./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_c39f030c-46f7-4ae4-aea3-f4faf353bbcd/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c39f030c-46f7-4ae4-aea3-f4faf353bbcd/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c39f030c-46f7-4ae4-aea3-f4faf353bbcd/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c39f030c-46f7-4ae4-aea3-f4faf353bbcd/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_c39f030c-46f7-4ae4-aea3-f4faf353bbcd/bin/utaipan/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c39f030c-46f7-4ae4-aea3-f4faf353bbcd/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c6bee9027c6ee41df2f7df0c67f6de4e3d806cb7 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-memcleanup) --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 17:01:23,376 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 17:01:23,387 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 17:01:23,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 17:01:23,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 17:01:23,416 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 17:01:23,418 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 17:01:23,420 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 17:01:23,422 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 17:01:23,423 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 17:01:23,424 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 17:01:23,426 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 17:01:23,426 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 17:01:23,427 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 17:01:23,428 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 17:01:23,430 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 17:01:23,430 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 17:01:23,431 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 17:01:23,433 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 17:01:23,435 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 17:01:23,437 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 17:01:23,439 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 17:01:23,440 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 17:01:23,441 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 17:01:23,444 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 17:01:23,444 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 17:01:23,445 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 17:01:23,446 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 17:01:23,446 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 17:01:23,447 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 17:01:23,448 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 17:01:23,449 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 17:01:23,449 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 17:01:23,450 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 17:01:23,451 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 17:01:23,452 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 17:01:23,452 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 17:01:23,453 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 17:01:23,453 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 17:01:23,454 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 17:01:23,454 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 17:01:23,455 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c39f030c-46f7-4ae4-aea3-f4faf353bbcd/bin/utaipan/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2020-12-09 17:01:23,473 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 17:01:23,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 17:01:23,473 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 17:01:23,474 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 17:01:23,474 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 17:01:23,474 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 17:01:23,474 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 17:01:23,474 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 17:01:23,474 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 17:01:23,474 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 17:01:23,474 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 17:01:23,475 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 17:01:23,475 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 17:01:23,475 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 17:01:23,475 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 17:01:23,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 17:01:23,476 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 17:01:23,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 17:01:23,476 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 17:01:23,476 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 17:01:23,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 17:01:23,476 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 17:01:23,476 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 17:01:23,476 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 17:01:23,477 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 17:01:23,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 17:01:23,477 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 17:01:23,477 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 17:01:23,477 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 17:01:23,477 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 17:01:23,477 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 17:01:23,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 17:01:23,478 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 17:01:23,478 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 17:01:23,478 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 17:01:23,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 17:01:23,478 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 17:01:23,478 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 17:01:23,478 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_c39f030c-46f7-4ae4-aea3-f4faf353bbcd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c39f030c-46f7-4ae4-aea3-f4faf353bbcd/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6bee9027c6ee41df2f7df0c67f6de4e3d806cb7 [2020-12-09 17:01:23,663 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 17:01:23,682 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 17:01:23,684 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 17:01:23,685 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 17:01:23,685 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 17:01:23,686 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c39f030c-46f7-4ae4-aea3-f4faf353bbcd/bin/utaipan/../../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i [2020-12-09 17:01:23,726 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c39f030c-46f7-4ae4-aea3-f4faf353bbcd/bin/utaipan/data/574b854bc/c52645fd1615437bb3589c83685388d0/FLAG7775f963b [2020-12-09 17:01:24,138 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 17:01:24,138 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c39f030c-46f7-4ae4-aea3-f4faf353bbcd/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i [2020-12-09 17:01:24,148 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c39f030c-46f7-4ae4-aea3-f4faf353bbcd/bin/utaipan/data/574b854bc/c52645fd1615437bb3589c83685388d0/FLAG7775f963b [2020-12-09 17:01:24,160 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c39f030c-46f7-4ae4-aea3-f4faf353bbcd/bin/utaipan/data/574b854bc/c52645fd1615437bb3589c83685388d0 [2020-12-09 17:01:24,163 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 17:01:24,164 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 17:01:24,166 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 17:01:24,166 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 17:01:24,169 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 17:01:24,170 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:01:24" (1/1) ... [2020-12-09 17:01:24,171 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bd72b43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:01:24, skipping insertion in model container [2020-12-09 17:01:24,172 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:01:24" (1/1) ... [2020-12-09 17:01:24,178 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 17:01:24,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 17:01:24,405 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_c39f030c-46f7-4ae4-aea3-f4faf353bbcd/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i[24046,24059] [2020-12-09 17:01:24,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:01:24,416 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 17:01:24,454 