:28,795 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2020-12-09 12:08:28,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-09 12:08:28,795 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 58 [2020-12-09 12:08:28,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:08:28,796 INFO L225 Difference]: With dead ends: 110 [2020-12-09 12:08:28,796 INFO L226 Difference]: Without dead ends: 110 [2020-12-09 12:08:28,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 126 SyntacticMatches, 10 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1907 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1255, Invalid=3575, Unknown=0, NotChecked=0, Total=4830 [2020-12-09 12:08:28,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-09 12:08:28,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-12-09 12:08:28,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-09 12:08:28,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2020-12-09 12:08:28,799 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 58 [2020-12-09 12:08:28,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:08:28,799 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2020-12-09 12:08:28,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-09 12:08:28,799 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2020-12-09 12:08:28,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-09 12:08:28,799 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:08:28,799 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1] [2020-12-09 12:08:29,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2020-12-09 12:08:29,001 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:08:29,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:08:29,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1315789399, now seen corresponding path program 1 times [2020-12-09 12:08:29,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:08:29,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612089751] [2020-12-09 12:08:29,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:08:29,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:08:29,047 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-12-09 12:08:29,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612089751] [2020-12-09 12:08:29,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136089882] [2020-12-09 12:08:29,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf07d871-660d-41da-a9e3-d64ffee2829e/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 12:08:29,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:08:29,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 12:08:29,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:08:29,154 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-12-09 12:08:29,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:08:29,191 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-12-09 12:08:29,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [138687671] [2020-12-09 12:08:29,192 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 12:08:29,192 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 12:08:29,192 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 12:08:29,193 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 12:08:29,193 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 12:08:29,836 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 12:08:30,017 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 79 [2020-12-09 12:08:30,321 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 101 [2020-12-09 12:08:30,506 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-09 12:08:30,945 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2020-12-09 12:08:31,099 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-12-09 12:08:31,283 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2020-12-09 12:08:31,283 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 12:08:31,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 12:08:31,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2020-12-09 12:08:31,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753992342] [2020-12-09 12:08:31,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 12:08:31,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:08:31,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 12:08:31,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-12-09 12:08:31,284 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand 6 states. [2020-12-09 12:08:31,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:08:31,337 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2020-12-09 12:08:31,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 12:08:31,337 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-12-09 12:08:31,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:08:31,338 INFO L225 Difference]: With dead ends: 83 [2020-12-09 12:08:31,338 INFO L226 Difference]: Without dead ends: 83 [2020-12-09 12:08:31,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 155 SyntacticMatches, 11 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-12-09 12:08:31,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-09 12:08:31,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-12-09 12:08:31,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-09 12:08:31,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2020-12-09 12:08:31,339 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 59 [2020-12-09 12:08:31,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:08:31,340 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2020-12-09 12:08:31,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 12:08:31,340 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2020-12-09 12:08:31,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-09 12:08:31,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:08:31,340 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 12:08:31,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:08:31,541 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:08:31,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:08:31,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1486684830, now seen corresponding path program 1 times [2020-12-09 12:08:31,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:08:31,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352962153] [2020-12-09 12:08:31,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:08:31,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:08:31,595 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-12-09 12:08:31,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352962153] [2020-12-09 12:08:31,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723234884] [2020-12-09 12:08:31,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf07d871-660d-41da-a9e3-d64ffee2829e/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 12:08:31,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:08:31,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 12:08:31,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:08:31,697 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-12-09 12:08:31,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:08:31,735 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-12-09 12:08:31,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [733926522] [2020-12-09 12:08:31,736 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-12-09 12:08:31,736 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 12:08:31,737 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 12:08:31,737 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 12:08:31,737 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 