./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.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_6c3eac0a-6501-44f9-abeb-2423c496f8d5/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_6c3eac0a-6501-44f9-abeb-2423c496f8d5/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_6c3eac0a-6501-44f9-abeb-2423c496f8d5/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_6c3eac0a-6501-44f9-abeb-2423c496f8d5/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c -s /tmp/vcloud-vcloud-master/worker/run_dir_6c3eac0a-6501-44f9-abeb-2423c496f8d5/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_6c3eac0a-6501-44f9-abeb-2423c496f8d5/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 07b05923cf5c1b39a35ab81b524575a0a488c268 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 15:38:56,289 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 15:38:56,291 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 15:38:56,320 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 15:38:56,321 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 15:38:56,322 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 15:38:56,324 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 15:38:56,326 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 15:38:56,329 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 15:38:56,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 15:38:56,331 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 15:38:56,332 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 15:38:56,333 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 15:38:56,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 15:38:56,335 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 15:38:56,337 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 15:38:56,338 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 15:38:56,339 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 15:38:56,341 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 15:38:56,343 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 15:38:56,345 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 15:38:56,346 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 15:38:56,348 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 15:38:56,349 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 15:38:56,363 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 15:38:56,363 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 15:38:56,364 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 15:38:56,365 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 15:38:56,365 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 15:38:56,366 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 15:38:56,367 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 15:38:56,368 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 15:38:56,369 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 15:38:56,369 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 15:38:56,370 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 15:38:56,371 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 15:38:56,371 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 15:38:56,372 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 15:38:56,372 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 15:38:56,373 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 15:38:56,373 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 15:38:56,374 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_6c3eac0a-6501-44f9-abeb-2423c496f8d5/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 15:38:56,400 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 15:38:56,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 15:38:56,401 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 15:38:56,401 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 15:38:56,401 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 15:38:56,402 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 15:38:56,402 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 15:38:56,402 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 15:38:56,402 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 15:38:56,408 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 15:38:56,408 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 15:38:56,409 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 15:38:56,409 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 15:38:56,409 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 15:38:56,409 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 15:38:56,410 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 15:38:56,410 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 15:38:56,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 15:38:56,410 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 15:38:56,411 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 15:38:56,411 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 15:38:56,411 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 15:38:56,411 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 15:38:56,411 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 15:38:56,411 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 15:38:56,412 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 15:38:56,412 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 15:38:56,412 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 15:38:56,412 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 15:38:56,412 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 15:38:56,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 15:38:56,413 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 15:38:56,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 15:38:56,413 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 15:38:56,413 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 15:38:56,413 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 15:38:56,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 15:38:56,414 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 15:38:56,414 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 15:38:56,414 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_6c3eac0a-6501-44f9-abeb-2423c496f8d5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_6c3eac0a-6501-44f9-abeb-2423c496f8d5/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07b05923cf5c1b39a35ab81b524575a0a488c268 [2020-12-09 15:38:56,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 15:38:56,610 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 15:38:56,612 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 15:38:56,613 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 15:38:56,613 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 15:38:56,614 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_6c3eac0a-6501-44f9-abeb-2423c496f8d5/bin/utaipan/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c [2020-12-09 15:38:56,653 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6c3eac0a-6501-44f9-abeb-2423c496f8d5/bin/utaipan/data/e8c3bf7bf/13e8f96ab95c4f928198de715507d53a/FLAG21374babd [2020-12-09 15:38:57,020 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 15:38:57,020 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_6c3eac0a-6501-44f9-abeb-2423c496f8d5/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c [2020-12-09 15:38:57,030 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6c3eac0a-6501-44f9-abeb-2423c496f8d5/bin/utaipan/data/e8c3bf7bf/13e8f96ab95c4f928198de715507d53a/FLAG21374babd [2020-12-09 15:38:57,046 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_6c3eac0a-6501-44f9-abeb-2423c496f8d5/bin/utaipan/data/e8c3bf7bf/13e8f96ab95c4f928198de715507d53a [2020-12-09 15:38:57,048 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 15:38:57,049 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 15:38:57,050 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 15:38:57,050 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 15:38:57,052 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 15:38:57,053 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 03:38:57" (1/1) ... [2020-12-09 15:38:57,054 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77128109 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:38:57, skipping insertion in model container [2020-12-09 15:38:57,055 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 03:38:57" (1/1) ... [2020-12-09 15:38:57,060 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 15:38:57,069 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 15:38:57,159 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 15:38:57,165 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 15:38:57,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 15:38:57,186 INFO L208 MainTranslator]: Completed translation [2020-12-09 15:38:57,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:38:57 WrapperNode [2020-12-09 15:38:57,187 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 15:38:57,188 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 15:38:57,188 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 15:38:57,188 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 15:38:57,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:38:57" (1/1) ... [2020-12-09 15:38:57,198 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:38:57" (1/1) ... [2020-12-09 15:38:57,212 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 15:38:57,213 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 15:38:57,213 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 15:38:57,213 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 15:38:57,218 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:38:57" (1/1) ... [2020-12-09 15:38:57,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:38:57" (1/1) ... [2020-12-09 15:38:57,220 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:38:57" (1/1) ... [2020-12-09 15:38:57,220 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:38:57" (1/1) ... [2020-12-09 15:38:57,224 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:38:57" (1/1) ... [2020-12-09 15:38:57,227 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:38:57" (1/1) ... [2020-12-09 15:38:57,228 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:38:57" (1/1) ... [2020-12-09 15:38:57,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 15:38:57,230 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 15:38:57,230 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 15:38:57,230 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 15:38:57,231 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:38:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6c3eac0a-6501-44f9-abeb-2423c496f8d5/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 15:38:57,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 15:38:57,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 15:38:57,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 15:38:57,291 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 15:38:57,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 15:38:57,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 15:38:57,567 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 15:38:57,567 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-09 15:38:57,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 03:38:57 BoogieIcfgContainer [2020-12-09 15:38:57,569 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 15:38:57,571 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 15:38:57,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 15:38:57,574 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 15:38:57,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 03:38:57" (1/3) ... [2020-12-09 15:38:57,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22f199aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 03:38:57, skipping insertion in model container [2020-12-09 15:38:57,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:38:57" (2/3) ... [2020-12-09 15:38:57,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22f199aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 03:38:57, skipping insertion in model container [2020-12-09 15:38:57,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 03:38:57" (3/3) ... [2020-12-09 