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_c39f030c-46f7-4ae4-aea3-f4faf353bbcd/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i[24046,24059] [2020-12-09 17:01:24,455 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:01:24,503 INFO L208 MainTranslator]: Completed translation [2020-12-09 17:01:24,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:01:24 WrapperNode [2020-12-09 17:01:24,504 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 17:01:24,505 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 17:01:24,505 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 17:01:24,505 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 17:01:24,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:01:24" (1/1) ... [2020-12-09 17:01:24,522 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:01:24" (1/1) ... [2020-12-09 17:01:24,544 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 17:01:24,545 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 17:01:24,545 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 17:01:24,545 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 17:01:24,553 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:01:24" (1/1) ... [2020-12-09 17:01:24,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:01:24" (1/1) ... [2020-12-09 17:01:24,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:01:24" (1/1) ... [2020-12-09 17:01:24,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:01:24" (1/1) ... [2020-12-09 17:01:24,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:01:24" (1/1) ... [2020-12-09 17:01:24,569 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:01:24" (1/1) ... [2020-12-09 17:01:24,572 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:01:24" (1/1) ... [2020-12-09 17:01:24,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 17:01:24,575 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 17:01:24,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 17:01:24,575 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 17:01:24,576 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:01:24" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c39f030c-46f7-4ae4-aea3-f4faf353bbcd/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 17:01:24,643 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 17:01:24,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 17:01:24,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 17:01:24,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-09 17:01:24,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 17:01:24,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-09 17:01:24,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 17:01:24,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 17:01:24,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 17:01:24,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 17:01:25,026 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 17:01:25,026 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-09 17:01:25,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:01:25 BoogieIcfgContainer [2020-12-09 17:01:25,029 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 17:01:25,030 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 17:01:25,030 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 17:01:25,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 17:01:25,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 05:01:24" (1/3) ... [2020-12-09 17:01:25,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41cee248 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:01:25, skipping insertion in model container [2020-12-09 17:01:25,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:01:24" (2/3) ... [2020-12-09 17:01:25,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41cee248 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:01:25, skipping insertion in model container [2020-12-09 17:01:25,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:01:25" (3/3) ... [2020-12-09 17:01:25,035 INFO L111 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2020-12-09 17:01:25,045 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 17:01:25,048 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 35 error locations. [2020-12-09 17:01:25,056 INFO L253 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2020-12-09 17:01:25,072 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 17:01:25,072 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 17:01:25,072 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 17:01:25,072 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 17:01:25,072 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 17:01:25,073 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 17:01:25,073 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 17:01:25,073 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 17:01:25,084 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states. [2020-12-09 17:01:25,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 17:01:25,089 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:01:25,089 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 17:01:25,090 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 17:01:25,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:01:25,094 INFO L82 PathProgramCache]: Analyzing trace with hash 201781, now seen corresponding path program 1 times [2020-12-09 17:01:25,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:01:25,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489106260] [2020-12-09 17:01:25,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:01:25,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:01:25,211 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 17:01:25,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489106260] [2020-12-09 17:01:25,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:01:25,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:01:25,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423290866] [2020-12-09 17:01:25,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:01:25,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:01:25,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:01:25,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:01:25,226 INFO L87 Difference]: Start difference. First operand 72 states. Second operand 3 states. [2020-12-09 17:01:25,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:01:25,252 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2020-12-09 17:01:25,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:01:25,253 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 17:01:25,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:01:25,259 INFO L225 Difference]: With dead ends: 95 [2020-12-09 17:01:25,260 INFO L226 Difference]: Without dead ends: 92 [2020-12-09 17:01:25,261 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 17:01:25,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-09 17:01:25,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2020-12-09 17:01:25,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-09 17:01:25,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2020-12-09 17:01:25,286 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 3 [2020-12-09 17:01:25,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:01:25,287 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2020-12-09 17:01:25,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:01:25,287 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2020-12-09 17:01:25,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 17:01:25,287 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:01:25,287 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 17:01:25,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 17:01:25,288 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 17:01:25,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:01:25,288 INFO L82 PathProgramCache]: Analyzing trace with hash 6088482, now seen corresponding path program 1 times [2020-12-09 17:01:25,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:01:25,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474767444] [2020-12-09 17:01:25,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:01:25,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:01:25,314 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 17:01:25,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474767444] [2020-12-09 17:01:25,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:01:25,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:01:25,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242717327] [2020-12-09 17:01:25,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:01:25,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:01:25,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:01:25,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:01:25,316 