12:08:32,357 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 12:08:32,473 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-12-09 12:08:32,759 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 101 [2020-12-09 12:08:32,938 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-09 12:08:33,336 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2020-12-09 12:08:33,486 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-12-09 12:08:33,678 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2020-12-09 12:08:33,688 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 12:08:33,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 12:08:33,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2020-12-09 12:08:33,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928599204] [2020-12-09 12:08:33,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 12:08:33,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:08:33,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 12:08:33,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-12-09 12:08:33,689 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand 9 states. [2020-12-09 12:08:33,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:08:33,723 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2020-12-09 12:08:33,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 12:08:33,723 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 62 [2020-12-09 12:08:33,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:08:33,724 INFO L225 Difference]: With dead ends: 89 [2020-12-09 12:08:33,724 INFO L226 Difference]: Without dead ends: 89 [2020-12-09 12:08:33,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 163 SyntacticMatches, 11 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-12-09 12:08:33,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-09 12:08:33,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2020-12-09 12:08:33,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-09 12:08:33,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2020-12-09 12:08:33,725 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 62 [2020-12-09 12:08:33,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:08:33,726 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2020-12-09 12:08:33,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 12:08:33,726 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2020-12-09 12:08:33,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-09 12:08:33,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:08:33,726 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 5, 4, 4, 1, 1, 1, 1] [2020-12-09 12:08:33,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2020-12-09 12:08:33,928 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:08:33,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:08:33,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1171859024, now seen corresponding path program 2 times [2020-12-09 12:08:33,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:08:33,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306431792] [2020-12-09 12:08:33,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:08:33,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:08:34,216 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 108 proven. 63 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 12:08:34,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306431792] [2020-12-09 12:08:34,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978405268] [2020-12-09 12:08:34,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf07d871-660d-41da-a9e3-d64ffee2829e/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 12:08:34,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 12:08:34,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 12:08:34,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-09 12:08:34,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:08:34,796 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2020-12-09 12:08:34,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:08:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2020-12-09 12:08:35,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1530956522] [2020-12-09 12:08:35,082 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 12:08:35,082 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 12:08:35,082 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 12:08:35,082 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 12:08:35,082 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 12:08:35,718 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 12:08:35,901 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2020-12-09 12:08:36,271 WARN L197 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 101 [2020-12-09 12:08:36,522 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-09 12:08:37,302 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2020-12-09 12:08:37,477 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-12-09 12:08:37,681 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2020-12-09 12:08:37,681 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 12:08:37,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 12:08:37,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 4, 4] total 25 [2020-12-09 12:08:37,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109617026] [2020-12-09 12:08:37,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-09 12:08:37,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:08:37,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-09 12:08:37,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1030, Unknown=0, NotChecked=0, Total=1190 [2020-12-09 12:08:37,683 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand 27 states. [2020-12-09 12:08:38,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:08:38,715 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2020-12-09 12:08:38,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-09 12:08:38,715 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 67 [2020-12-09 12:08:38,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:08:38,716 INFO L225 Difference]: With dead ends: 87 [2020-12-09 12:08:38,716 INFO L226 Difference]: Without dead ends: 87 [2020-12-09 12:08:38,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 173 SyntacticMatches, 10 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=558, Invalid=2304, Unknown=0, NotChecked=0, Total=2862 [2020-12-09 12:08:38,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-09 12:08:38,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-12-09 12:08:38,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-09 12:08:38,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2020-12-09 12:08:38,718 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 67 [2020-12-09 12:08:38,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:08:38,718 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2020-12-09 12:08:38,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-09 12:08:38,718 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2020-12-09 12:08:38,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-09 12:08:38,719 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:08:38,719 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 5, 5, 4, 1, 1, 1, 1] [2020-12-09 12:08:38,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable511,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:08:38,920 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:08:38,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:08:38,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1967891372, now seen corresponding path program 2 