15:38:57,578 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength6.c [2020-12-09 15:38:57,592 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 15:38:57,596 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-12-09 15:38:57,608 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-12-09 15:38:57,626 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 15:38:57,627 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 15:38:57,627 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 15:38:57,627 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 15:38:57,627 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 15:38:57,627 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 15:38:57,627 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 15:38:57,627 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 15:38:57,638 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-12-09 15:38:57,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 15:38:57,644 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:38:57,645 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 15:38:57,645 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:38:57,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:38:57,651 INFO L82 PathProgramCache]: Analyzing trace with hash 3150815, now seen corresponding path program 1 times [2020-12-09 15:38:57,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:38:57,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141925439] [2020-12-09 15:38:57,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:38:57,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:38:57,792 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 15:38:57,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141925439] [2020-12-09 15:38:57,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:38:57,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 15:38:57,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682165542] [2020-12-09 15:38:57,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 15:38:57,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:38:57,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 15:38:57,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 15:38:57,814 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-12-09 15:38:57,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:38:57,855 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-12-09 15:38:57,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 15:38:57,856 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-09 15:38:57,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:38:57,862 INFO L225 Difference]: With dead ends: 37 [2020-12-09 15:38:57,862 INFO L226 Difference]: Without dead ends: 35 [2020-12-09 15:38:57,864 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 15:38:57,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-09 15:38:57,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2020-12-09 15:38:57,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-09 15:38:57,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-12-09 15:38:57,892 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2020-12-09 15:38:57,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:38:57,893 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-12-09 15:38:57,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 15:38:57,893 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-12-09 15:38:57,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 15:38:57,893 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:38:57,893 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 15:38:57,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 15:38:57,894 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:38:57,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:38:57,895 INFO L82 PathProgramCache]: Analyzing trace with hash 3078660, now seen corresponding path program 1 times [2020-12-09 15:38:57,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:38:57,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725000427] [2020-12-09 15:38:57,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:38:57,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:38:57,927 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 15:38:57,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725000427] [2020-12-09 15:38:57,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:38:57,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 15:38:57,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411634364] [2020-12-09 15:38:57,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 15:38:57,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:38:57,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 15:38:57,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 15:38:57,929 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 3 states. [2020-12-09 15:38:57,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:38:57,946 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2020-12-09 15:38:57,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 15:38:57,946 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-09 15:38:57,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:38:57,947 INFO L225 Difference]: With dead ends: 37 [2020-12-09 15:38:57,947 INFO L226 Difference]: Without dead ends: 37 [2020-12-09 15:38:57,948 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 15:38:57,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-09 15:38:57,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2020-12-09 15:38:57,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-09 15:38:57,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-12-09 15:38:57,952 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 4 [2020-12-09 15:38:57,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:38:57,952 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-12-09 15:38:57,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 15:38:57,952 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-12-09 15:38:57,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 15:38:57,952 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:38:57,953 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 15:38:57,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 15:38:57,953 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:38:57,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:38:57,954 INFO L82 PathProgramCache]: Analyzing trace with hash 3080752, now seen corresponding path program 1 times [2020-12-09 15:38:57,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:38:57,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003481895] [2020-12-09 15:38:57,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:38:57,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:38:57,993 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 15:38:57,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003481895] [2020-12-09 15:38:57,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:38:57,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 15:38:57,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116098894] [2020-12-09 15:38:57,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 15:38:57,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:38:57,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 15:38:57,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 15:38:57,996 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 3 states. [2020-12-09 15:38:58,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:38:58,009 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-12-09 15:38:58,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 15:38:58,009 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-09 15:38:58,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:38:58,010 INFO L225 Difference]: With dead ends: 25 [2020-12-09 15:38:58,010 INFO L226 Difference]: Without dead ends: 25 [2020-12-09 15:38:58,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 15:38:58,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-09 15:38:58,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-12-09 15:38:58,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-09 15:38:58,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-12-09 15:38:58,014 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 4 [2020-12-09 15:38:58,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:38:58,014 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-12-09 15:38:58,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 15:38:58,014 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-12-09 15:38:58,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 15:38:58,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:38:58,014 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 15:38:58,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 15:38:58,014 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:38:58,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:38:58,015 INFO L82 PathProgramCache]: Analyzing trace with hash 95438513, now seen corresponding path program 1 times [2020-12-09 15:38:58,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:38:58,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043510315] [2020-12-09 15:38:58,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:38:58,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:38:58,045 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 15:38:58,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043510315] [2020-12-09 15:38:58,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:38:58,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 15:38:58,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125005861] [2020-12-09 15:38:58,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 15:38:58,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:38:58,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 15:38:58,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 15:38:58,047 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 4 states. [2020-12-09 15:38:58,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:38:58,073 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-12-09 15:38:58,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 15:38:58,073 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-12-09 15:38:58,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:38:58,074 INFO L225 Difference]: With dead ends: 21 [2020-12-09 15:38:58,074 INFO L226 Difference]: Without dead ends: 21 [2020-12-09 15:38:58,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 15:38:58,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-09 15:38:58,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-09 15:38:58,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-09 15:38:58,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-12-09 15:38:58,076 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 5 [2020-12-09 15:38:58,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:38:58,076 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-12-09 15:38:58,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 15:38:58,076 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-12-09 15:38:58,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 15:38:58,077 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:38:58,077 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 15:38:58,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 15:38:58,077 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:38:58,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:38:58,077 INFO L82 PathProgramCache]: Analyzing trace with hash 95438514, now seen corresponding path program 1 times [2020-12-09 15:38:58,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:38:58,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175058083] [2020-12-09 15:38:58,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:38:58,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:38:58,110 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 15:38:58,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175058083] [2020-12-09 15:38:58,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:38:58,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 15:38:58,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456603941] [2020-12-09 