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 3 states. [2020-12-09 17:01:25,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:01:25,387 INFO L93 Difference]: Finished difference Result 93 states and 103 transitions. [2020-12-09 17:01:25,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:01:25,387 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-09 17:01:25,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:01:25,388 INFO L225 Difference]: With dead ends: 93 [2020-12-09 17:01:25,389 INFO L226 Difference]: Without dead ends: 93 [2020-12-09 17:01:25,389 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 17:01:25,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-09 17:01:25,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 66. [2020-12-09 17:01:25,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-09 17:01:25,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2020-12-09 17:01:25,397 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 4 [2020-12-09 17:01:25,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:01:25,397 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2020-12-09 17:01:25,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:01:25,397 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2020-12-09 17:01:25,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 17:01:25,398 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:01:25,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 17:01:25,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 17:01:25,398 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 17:01:25,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:01:25,399 INFO L82 PathProgramCache]: Analyzing trace with hash 6088483, now seen corresponding path program 1 times [2020-12-09 17:01:25,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:01:25,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551397394] [2020-12-09 17:01:25,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:01:25,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:01:25,441 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 17:01:25,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551397394] [2020-12-09 17:01:25,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:01:25,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:01:25,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977835274] [2020-12-09 17:01:25,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:01:25,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:01:25,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:01:25,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:01:25,444 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand 3 states. [2020-12-09 17:01:25,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:01:25,495 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-12-09 17:01:25,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:01:25,496 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-09 17:01:25,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:01:25,496 INFO L225 Difference]: With dead ends: 61 [2020-12-09 17:01:25,496 INFO L226 Difference]: Without dead ends: 61 [2020-12-09 17:01:25,497 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 17:01:25,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-09 17:01:25,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-12-09 17:01:25,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-09 17:01:25,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2020-12-09 17:01:25,502 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 4 [2020-12-09 17:01:25,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:01:25,502 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2020-12-09 17:01:25,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:01:25,503 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2020-12-09 17:01:25,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 17:01:25,503 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:01:25,503 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:01:25,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 17:01:25,504 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 17:01:25,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:01:25,504 INFO L82 PathProgramCache]: Analyzing trace with hash 568646588, now seen corresponding path program 1 times [2020-12-09 17:01:25,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:01:25,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985608368] [2020-12-09 17:01:25,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:01:25,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:01:25,563 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 17:01:25,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985608368] [2020-12-09 17:01:25,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:01:25,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:01:25,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520108658] [2020-12-09 17:01:25,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:01:25,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:01:25,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:01:25,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:01:25,565 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand 3 states. [2020-12-09 17:01:25,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:01:25,579 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2020-12-09 17:01:25,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:01:25,579 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-09 17:01:25,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:01:25,580 INFO L225 Difference]: With dead ends: 69 [2020-12-09 17:01:25,580 INFO L226 Difference]: Without dead ends: 69 [2020-12-09 17:01:25,580 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 17:01:25,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-09 17:01:25,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-12-09 17:01:25,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-09 17:01:25,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2020-12-09 17:01:25,584 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 10 [2020-12-09 17:01:25,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:01:25,584 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2020-12-09 17:01:25,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:01:25,584 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2020-12-09 17:01:25,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 17:01:25,585 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:01:25,585 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:01:25,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 17:01:25,585 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 17:01:25,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:01:25,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1008683973, now seen corresponding path program 1 times [2020-12-09 17:01:25,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:01:25,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061238695] [2020-12-09 17:01:25,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:01:25,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:01:25,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:01:25,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061238695] [2020-12-09 17:01:25,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288568627] [2020-12-09 17:01:25,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c39f030c-46f7-4ae4-aea3-f4faf353bbcd/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 17:01:25,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:01:25,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 17:01:25,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:01:25,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:01:25,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:01:25,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:01:25,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1249351640] [2020-12-09 17:01:25,760 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-12-09 17:01:25,760 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:01:25,763 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:01:25,767 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:01:25,768 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:01:25,924 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:01:26,195 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:01:26,985 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:01:27,527 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:01:27,969 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 17:01:28,514 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2020-12-09 17:01:29,111 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 78 [2020-12-09 17:01:29,183 