times [2020-12-09 12:08:38,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:08:38,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149450457] [2020-12-09 12:08:38,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:08:38,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:08:39,013 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2020-12-09 12:08:39,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149450457] [2020-12-09 12:08:39,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133737581] [2020-12-09 12:08:39,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf07d871-660d-41da-a9e3-d64ffee2829e/bin/utaipan/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:08:39,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-12-09 12:08:39,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 12:08:39,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 12:08:39,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:08:39,152 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2020-12-09 12:08:39,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:08:39,291 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2020-12-09 12:08:39,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2051341056] [2020-12-09 12:08:39,292 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 12:08:39,292 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 12:08:39,293 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 12:08:39,293 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 12:08:39,293 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 12:08:39,912 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 12:08:40,090 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 79 [2020-12-09 12:08:40,404 WARN L197 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 101 [2020-12-09 12:08:40,586 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-09 12:08:41,022 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2020-12-09 12:08:41,171 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-12-09 12:08:41,356 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2020-12-09 12:08:41,357 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 12:08:41,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 12:08:41,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2020-12-09 12:08:41,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811913160] [2020-12-09 12:08:41,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-09 12:08:41,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:08:41,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-09 12:08:41,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-12-09 12:08:41,358 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand 13 states. [2020-12-09 12:08:41,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:08:41,423 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2020-12-09 12:08:41,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 12:08:41,423 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 68 [2020-12-09 12:08:41,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:08:41,424 INFO L225 Difference]: With dead ends: 85 [2020-12-09 12:08:41,424 INFO L226 Difference]: Without dead ends: 85 [2020-12-09 12:08:41,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 176 SyntacticMatches, 11 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2020-12-09 12:08:41,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-09 12:08:41,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-12-09 12:08:41,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-09 12:08:41,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2020-12-09 12:08:41,426 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 68 [2020-12-09 12:08:41,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:08:41,426 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2020-12-09 12:08:41,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-09 12:08:41,426 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2020-12-09 12:08:41,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-09 12:08:41,426 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:08:41,426 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2020-12-09 12:08:41,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2020-12-09 12:08:41,628 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:08:41,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:08:41,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1669390242, now seen corresponding path program 2 times [2020-12-09 12:08:41,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:08:41,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350793586] [2020-12-09 12:08:41,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:08:41,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:08:41,716 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-12-09 12:08:41,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350793586] [2020-12-09 12:08:41,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279317234] [2020-12-09 12:08:41,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bf07d871-660d-41da-a9e3-d64ffee2829e/bin/utaipan/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:08:42,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-09 12:08:42,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 12:08:42,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 12:08:42,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:08:42,098 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-12-09 12:08:42,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:08:42,161 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-12-09 12:08:42,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1330859325] [2020-12-09 12:08:42,162 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-12-09 12:08:42,162 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 12:08:42,162 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 12:08:42,162 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 12:08:42,162 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 12:08:42,821 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 12:08:42,938 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-12-09 12:08:43,235 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 101 [2020-12-09 12:08:43,414 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-09 12:08:43,823 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2020-12-09 12:08:43,971 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-12-09 12:08:44,148 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2020-12-09 12:08:44,161 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 12:08:44,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 12:08:44,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2020-12-09 12:08:44,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592489471] [2020-12-09 12:08:44,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-09 12:08:44,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:08:44,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-09 12:08:44,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2020-12-09 12:08:44,162 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand 13 states. [2020-12-09 12:08:44,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:08:44,196 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2020-12-09 12:08:44,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 12:08:44,196 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 74 [2020-12-09 12:08:44,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:08:44,197 INFO L225 Difference]: With dead ends: 97 [2020-12-09 12:08:44,197 INFO L226 Difference]: Without dead ends: 97 [2020-12-09 12:08:44,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 198 SyntacticMatches, 12 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2020-12-09 12:08:44,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-09 12:08:44,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-12-09 12:08:44,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-09 12:08:44,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2020-12-09 12:08:44,199 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 74 [2020-12-09 12:08:44,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:08:44,199 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2020-12-09 12:08:44,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-09 12:08:44,199 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2020-12-09 12:08:44,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-09 12:08:44,199 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:08:44,199 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2020-12-09 12:08:44,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable647 [2020-12-09 12:08:44,401 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 12:08:44,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:08:44,402 INFO L82 PathProgramCache]: Analyzing trace with hash -681402850, now seen corresponding path program 3 times [2020-12-09 12:08:44,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:08:44,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911333129] [2020-12-09 12:08:44,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:08:44,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 12:08:44,475 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 12:08:44,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 12:08:44,521 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 12:08:44,547 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 12:08:44,547 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 12:08:44,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable716 [2020-12-09 12:08:44,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 12:08:44 BoogieIcfgContainer [2020-12-09 12:08:44,609 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 12:08:44,609 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 12:08:44,609 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 12:08:44,609 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 12:08:44,610 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:08:02" (3/4) ... [2020-12-09 12:08:44,611 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 12:08:44,658 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_bf07d871-660d-41da-a9e3-d64ffee2829e/bin/utaipan/witness.graphml [2020-12-09 12:08:44,658 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 12:08:44,658 INFO L168 Benchmark]: Toolchain (without parser) took 42587.45 ms. Allocated memory was 98.6 MB in the beginning and 270.5 MB in the end (delta: 172.0 MB). Free memory was 70.5 MB in the beginning and 94.6 MB in the end (delta: -24.0 MB). Peak memory consumption was 147.7 MB. Max. memory is 16.1 GB. [2020-12-09 12:08:44,659 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 98.6 MB. Free memory is still 63.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:08:44,659 INFO L168 Benchmark]: CACSL2BoogieTranslator took 192.77 ms. Allocated memory is still 98.6 MB. Free memory was 70.3 MB in the beginning and 75.7 MB in the end (delta: -5.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 12:08:44,659 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.07 ms. Allocated memory is still 98.6 MB. Free memory was 75.7 MB in the beginning and 73.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 12:08:44,659 INFO L168 Benchmark]: Boogie Preprocessor took 19.44 ms. Allocated memory is still 98.6 MB. Free memory was 73.9 MB in the beginning and 72.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 12:08:44,659 INFO L168 Benchmark]: RCFGBuilder took 450.82 ms. Allocated memory is still 98.6 MB. Free memory was 72.5 MB in the beginning and 37.3 MB in the end (delta: 35.2 MB). Peak memory consumption was 33.6 MB. Max. memory is 16.1 GB. [2020-12-09 12:08:44,659 INFO L168 Benchmark]: TraceAbstraction took 41837.43 ms. Allocated memory was 98.6 MB in the beginning and 270.5 MB in the end (delta: 172.0 MB). Free memory was 76.4 MB in the beginning and 101.9 MB in the end (delta: -25.5 MB). Peak memory consumption was 145.9 MB. Max. memory is 16.1 GB. [2020-12-09 12:08:44,660 INFO L168 Benchmark]: Witness Printer took 48.85 ms. Allocated memory is still 270.5 MB. Free memory was 101.9 MB in the beginning and 94.6 MB in the end (delta: 7.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-12-09 12:08:44,661 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 98.6 MB. Free memory is still 63.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 192.77 ms. Allocated memory is still 98.6 MB. Free memory was 70.3 MB in the beginning and 75.7 MB in the end (delta: -5.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 27.07 ms. Allocated memory is still 98.6 MB. Free memory was 75.7 MB in the beginning and 73.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.44 ms. Allocated memory is still 98.6 MB. Free memory was 73.9 MB in the beginning and 72.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 450.82 ms. Allocated memory is still 98.6 MB. Free memory was 72.5 MB in the beginning and 37.3 MB in the end (delta: 35.2 MB). Peak memory consumption was 33.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 41837.43 ms. Allocated memory was 98.6 MB in the beginning and 270.5 MB in the end (delta: 172.0 MB). Free memory was 76.4 MB in the beginning and 101.9 MB in the end (delta: -25.5 MB). Peak memory consumption was 145.9 MB. Max. memory is 16.1 GB. * Witness Printer took 48.85 ms. Allocated memory is still 270.5 MB. Free memory was 101.9 MB in the beginning and 94.6 MB in the end (delta: 7.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 38]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L6] static int array[10]; [L17] static int numbers2[10]; [L36] static int numbers4[10]; [L8] int i = 0; VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L8] COND TRUE i < 10 VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L9] array[i] = i [L8] ++i VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L8] COND TRUE i < 10 VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L9] array[i] = i [L8] ++i VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L8] COND TRUE i < 10 VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L9] array[i] = i [L8] ++i VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L8] COND TRUE i < 10 VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L9] array[i] = i [L8] ++i VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L8] COND TRUE i < 10 VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L9] array[i] = i [L8] ++i VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L8] COND TRUE i < 10 VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L9] array[i] = i [L8] ++i VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L8] COND TRUE i < 10 VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L9] array[i] = i [L8] ++i VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L8] COND TRUE i < 10 VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L9] array[i] = i [L8] ++i VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L8] COND TRUE i < 10 VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L9] array[i] = i [L8] ++i VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L8] COND TRUE i < 10 VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L9] array[i] = i [L8] ++i VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L8] COND FALSE !