15:38:58,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 15:38:58,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:38:58,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 15:38:58,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 15:38:58,111 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 4 states. [2020-12-09 15:38:58,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:38:58,147 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-12-09 15:38:58,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 15:38:58,148 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-12-09 15:38:58,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:38:58,148 INFO L225 Difference]: With dead ends: 22 [2020-12-09 15:38:58,148 INFO L226 Difference]: Without dead ends: 22 [2020-12-09 15:38:58,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 15:38:58,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-09 15:38:58,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-09 15:38:58,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-09 15:38:58,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-12-09 15:38:58,152 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 5 [2020-12-09 15:38:58,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:38:58,152 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-12-09 15:38:58,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 15:38:58,152 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-12-09 15:38:58,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 15:38:58,153 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:38:58,153 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2020-12-09 15:38:58,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 15:38:58,153 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:38:58,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:38:58,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1522153131, now seen corresponding path program 1 times [2020-12-09 15:38:58,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:38:58,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962828059] [2020-12-09 15:38:58,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:38:58,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:38:58,187 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 15:38:58,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962828059] [2020-12-09 15:38:58,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856477199] [2020-12-09 15:38:58,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6c3eac0a-6501-44f9-abeb-2423c496f8d5/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 15:38:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:38:58,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 15:38:58,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:38:58,237 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 15:38:58,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 15:38:58,268 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 15:38:58,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1973434432] [2020-12-09 15:38:58,283 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-12-09 15:38:58,283 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 15:38:58,286 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 15:38:58,290 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 15:38:58,290 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 15:38:58,730 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 15:38:58,916 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2020-12-09 15:38:59,047 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2020-12-09 15:38:59,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-09 15:38:59,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3] total 8 [2020-12-09 15:38:59,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046306304] [2020-12-09 15:38:59,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 15:38:59,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:38:59,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 15:38:59,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-09 15:38:59,065 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 5 states. [2020-12-09 15:38:59,192 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-12-09 15:38:59,331 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-12-09 15:38:59,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:38:59,395 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-12-09 15:38:59,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 15:38:59,396 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-09 15:38:59,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:38:59,396 INFO L225 Difference]: With dead ends: 30 [2020-12-09 15:38:59,396 INFO L226 Difference]: Without dead ends: 30 [2020-12-09 15:38:59,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-12-09 15:38:59,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-09 15:38:59,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-12-09 15:38:59,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 15:38:59,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-12-09 15:38:59,399 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 7 [2020-12-09 15:38:59,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:38:59,399 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-12-09 15:38:59,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 15:38:59,399 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-12-09 15:38:59,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 15:38:59,399 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:38:59,399 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2020-12-09 15:38:59,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-09 15:38:59,601 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:38:59,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:38:59,602 INFO L82 PathProgramCache]: Analyzing trace with hash -57893141, now seen corresponding path program 1 times [2020-12-09 15:38:59,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:38:59,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423873216] [2020-12-09 15:38:59,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:38:59,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:38:59,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 15:38:59,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423873216] [2020-12-09 15:38:59,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:38:59,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 15:38:59,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287018781] [2020-12-09 15:38:59,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 15:38:59,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:38:59,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 15:38:59,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 15:38:59,660 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 5 states. [2020-12-09 15:38:59,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:38:59,704 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-12-09 15:38:59,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 15:38:59,705 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-09 15:38:59,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:38:59,705 INFO L225 Difference]: With dead ends: 28 [2020-12-09 15:38:59,705 INFO L226 Difference]: Without dead ends: 28 [2020-12-09 15:38:59,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-09 15:38:59,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-09 15:38:59,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2020-12-09 15:38:59,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-09 15:38:59,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-12-09 15:38:59,707 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 8 [2020-12-09 15:38:59,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:38:59,707 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-12-09 15:38:59,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 15:38:59,708 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-12-09 15:38:59,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 15:38:59,708 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:38:59,708 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:38:59,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-09 15:38:59,708 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:38:59,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:38:59,708 INFO L82 PathProgramCache]: Analyzing trace with hash 262840021, now seen corresponding path program 1 times [2020-12-09 15:38:59,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:38:59,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222027783] [2020-12-09 15:38:59,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:38:59,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:38:59,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 15:38:59,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222027783] [2020-12-09 15:38:59,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491054969] [2020-12-09 15:38:59,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6c3eac0a-6501-44f9-abeb-2423c496f8d5/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 15:38:59,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:38:59,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 15:38:59,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:38:59,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 15:38:59,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 15:38:59,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 15:38:59,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 15:38:59,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [3] total 5 [2020-12-09 15:38:59,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381891686] [2020-12-09 15:38:59,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 15:38:59,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:38:59,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 15:38:59,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 15:38:59,775 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 3 states. [2020-12-09 15:38:59,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:38:59,789 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2020-12-09 15:38:59,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 15:38:59,789 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-09 15:38:59,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:38:59,790 INFO L225 Difference]: With dead ends: 23 [2020-12-09 15:38:59,790 INFO L226 Difference]: Without dead ends: 23 [2020-12-09 15:38:59,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 15:38:59,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-09 15:38:59,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-09 15:38:59,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-09 15:38:59,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-12-09 15:38:59,793 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 10 [2020-12-09 15:38:59,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:38:59,793 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-12-09 15:38:59,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 15:38:59,793 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-12-09 15:38:59,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 15:38:59,794 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:38:59,794 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:38:59,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 15:38:59,996 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:38:59,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:38:59,997 INFO L82 PathProgramCache]: Analyzing trace with hash 262840022, now seen corresponding path program 1 times [2020-12-09 15:38:59,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:38:59,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080255549] [2020-12-09 15:38:59,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:39:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:39:00,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 15:39:00,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080255549] [2020-12-09 15:39:00,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5980208] [2020-12-09 