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 17:01:29,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 17:01:29,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2020-12-09 17:01:29,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041734144] [2020-12-09 17:01:29,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 17:01:29,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:01:29,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 17:01:29,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-12-09 17:01:29,184 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand 6 states. [2020-12-09 17:01:29,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:01:29,211 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2020-12-09 17:01:29,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 17:01:29,212 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-09 17:01:29,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:01:29,213 INFO L225 Difference]: With dead ends: 94 [2020-12-09 17:01:29,213 INFO L226 Difference]: Without dead ends: 94 [2020-12-09 17:01:29,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-12-09 17:01:29,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-09 17:01:29,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2020-12-09 17:01:29,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-09 17:01:29,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 104 transitions. [2020-12-09 17:01:29,220 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 104 transitions. Word has length 12 [2020-12-09 17:01:29,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:01:29,220 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 104 transitions. [2020-12-09 17:01:29,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 17:01:29,220 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 104 transitions. [2020-12-09 17:01:29,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-09 17:01:29,221 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:01:29,221 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-09 17:01:29,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:01:29,423 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 17:01:29,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:01:29,425 INFO L82 PathProgramCache]: Analyzing trace with hash 496370220, now seen corresponding path program 1 times [2020-12-09 17:01:29,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:01:29,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398649189] [2020-12-09 17:01:29,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:01:29,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:01:29,520 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:01:29,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398649189] [2020-12-09 17:01:29,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694303873] [2020-12-09 17:01:29,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c39f030c-46f7-4ae4-aea3-f4faf353bbcd/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 17:01:29,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:01:29,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 17:01:29,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:01:29,622 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:01:29,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:01:29,642 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:01:29,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [312060572] [2020-12-09 17:01:29,644 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-12-09 17:01:29,644 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:01:29,645 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:01:29,645 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:01:29,645 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:01:29,716 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:01:29,918 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:01:30,538 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:01:31,027 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:01:31,358 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 17:01:31,593 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-12-09 17:01:32,023 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2020-12-09 17:01:32,254 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-09 17:01:32,401 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-12-09 17:01:32,655 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 78 [2020-12-09 17:01:32,916 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-12-09 17:01:32,917 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 17:01:32,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 17:01:32,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2020-12-09 17:01:32,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693511355] [2020-12-09 17:01:32,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 17:01:32,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:01:32,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 17:01:32,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-12-09 17:01:32,918 INFO L87 Difference]: Start difference. First operand 90 states and 104 transitions. Second operand 5 states. [2020-12-09 17:01:32,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:01:32,989 INFO L93 Difference]: Finished difference Result 116 states and 130 transitions. [2020-12-09 17:01:32,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 17:01:32,989 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-12-09 17:01:32,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:01:32,990 INFO L225 Difference]: With dead ends: 116 [2020-12-09 17:01:32,990 INFO L226 Difference]: Without dead ends: 116 [2020-12-09 17:01:32,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-12-09 17:01:32,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-09 17:01:32,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 89. [2020-12-09 17:01:32,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-09 17:01:32,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2020-12-09 17:01:32,995 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 19 [2020-12-09 17:01:32,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:01:32,995 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2020-12-09 17:01:32,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 17:01:32,995 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2020-12-09 17:01:32,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-09 17:01:32,996 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:01:32,996 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-09 17:01:33,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:01:33,198 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 17:01:33,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:01:33,199 INFO L82 PathProgramCache]: Analyzing trace with hash 496370221, now seen corresponding path program 1 times [2020-12-09 17:01:33,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:01:33,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691739310] [2020-12-09 17:01:33,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:01:33,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:01:33,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:01:33,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691739310] [2020-12-09 17:01:33,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74652734] [2020-12-09 17:01:33,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c39f030c-46f7-4ae4-aea3-f4faf353bbcd/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 17:01:33,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:01:33,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 17:01:33,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:01:33,384 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:01:33,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:01:33,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:01:33,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1479967635] [2020-12-09 17:01:33,483 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-12-09 17:01:33,483 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:01:33,484 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:01:33,484 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:01:33,484 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:01:33,539 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:01:33,702 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:01:34,285 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:01:34,667 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:01:34,998 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 17:01:35,237 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 82 [2020-12-09 17:01:35,669 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2020-12-09 17:01:36,050 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-12-09 