(i < 10) [L12] return array; [L16] int* numbers = getNumbers(); [L18] int i = 0; VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L18] COND TRUE i < 10 VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L19] EXPR numbers[i] VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L19] numbers2[i] = numbers[i] [L18] ++i VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L18] COND TRUE i < 10 VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L19] EXPR numbers[i] VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L19] numbers2[i] = numbers[i] [L18] ++i VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L18] COND TRUE i < 10 VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L19] EXPR numbers[i] VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L19] numbers2[i] = numbers[i] [L18] ++i VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L18] COND TRUE i < 10 VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L19] EXPR numbers[i] VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L19] numbers2[i] = numbers[i] [L18] ++i VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L18] COND TRUE i < 10 VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L19] EXPR numbers[i] VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L19] numbers2[i] = numbers[i] [L18] ++i VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L18] COND TRUE i < 10 VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L19] EXPR numbers[i] VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L19] numbers2[i] = numbers[i] [L18] ++i VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L18] COND TRUE i < 10 VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L19] EXPR numbers[i] VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L19] numbers2[i] = numbers[i] [L18] ++i VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L18] COND TRUE i < 10 VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L19] EXPR numbers[i] VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L19] numbers2[i] = numbers[i] [L18] ++i VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L18] COND TRUE i < 10 VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L19] EXPR numbers[i] VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L19] numbers2[i] = numbers[i] [L18] ++i VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L18] COND TRUE i < 10 VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L19] EXPR numbers[i] VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L19] numbers2[i] = numbers[i] [L18] ++i VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L18] COND FALSE !(i < 10) [L21] return numbers2; [L25] int* numbers = getNumbers2(); [L26] int numbers3[10]; [L27] int i = 0; VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L27] COND TRUE i < 10 VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L28] EXPR numbers[i] VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L28] numbers3[i] = numbers[i] [L27] ++i VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L27] COND TRUE i < 10 VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L28] EXPR numbers[i] VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L28] numbers3[i] = numbers[i] [L27] ++i VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L27] COND TRUE i < 10 VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L28] EXPR numbers[i] VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L28] numbers3[i] = numbers[i] [L27] ++i VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L27] COND TRUE i < 10 VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L28] EXPR numbers[i] VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L28] numbers3[i] = numbers[i] [L27] ++i VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L27] COND TRUE i < 10 VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L28] EXPR numbers[i] VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L28] numbers3[i] = numbers[i] [L27] ++i VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L27] COND TRUE i < 10 VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L28] EXPR numbers[i] VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L28] numbers3[i] = numbers[i] [L27] ++i VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L27] COND TRUE i < 10 VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L28] EXPR numbers[i] VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L28] numbers3[i] = numbers[i] [L27] ++i VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L27] COND TRUE i < 10 VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L28] EXPR numbers[i] VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L28] numbers3[i] = numbers[i] [L27] ++i VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L27] COND TRUE i < 10 VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L28] EXPR numbers[i] VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L28] numbers3[i] = numbers[i] [L27] ++i VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L27] COND TRUE i < 10 VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L28] EXPR numbers[i] VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L28] numbers3[i] = numbers[i] [L27] ++i VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L27] COND FALSE !(i < 10) [L31] return numbers3; [L31] return numbers3; [L35] int* numbers = getNumbers3(); [L37] int i = 0; VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L37] COND TRUE i < 10 VAL [array={14:0}, numbers2={17:0}, numbers4={15:0}] [L38] numbers[i] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 17 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 41.7s, OverallIterations: 26, TraceHistogramMax: 10, AutomataDifference: 3.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 523 SDtfs, 2058 SDslu, 910 SDs, 0 SdLazy, 2246 SolverSat, 404 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2096 GetRequests, 1542 SyntacticMatches, 99 SemanticMatches, 455 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6391 ImplicationChecksByTransitivity, 22.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=97occurred in iteration=25, 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, 25 MinimizatonAttempts, 79 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 8.9s InterpolantComputationTime, 1661 NumberOfCodeBlocks, 1448 NumberOfCodeBlocksAsserted, 53 NumberOfCheckSat, 2189 ConstructedInterpolants, 461 QuantifiedInterpolants, 1287869 SizeOfPredicates, 66 NumberOfNonLiveVariables, 2870 ConjunctsInSsa, 199 ConjunctsInUnsatCore, 61 InterpolantComputations, 12 PerfectInterpolantSequences, 7678/8488 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]: 417, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 6, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 12, TOOLS_POST_TIME[ms]: 259, 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: 12, TOOLS_QUANTIFIERELIM_TIME[ms]: 256, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 137, FLUID_QUERY_TIME[ms]: 1, FLUID_QUERIES: 26, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 2, DOMAIN_JOIN_TIME[ms]: 47, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME[ms]: 77, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME[ms]: 17, DOMAIN_ISBOTTOM_APPLICATIONS: 6, DOMAIN_ISBOTTOM_TIME[ms]: 11, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 207, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 207, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 3, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 0, PATH_EXPR_TIME[ms]: 0, REGEX_TO_DAG_TIME[ms]: 0, DAG_COMPRESSION_TIME[ms]: 2, DAG_COMPRESSION_PROCESSED_NODES: 53, DAG_COMPRESSION_RETAINED_NODES: 20, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...