15:39:00,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6c3eac0a-6501-44f9-abeb-2423c496f8d5/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 15:39:00,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:39:00,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 15:39:00,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:39:00,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:39:00,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 15:39:00,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:39:00,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1549746629] [2020-12-09 15:39:00,224 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 15:39:00,224 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 15:39:00,225 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 15:39:00,225 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 15:39:00,225 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 15:39:00,268 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 15:39:00,399 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 15:39:00,406 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 15:39:00,863 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 15:39:01,192 WARN L197 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2020-12-09 15:39:01,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-09 15:39:01,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3, 4, 4] total 13 [2020-12-09 15:39:01,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836599679] [2020-12-09 15:39:01,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 15:39:01,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:39:01,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 15:39:01,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-12-09 15:39:01,588 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 7 states. [2020-12-09 15:39:01,855 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 90 [2020-12-09 15:39:01,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:39:01,918 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2020-12-09 15:39:01,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 15:39:01,918 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-12-09 15:39:01,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:39:01,919 INFO L225 Difference]: With dead ends: 24 [2020-12-09 15:39:01,919 INFO L226 Difference]: Without dead ends: 24 [2020-12-09 15:39:01,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-12-09 15:39:01,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-09 15:39:01,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-12-09 15:39:01,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-09 15:39:01,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-12-09 15:39:01,921 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 10 [2020-12-09 15:39:01,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:39:01,921 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-12-09 15:39:01,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 15:39:01,921 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-12-09 15:39:01,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 15:39:01,921 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:39:01,922 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:39:02,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-09 15:39:02,123 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:39:02,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:39:02,125 INFO L82 PathProgramCache]: Analyzing trace with hash -813808975, now seen corresponding path program 1 times [2020-12-09 15:39:02,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:39:02,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460677992] [2020-12-09 15:39:02,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:39:02,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:39:02,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 15:39:02,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460677992] [2020-12-09 15:39:02,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975120351] [2020-12-09 15:39:02,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6c3eac0a-6501-44f9-abeb-2423c496f8d5/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 15:39:02,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:39:02,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 15:39:02,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:39:02,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:39:02,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 15:39:02,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 15:39:02,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [669229600] [2020-12-09 15:39:02,245 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2020-12-09 15:39:02,245 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 15:39:02,245 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 15:39:02,245 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 15:39:02,245 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 15:39:02,279 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 15:39:02,390 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 15:39:02,396 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 15:39:02,754 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 15:39:03,028 WARN L197 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2020-12-09 15:39:03,475 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 15:39:03,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 15:39:03,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 8 [2020-12-09 15:39:03,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010019011] [2020-12-09 15:39:03,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 15:39:03,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:39:03,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 15:39:03,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-12-09 15:39:03,476 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 8 states. [2020-12-09 15:39:03,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:39:03,602 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2020-12-09 15:39:03,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-09 15:39:03,603 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-12-09 15:39:03,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:39:03,603 INFO L225 Difference]: With dead ends: 65 [2020-12-09 15:39:03,603 INFO L226 Difference]: Without dead ends: 65 [2020-12-09 15:39:03,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2020-12-09 15:39:03,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-09 15:39:03,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 43. [2020-12-09 15:39:03,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-09 15:39:03,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-12-09 15:39:03,606 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 12 [2020-12-09 15:39:03,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:39:03,607 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-12-09 15:39:03,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 15:39:03,607 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-12-09 15:39:03,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-09 15:39:03,607 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:39:03,607 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 1, 1, 1] [2020-12-09 15:39:03,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 15:39:03,809 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:39:03,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:39:03,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1035171327, now seen corresponding path program 1 times [2020-12-09 15:39:03,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:39:03,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881794740] [2020-12-09 15:39:03,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:39:03,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:39:03,891 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 58 proven. 22 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-12-09 15:39:03,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881794740] [2020-12-09 15:39:03,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855783336] [2020-12-09 15:39:03,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6c3eac0a-6501-44f9-abeb-2423c496f8d5/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 15:39:03,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:39:03,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 15:39:03,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:39:03,982 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 58 proven. 22 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-12-09 15:39:03,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 15:39:04,051 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 58 proven. 22 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-12-09 15:39:04,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [739329961] [2020-12-09 15:39:04,052 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 15:39:04,052 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 15:39:04,053 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 15:39:04,053 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 15:39:04,053 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 15:39:04,080 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 15:39:04,158 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 15:39:04,164 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 15:39:04,468 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 15:39:04,823 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2020-12-09 15:39:05,237 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 15:39:05,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 15:39:05,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2020-12-09 15:39:05,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895330948] [2020-12-09 15:39:05,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-09 15:39:05,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:39:05,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-09 15:39:05,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-12-09 15:39:05,238 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 17 states. [2020-12-09 15:39:05,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:39:05,269 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2020-12-09 15:39:05,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 15:39:05,269 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2020-12-09 15:39:05,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:39:05,270 INFO L225 Difference]: With dead ends: 79 [2020-12-09 15:39:05,270 INFO L226 Difference]: Without dead ends: 79 [2020-12-09 15:39:05,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 70 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-12-09 15:39:05,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-09 15:39:05,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-12-09 15:39:05,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-09 15:39:05,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2020-12-09 15:39:05,274 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 31 [2020-12-09 15:39:05,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:39:05,274 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2020-12-09 15:39:05,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-09 15:39:05,274 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2020-12-09 15:39:05,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-09 15:39:05,276 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:39:05,276 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 2, 2, 1, 1, 1] [2020-12-09 15:39:05,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-12-09 15:39:05,477 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:39:05,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:39:05,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1659153023, now seen corresponding path program 2 times [2020-12-09 15:39:05,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:39:05,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676707916] [2020-12-09 15:39:05,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:39:05,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:39:05,649 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 322 proven. 145 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-12-09 15:39:05,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676707916] [2020-12-09 15:39:05,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575685135] [2020-12-09 15:39:05,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6c3eac0a-6501-44f9-abeb-2423c496f8d5/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 15:39:05,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 15:39:05,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 15:39:05,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-09 15:39:05,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:39:05,849 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 323 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-12-09 15:39:05,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 15:39:05,942 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 323 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-12-09 15:39:05,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1628611619] [2020-12-09 15:39:05,944 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 15:39:05,944 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 15:39:05,944 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 15:39:05,944 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 15:39:05,944 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 15:39:05,970 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 15:39:06,050 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 15:39:06,056 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 15:39:06,326 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 15:39:06,479 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-12-09 15:39:06,754 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2020-12-09 15:39:07,505 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 15:39:07,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 15:39:07,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 3, 2] total 18 [2020-12-09 15:39:07,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661885609] [2020-12-09 15:39:07,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-09 15:39:07,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:39:07,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-09 15:39:07,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-12-09 15:39:07,507 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand 18 states. [2020-12-09 15:39:08,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:39:08,563 INFO L93 Difference]: Finished difference Result 202 states and 212 transitions. [2020-12-09 15:39:08,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-09 15:39:08,564 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 67 [2020-12-09 15:39:08,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:39:08,565 INFO L225 Difference]: With dead ends: 202 [2020-12-09 15:39:08,565 INFO L226 Difference]: Without dead ends: 202 [2020-12-09 15:39:08,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 171 SyntacticMatches, 20 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1497 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1161, Invalid=3395, Unknown=0, NotChecked=0, Total=4556 [2020-12-09 15:39:08,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-12-09 15:39:08,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 192. [2020-12-09 15:39:08,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-12-09 15:39:08,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 202 transitions. [2020-12-09 15:39:08,575 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 202 transitions. Word has length 67 [2020-12-09 15:39:08,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:39:08,575 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 202 transitions. [2020-12-09 15:39:08,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-09 15:39:08,575 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 202 transitions. [2020-12-09 15:39:08,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-09 15:39:08,577 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:39:08,577 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 15:39:08,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 15:39:08,778 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:39:08,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:39:08,780 INFO L82 PathProgramCache]: Analyzing trace with hash -551879048, now seen corresponding path program 2 times [2020-12-09 15:39:08,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:39:08,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440935476] [2020-12-09 15:39:08,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:39:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:39:08,936 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 388 proven. 176 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-12-09 15:39:08,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440935476] [2020-12-09 15:39:08,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696461648] [2020-12-09 15:39:08,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6c3eac0a-6501-44f9-abeb-2423c496f8d5/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 15:39:08,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-12-09 15:39:08,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 15:39:08,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 15:39:08,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:39:09,069 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 742 trivial. 0 not checked. [2020-12-09 15:39:09,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 15:39:09,143 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 742 trivial. 0 not checked. [2020-12-09 15:39:09,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 15:39:09,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [14] total 18 [2020-12-09 15:39:09,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217156111] [2020-12-09 15:39:09,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 15:39:09,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:39:09,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 15:39:09,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-12-09 15:39:09,145 INFO L87 Difference]: Start difference. First operand 192 states and 202 transitions. Second operand 6 states. [2020-12-09 15:39:09,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:39:09,161 INFO L93 Difference]: Finished difference Result 191 states and 201 transitions. [2020-12-09 15:39:09,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 15:39:09,162 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-09 15:39:09,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:39:09,163 INFO L225 Difference]: With dead ends: 191 [2020-12-09 15:39:09,163 INFO L226 Difference]: Without dead ends: 190 [2020-12-09 15:39:09,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-12-09 15:39:09,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-12-09 15:39:09,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2020-12-09 15:39:09,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-12-09 15:39:09,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 196 transitions. [2020-12-09 15:39:09,170 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 196 transitions. Word has length 78 [2020-12-09 15:39:09,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:39:09,170 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 196 transitions. [2020-12-09 15:39:09,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 15:39:09,170 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 196 transitions. [2020-12-09 15:39:09,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-09 15:39:09,171 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:39:09,171 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-09 15:39:09,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 15:39:09,373 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:39:09,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:39:09,374 INFO L82 PathProgramCache]: Analyzing trace with hash 71621074, now seen corresponding path program 1 times [2020-12-09 15:39:09,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:39:09,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494804543] [2020-12-09 15:39:09,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:39:09,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:39:09,532 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 388 proven. 176 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-12-09 15:39:09,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494804543] [2020-12-09 15:39:09,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230092536] [2020-12-09 15:39:09,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6c3eac0a-6501-44f9-abeb-2423c496f8d5/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 15:39:09,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:39:09,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-09 15:39:09,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:39:09,791 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 388 proven. 176 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-12-09 15:39:09,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 15:39:10,096 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 388 proven. 176 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-12-09 15:39:10,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [819651226] [2020-12-09 15:39:10,097 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 15:39:10,097 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 15:39:10,098 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 15:39:10,098 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 15:39:10,098 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 15:39:10,128 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 15:39:10,206 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 15:39:10,212 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 15:39:10,524 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 15:39:10,842 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2020-12-09 15:39:11,943 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 15:39:11,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 15:39:11,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 38 [2020-12-09 15:39:11,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487592524] [2020-12-09 15:39:11,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-09 15:39:11,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:39:11,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-09 15:39:11,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=658, Invalid=1412, Unknown=0, NotChecked=0, Total=2070 [2020-12-09 15:39:11,945 INFO L87 Difference]: Start difference. First operand 188 states and 196 transitions. Second operand 38 states. [2020-12-09 15:39:12,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:39:12,024 INFO L93 Difference]: Finished difference Result 383 states and 391 transitions. [2020-12-09 15:39:12,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-09 15:39:12,024 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 79 [2020-12-09 15:39:12,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:39:12,026 INFO L225 Difference]: With dead ends: 383 [2020-12-09 15:39:12,026 INFO L226 Difference]: Without dead ends: 383 [2020-12-09 15:39:12,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 183 SyntacticMatches, 22 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=658, Invalid=1412, Unknown=0, NotChecked=0, Total=2070 [2020-12-09 15:39:12,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-12-09 15:39:12,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2020-12-09 15:39:12,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2020-12-09 15:39:12,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 391 transitions. [2020-12-09 15:39:12,035 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 391 transitions. Word has length 79 [2020-12-09 15:39:12,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:39:12,036 INFO L481 AbstractCegarLoop]: Abstraction has 383 states and 391 transitions. [2020-12-09 15:39:12,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-09 15:39:12,036 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 391 transitions. [2020-12-09 15:39:12,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-12-09 15:39:12,037 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:39:12,037 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-09 15:39:12,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2020-12-09 15:39:12,239 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:39:12,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:39:12,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1979709856, now seen corresponding path program 2 times [2020-12-09 15:39:12,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:39:12,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340067570] [2020-12-09 15:39:12,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:39:12,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:39:12,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3487 backedges. 1779 proven. 852 refuted. 0 times theorem prover too weak. 856 trivial. 0 not checked. [2020-12-09 15:39:12,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340067570] [2020-12-09 15:39:12,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744462384] [2020-12-09 15:39:12,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6c3eac0a-6501-44f9-abeb-2423c496f8d5/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 15:39:12,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 15:39:12,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 15:39:12,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 15:39:12,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:39:12,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3487 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3483 trivial. 0 not checked. [2020-12-09 15:39:12,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 15:39:13,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3487 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3483 trivial. 0 not checked. [2020-12-09 15:39:13,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [67906301] [2020-12-09 15:39:13,094 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 15:39:13,094 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 15:39:13,094 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 15:39:13,094 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 15:39:13,094 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 15:39:13,121 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 15:39:13,199 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 15:39:13,204 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 15:39:13,556 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 15:39:13,901 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2020-12-09 15:39:15,989 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 15:39:15,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 15:39:15,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 4, 4] total 35 [2020-12-09 15:39:15,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840100533] [2020-12-09 15:39:15,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-09 15:39:15,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:39:15,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-09 15:39:15,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=1390, Unknown=0, NotChecked=0, Total=1806 [2020-12-09 15:39:15,991 INFO L87 Difference]: Start difference. First operand 383 states and 391 transitions. Second operand 35 states. [2020-12-09 15:39:22,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:39:22,202 INFO L93 Difference]: Finished difference Result 417 states and 425 transitions. [2020-12-09 15:39:22,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2020-12-09 15:39:22,203 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 157 [2020-12-09 15:39:22,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:39:22,205 INFO L225 Difference]: With dead ends: 417 [2020-12-09 15:39:22,205 INFO L226 Difference]: Without dead ends: 417 [2020-12-09 15:39:22,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 407 SyntacticMatches, 48 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10391 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=7686, Invalid=21044, Unknown=0, NotChecked=0, Total=28730 [2020-12-09 15:39:22,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-12-09 15:39:22,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 407. [2020-12-09 15:39:22,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2020-12-09 15:39:22,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 415 transitions. [2020-12-09 15:39:22,217 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 415 transitions. Word has length 157 [2020-12-09 15:39:22,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:39:22,217 INFO L481 AbstractCegarLoop]: Abstraction has 407 states and 415 transitions. [2020-12-09 15:39:22,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-09 15:39:22,217 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 415 transitions. [2020-12-09 15:39:22,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-12-09 15:39:22,219 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:39:22,219 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 5, 4, 4, 2, 2, 2, 1, 1, 1] [2020-12-09 15:39:22,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 15:39:22,421 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:39:22,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:39:22,422 INFO L82 PathProgramCache]: Analyzing trace with hash -59767779, now seen corresponding path program 3 times [2020-12-09 15:39:22,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:39:22,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330435643] [2020-12-09 15:39:22,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:39:22,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:39:22,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3806 backedges. 1928 proven. 925 refuted. 0 times theorem prover too weak. 953 trivial. 0 not checked. [2020-12-09 15:39:22,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330435643] [2020-12-09 15:39:22,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370566206] [2020-12-09 15:39:22,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6c3eac0a-6501-44f9-abeb-2423c496f8d5/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 15:39:23,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 15:39:23,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 15:39:23,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 15:39:23,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:39:23,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3806 backedges. 0 proven. 1930 refuted. 0 times theorem prover too weak. 1876 trivial. 0 not checked. [2020-12-09 15:39:23,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 15:39:23,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3806 backedges. 0 proven. 1930 refuted. 0 times theorem prover too weak. 1876 trivial. 0 not checked. [2020-12-09 15:39:23,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1751975010] [2020-12-09 15:39:23,454 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 15:39:23,454 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 15:39:23,454 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 15:39:23,454 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 15:39:23,455 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 15:39:23,482 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 15:39:23,566 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 15:39:23,573 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 15:39:23,905 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 15:39:24,270 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2020-12-09 15:39:26,620 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 15:39:26,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 15:39:26,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 4, 4] total 34 [2020-12-09 15:39:26,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866701545] [2020-12-09 15:39:26,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-09 15:39:26,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:39:26,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-09 15:39:26,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=1291, Unknown=0, NotChecked=0, Total=1722 [2020-12-09 15:39:26,622 INFO L87 Difference]: Start difference. First operand 407 states and 415 transitions. Second operand 34 states. [2020-12-09 15:39:32,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:39:32,305 INFO L93 Difference]: Finished difference Result 523 states and 530 transitions. [2020-12-09 15:39:32,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2020-12-09 15:39:32,305 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 172 [2020-12-09 15:39:32,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:39:32,307 INFO L225 Difference]: With dead ends: 523 [2020-12-09 15:39:32,307 INFO L226 Difference]: Without dead ends: 523 [2020-12-09 15:39:32,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 452 SyntacticMatches, 50 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14438 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=10766, Invalid=28240, Unknown=0, NotChecked=0, Total=39006 [2020-12-09 15:39:32,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2020-12-09 15:39:32,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 504. [2020-12-09 15:39:32,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-12-09 15:39:32,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 512 transitions. [2020-12-09 15:39:32,319 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 512 transitions. Word has length 172 [2020-12-09 15:39:32,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:39:32,319 INFO L481 AbstractCegarLoop]: Abstraction has 504 states and 512 transitions. [2020-12-09 15:39:32,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-09 15:39:32,319 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 512 transitions. [2020-12-09 15:39:32,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2020-12-09 15:39:32,324 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:39:32,324 INFO L422 BasicCegarLoop]: trace histogram [130, 130, 130, 5, 5, 4, 1, 1] [2020-12-09 15:39:32,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2020-12-09 15:39:32,526 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:39:32,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:39:32,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1487269935, now seen corresponding path program 3 times [2020-12-09 15:39:32,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:39:32,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769845863] [2020-12-09 15:39:32,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:39:32,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:39:33,241 INFO L134 CoverageAnalysis]: Checked inductivity of 25835 backedges. 8328 proven. 1001 refuted. 0 times theorem prover too weak. 16506 trivial. 0 not checked. [2020-12-09 15:39:33,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769845863] [2020-12-09 15:39:33,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348703265] [2020-12-09 15:39:33,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6c3eac0a-6501-44f9-abeb-2423c496f8d5/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 15:39:34,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 15:39:34,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 15:39:34,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 1483 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-09 15:39:34,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:39:35,226 INFO L134 CoverageAnalysis]: Checked inductivity of 25835 backedges. 8328 proven. 1001 refuted. 0 times theorem prover too weak. 16506 trivial. 0 not checked. [2020-12-09 15:39:35,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 15:39:36,904 INFO L134 CoverageAnalysis]: Checked inductivity of 25835 backedges. 8328 proven. 1001 refuted. 0 times theorem prover too weak. 16506 trivial. 0 not checked. [2020-12-09 15:39:36,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [238409027] [2020-12-09 15:39:36,906 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 15:39:36,906 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 15:39:36,906 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 15:39:36,906 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 15:39:36,906 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 15:39:36,938 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 15:39:37,012 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 15:39:37,019 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 15:39:37,305 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 15:39:37,469 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-12-09 15:39:37,902 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2020-12-09 15:39:45,580 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 15:39:45,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 15:39:45,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 83 [2020-12-09 15:39:45,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161434436] [2020-12-09 15:39:45,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-12-09 15:39:45,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:39:45,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-12-09 15:39:45,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2605, Invalid=5051, Unknown=0, NotChecked=0, Total=7656 [2020-12-09 15:39:45,583 INFO L87 Difference]: Start difference. First operand 504 states and 512 transitions. Second operand 83 states. [2020-12-09 15:39:45,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:39:45,731 INFO L93 Difference]: Finished difference Result 612 states and 620 transitions. [2020-12-09 15:39:45,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-09 15:39:45,732 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 406 [2020-12-09 15:39:45,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:39:45,734 INFO L225 Difference]: With dead ends: 612 [2020-12-09 15:39:45,734 INFO L226 Difference]: Without dead ends: 612 [2020-12-09 15:39:45,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1245 GetRequests, 1029 SyntacticMatches, 130 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15517 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=2605, Invalid=5051, Unknown=0, NotChecked=0, Total=7656 [2020-12-09 15:39:45,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2020-12-09 15:39:45,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2020-12-09 15:39:45,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2020-12-09 15:39:45,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 620 transitions. [2020-12-09 15:39:45,742 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 620 transitions. Word has length 406 [2020-12-09 15:39:45,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:39:45,742 INFO L481 AbstractCegarLoop]: Abstraction has 612 states and 620 transitions. [2020-12-09 15:39:45,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-12-09 15:39:45,742 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 620 transitions. [2020-12-09 15:39:45,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-12-09 15:39:45,748 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:39:45,749 INFO L422 BasicCegarLoop]: trace histogram [160, 160, 160, 5, 5, 4, 1, 1] [2020-12-09 15:39:45,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2020-12-09 15:39:45,950 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:39:45,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:39:45,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1485793615, now seen corresponding path program 4 times [2020-12-09 15:39:45,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:39:45,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668748691] [2020-12-09 15:39:45,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:39:46,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:39:47,267 INFO L134 CoverageAnalysis]: Checked inductivity of 38990 backedges. 0 proven. 31390 refuted. 0 times theorem prover too weak. 7600 trivial. 0 not checked. [2020-12-09 15:39:47,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668748691] [2020-12-09 15:39:47,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013481638] [2020-12-09 15:39:47,267 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6c3eac0a-6501-44f9-abeb-2423c496f8d5/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 15:39:47,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:39:47,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 1783 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-09 15:39:47,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:39:49,140 INFO L134 CoverageAnalysis]: Checked inductivity of 38990 backedges. 0 proven. 31390 refuted. 0 times theorem prover too weak. 7600 trivial. 0 not checked. [2020-12-09 15:39:49,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 15:39:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 38990 backedges. 0 proven. 31390 refuted. 0 times theorem prover too weak. 7600 trivial. 0 not checked. [2020-12-09 15:39:50,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [278131536] [2020-12-09 15:39:50,595 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 15:39:50,595 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 15:39:50,596 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 15:39:50,596 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 15:39:50,596 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 15:39:50,623 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 15:39:50,701 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 15:39:50,708 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 15:39:51,015 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 15:39:51,165 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-12-09 15:39:51,507 WARN L197 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2020-12-09 15:39:52,852 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-12-09 15:39:56,928 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 15:39:56,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 15:39:56,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 17 [2020-12-09 15:39:56,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930043925] [2020-12-09 15:39:56,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-09 15:39:56,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:39:56,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-09 15:39:56,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2020-12-09 15:39:56,930 INFO L87 Difference]: Start difference. First operand 612 states and 620 transitions. Second operand 19 states. [2020-12-09 15:39:57,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:39:57,198 INFO L93 Difference]: Finished difference Result 1106 states and 1122 transitions. [2020-12-09 15:39:57,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 15:39:57,199 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 496 [2020-12-09 15:39:57,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:39:57,204 INFO L225 Difference]: With dead ends: 1106 [2020-12-09 15:39:57,204 INFO L226 Difference]: Without dead ends: 1106 [2020-12-09 15:39:57,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1496 GetRequests, 1310 SyntacticMatches, 160 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2578 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=194, Invalid=562, Unknown=0, NotChecked=0, Total=756 [2020-12-09 15:39:57,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2020-12-09 15:39:57,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 1106. [2020-12-09 15:39:57,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1106 states. [2020-12-09 15:39:57,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 1122 transitions. [2020-12-09 15:39:57,221 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 1122 transitions. Word has length 496 [2020-12-09 15:39:57,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:39:57,221 INFO L481 AbstractCegarLoop]: Abstraction has 1106 states and 1122 transitions. [2020-12-09 15:39:57,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-09 15:39:57,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 1122 transitions. [2020-12-09 15:39:57,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 611 [2020-12-09 15:39:57,224 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:39:57,224 INFO L422 BasicCegarLoop]: trace histogram [192, 192, 192, 6, 6, 6, 5, 4, 4, 1, 1, 1] [2020-12-09 15:39:57,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 15:39:57,425 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:39:57,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:39:57,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1681750897, now seen corresponding path program 4 times [2020-12-09 15:39:57,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:39:57,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686561857] [2020-12-09 15:39:57,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:39:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:39:58,023 INFO L134 CoverageAnalysis]: Checked inductivity of 56237 backedges. 0 proven. 47091 refuted. 0 times theorem prover too weak. 9146 trivial. 0 not checked. [2020-12-09 15:39:58,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686561857] [2020-12-09 15:39:58,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108470774] [2020-12-09 15:39:58,024 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6c3eac0a-6501-44f9-abeb-2423c496f8d5/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 15:39:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:39:58,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 2191 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 15:39:58,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:39:59,021 INFO L134 CoverageAnalysis]: Checked inductivity of 56237 backedges. 0 proven. 47091 refuted. 0 times theorem prover too weak. 9146 trivial. 0 not checked. [2020-12-09 15:39:59,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 15:39:59,916 INFO L134 CoverageAnalysis]: Checked inductivity of 56237 backedges. 0 proven. 47091 refuted. 0 times theorem prover too weak. 9146 trivial. 0 not checked. [2020-12-09 15:39:59,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1181776360] [2020-12-09 15:39:59,917 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 15:39:59,917 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 15:39:59,917 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 15:39:59,918 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 15:39:59,918 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 15:39:59,953 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 15:40:00,029 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 15:40:00,034 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 15:40:00,385 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 15:40:00,747 WARN L197 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2020-12-09 15:40:04,999 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 15:40:04,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 15:40:05,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2020-12-09 15:40:05,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469687495] [2020-12-09 15:40:05,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-09 15:40:05,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:40:05,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-09 15:40:05,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=429, Unknown=0, NotChecked=0, Total=600 [2020-12-09 15:40:05,001 INFO L87 Difference]: Start difference. First operand 1106 states and 1122 transitions. Second operand 17 states. [2020-12-09 15:40:05,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:40:05,174 INFO L93 Difference]: Finished difference Result 1445 states and 1460 transitions. [2020-12-09 15:40:05,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-09 15:40:05,175 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 610 [2020-12-09 15:40:05,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:40:05,181 INFO L225 Difference]: With dead ends: 1445 [2020-12-09 15:40:05,181 INFO L226 Difference]: Without dead ends: 1445 [2020-12-09 15:40:05,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1836 GetRequests, 1621 SyntacticMatches, 192 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4224 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=171, Invalid=429, Unknown=0, NotChecked=0, Total=600 [2020-12-09 15:40:05,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2020-12-09 15:40:05,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 1404. [2020-12-09 15:40:05,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1404 states. [2020-12-09 15:40:05,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 1422 transitions. [2020-12-09 15:40:05,198 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 1422 transitions. Word has length 610 [2020-12-09 15:40:05,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:40:05,199 INFO L481 AbstractCegarLoop]: Abstraction has 1404 states and 1422 transitions. [2020-12-09 15:40:05,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-09 15:40:05,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 1422 transitions. [2020-12-09 15:40:05,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1091 [2020-12-09 15:40:05,205 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:40:05,205 INFO L422 BasicCegarLoop]: trace histogram [352, 352, 352, 11, 11, 10, 1, 1] [2020-12-09 15:40:05,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2020-12-09 15:40:05,406 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 15:40:05,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:40:05,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1517047409, now seen corresponding path program 5 times [2020-12-09 15:40:05,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:40:05,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427778284] [2020-12-09 15:40:05,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:40:05,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:40:11,069 INFO L134 CoverageAnalysis]: Checked inductivity of 189365 backedges. 0 proven. 172645 refuted. 0 times theorem prover too weak. 16720 trivial. 0 not checked. [2020-12-09 15:40:11,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427778284] [2020-12-09 15:40:11,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338174629] [2020-12-09 15:40:11,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6c3eac0a-6501-44f9-abeb-2423c496f8d5/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 15:40:11,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 15:40:11,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 15:40:11,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 15:40:11,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:40:16,711 INFO L134 CoverageAnalysis]: Checked inductivity of 189365 backedges. 10 proven. 31380 refuted. 0 times theorem prover too weak. 157975 trivial. 0 not checked. [2020-12-09 15:40:16,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 15:40:22,950 INFO L134 CoverageAnalysis]: Checked inductivity of 189365 backedges. 0 proven. 31390 refuted. 0 times theorem prover too weak. 157975 trivial. 0 not checked. [2020-12-09 15:40:22,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1756882008] [2020-12-09 15:40:22,952 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 15:40:22,952 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 15:40:22,952 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 15:40:22,952 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 15:40:22,953 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 15:40:22,988 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 15:40:23,071 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 15:40:23,077 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 15:40:23,369 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 15:40:23,560 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-12-09 15:40:24,007 WARN L197 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2020-12-09 15:40:25,850 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-12-09 15:40:44,635 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 15:40:44,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 15:40:44,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 3, 3] total 18 [2020-12-09 15:40:44,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451792180] [2020-12-09 15:40:44,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-09 15:40:44,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:40:44,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-09 15:40:44,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-12-09 15:40:44,639 INFO L87 Difference]: Start difference. First operand 1404 states and 1422 transitions. Second operand 20 states. [2020-12-09 15:40:45,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:40:45,893 INFO L93 Difference]: Finished difference Result 1402 states and 1417 transitions. [2020-12-09 15:40:45,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-09 15:40:45,894 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 1090 [2020-12-09 15:40:45,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:40:45,896 INFO L225 Difference]: With dead ends: 1402 [2020-12-09 15:40:45,896 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 15:40:45,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3294 GetRequests, 2905 SyntacticMatches, 352 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2586 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=249, Invalid=1233, Unknown=0, NotChecked=0, Total=1482 [2020-12-09 15:40:45,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 15:40:45,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 15:40:45,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 15:40:45,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 15:40:45,897 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1090 [2020-12-09 15:40:45,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:40:45,897 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 15:40:45,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-09 15:40:45,897 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 15:40:45,897 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 15:40:46,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable602,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 15:40:46,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 03:40:46 BoogieIcfgContainer [2020-12-09 15:40:46,101 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 15:40:46,102 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 15:40:46,102 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 15:40:46,102 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 15:40:46,102 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 03:38:57" (3/4) ... [2020-12-09 15:40:46,104 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 15:40:46,111 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2020-12-09 15:40:46,111 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-12-09 15:40:46,111 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-09 15:40:46,133 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_6c3eac0a-6501-44f9-abeb-2423c496f8d5/bin/utaipan/witness.graphml [2020-12-09 15:40:46,134 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 15:40:46,134 INFO L168 Benchmark]: Toolchain (without parser) took 109085.26 ms. Allocated memory was 123.7 MB in the beginning and 559.9 MB in the end (delta: 436.2 MB). Free memory was 102.0 MB in the beginning and 311.0 MB in the end (delta: -209.0 MB). Peak memory consumption was 227.5 MB. Max. memory is 16.1 GB. [2020-12-09 15:40:46,134 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 73.4 MB. Free memory was 44.6 MB in the beginning and 44.5 MB in the end (delta: 53.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 15:40:46,135 INFO L168 Benchmark]: CACSL2BoogieTranslator took 137.08 ms. Allocated memory is still 123.7 MB. Free memory was 101.7 MB in the beginning and 92.8 MB in the end (delta: 8.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-12-09 15:40:46,135 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.41 ms. Allocated memory is still 123.7 MB. Free memory was 92.8 MB in the beginning and 91.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 15:40:46,135 INFO L168 Benchmark]: Boogie Preprocessor took 16.59 ms. Allocated memory is still 123.7 MB. Free memory was 91.3 MB in the beginning and 90.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 15:40:46,135 INFO L168 Benchmark]: RCFGBuilder took 339.75 ms. Allocated memory is still 123.7 MB. Free memory was 90.1 MB in the beginning and 68.0 MB in the end (delta: 22.1 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-12-09 15:40:46,136 INFO L168 Benchmark]: TraceAbstraction took 108530.11 ms. Allocated memory was 123.7 MB in the beginning and 559.9 MB in the end (delta: 436.2 MB). Free memory was 67.7 MB in the beginning and 314.1 MB in the end (delta: -246.4 MB). Peak memory consumption was 193.9 MB. Max. memory is 16.1 GB. [2020-12-09 15:40:46,136 INFO L168 Benchmark]: Witness Printer took 32.20 ms. Allocated memory is still 559.9 MB. Free memory was 314.1 MB in the beginning and 311.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 15:40:46,137 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 73.4 MB. Free memory was 44.6 MB in the beginning and 44.5 MB in the end (delta: 53.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 137.08 ms. Allocated memory is still 123.7 MB. Free memory was 101.7 MB in the beginning and 92.8 MB in the end (delta: 8.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 24.41 ms. Allocated memory is still 123.7 MB. Free memory was 92.8 MB in the beginning and 91.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 16.59 ms. Allocated memory is still 123.7 MB. Free memory was 91.3 MB in the beginning and 90.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 339.75 ms. Allocated memory is still 123.7 MB. Free memory was 90.1 MB in the beginning and 68.0 MB in the end (delta: 22.1 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 108530.11 ms. Allocated memory was 123.7 MB in the beginning and 559.9 MB in the end (delta: 436.2 MB). Free memory was 67.7 MB in the beginning and 314.1 MB in the end (delta: -246.4 MB). Peak memory consumption was 193.9 MB. Max. memory is 16.1 GB. * Witness Printer took 32.20 ms. Allocated memory is still 559.9 MB. Free memory was 314.1 MB in the beginning and 311.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 16]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 108.4s, OverallIterations: 20, TraceHistogramMax: 352, AutomataDifference: 15.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 225 SDtfs, 2681 SDslu, 894 SDs, 0 SdLazy, 2454 SolverSat, 799 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10104 GetRequests, 8372 SyntacticMatches, 990 SemanticMatches, 742 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53136 ImplicationChecksByTransitivity, 68.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1404occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 143 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 24.3s InterpolantComputationTime, 6480 NumberOfCodeBlocks, 5124 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 9657 ConstructedInterpolants, 229 QuantifiedInterpolants, 83700342 SizeOfPredicates, 38 NumberOfNonLiveVariables, 7167 ConjunctsInSsa, 155 ConjunctsInUnsatCore, 48 InterpolantComputations, 10 PerfectInterpolantSequences, 478715/959793 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]: 1087, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 16, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 47, TOOLS_POST_TIME[ms]: 511, 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: 45, TOOLS_QUANTIFIERELIM_TIME[ms]: 497, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 119, FLUID_QUERY_TIME[ms]: 4, FLUID_QUERIES: 84, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 6, DOMAIN_JOIN_TIME[ms]: 200, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 5, DOMAIN_WIDEN_TIME[ms]: 290, DOMAIN_ISSUBSETEQ_APPLICATIONS: 7, DOMAIN_ISSUBSETEQ_TIME[ms]: 23, DOMAIN_ISBOTTOM_APPLICATIONS: 16, DOMAIN_ISBOTTOM_TIME[ms]: 22, LOOP_SUMMARIZER_APPLICATIONS: 2, LOOP_SUMMARIZER_CACHE_MISSES: 2, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 885, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 884, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 7, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 1, PATH_EXPR_TIME[ms]: 2, REGEX_TO_DAG_TIME[ms]: 2, DAG_COMPRESSION_TIME[ms]: 8, DAG_COMPRESSION_PROCESSED_NODES: 111, DAG_COMPRESSION_RETAINED_NODES: 51, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...