17:01:36,307 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 78 [2020-12-09 17:01:36,576 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-12-09 17:01:36,576 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 17:01:36,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 17:01:36,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 10 [2020-12-09 17:01:36,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551047861] [2020-12-09 17:01:36,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-09 17:01:36,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:01:36,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-09 17:01:36,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2020-12-09 17:01:36,578 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand 11 states. [2020-12-09 17:01:36,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:01:36,704 INFO L93 Difference]: Finished difference Result 115 states and 127 transitions. [2020-12-09 17:01:36,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 17:01:36,704 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-12-09 17:01:36,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:01:36,705 INFO L225 Difference]: With dead ends: 115 [2020-12-09 17:01:36,705 INFO L226 Difference]: Without dead ends: 115 [2020-12-09 17:01:36,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2020-12-09 17:01:36,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-09 17:01:36,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 88. [2020-12-09 17:01:36,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-09 17:01:36,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2020-12-09 17:01:36,711 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 19 [2020-12-09 17:01:36,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:01:36,712 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2020-12-09 17:01:36,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-09 17:01:36,712 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2020-12-09 17:01:36,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-09 17:01:36,713 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:01:36,713 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1] [2020-12-09 17:01:36,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:01:36,915 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 17:01:36,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:01:36,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1197369291, now seen corresponding path program 2 times [2020-12-09 17:01:36,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:01:36,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946062631] [2020-12-09 17:01:36,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:01:36,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:01:36,983 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-09 17:01:36,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946062631] [2020-12-09 17:01:36,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36104740] [2020-12-09 17:01:36,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c39f030c-46f7-4ae4-aea3-f4faf353bbcd/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 17:01:37,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 17:01:37,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 17:01:37,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-09 17:01:37,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:01:37,081 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-09 17:01:37,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:01:37,139 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-09 17:01:37,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 17:01:37,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5] total 13 [2020-12-09 17:01:37,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708202098] [2020-12-09 17:01:37,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 17:01:37,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:01:37,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 17:01:37,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-12-09 17:01:37,141 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand 10 states. [2020-12-09 17:01:37,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:01:37,325 INFO L93 Difference]: Finished difference Result 152 states and 170 transitions. [2020-12-09 17:01:37,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 17:01:37,326 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-12-09 17:01:37,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:01:37,326 INFO L225 Difference]: With dead ends: 152 [2020-12-09 17:01:37,326 INFO L226 Difference]: Without dead ends: 152 [2020-12-09 17:01:37,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-12-09 17:01:37,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-09 17:01:37,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 103. [2020-12-09 17:01:37,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-09 17:01:37,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2020-12-09 17:01:37,331 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 39 [2020-12-09 17:01:37,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:01:37,331 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2020-12-09 17:01:37,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 17:01:37,331 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2020-12-09 17:01:37,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-09 17:01:37,332 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:01:37,332 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1] [2020-12-09 17:01:37,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:01:37,534 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 17:01:37,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:01:37,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1197369292, now seen corresponding path program 1 times [2020-12-09 17:01:37,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:01:37,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938211865] [2020-12-09 17:01:37,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:01:37,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:01:37,611 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-09 17:01:37,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938211865] [2020-12-09 17:01:37,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100258513] [2020-12-09 17:01:37,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c39f030c-46f7-4ae4-aea3-f4faf353bbcd/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 17:01:37,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:01:37,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 17:01:37,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:01:37,728 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:01:37,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:01:37,760 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:01:37,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [194456044] [2020-12-09 17:01:37,762 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-12-09 17:01:37,762 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:01:37,762 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:01:37,762 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:01:37,762 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:01:37,824 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:01:37,977 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:01:38,544 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:01:38,953 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:01:39,334 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 17:01:39,869 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2020-12-09 17:01:40,267 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-12-09 17:01:40,545 WARN L197 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 78 [2020-12-09 17:01:40,631 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 17:01:40,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 17:01:40,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 10 [2020-12-09 17:01:40,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131684897] [2020-12-09 17:01:40,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 17:01:40,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:01:40,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 17:01:40,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-12-09 17:01:40,633 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand 10 states. [2020-12-09 17:01:40,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:01:40,753 INFO L93 Difference]: Finished difference Result 113 states and 134 transitions. [2020-12-09 17:01:40,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 17:01:40,753 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-12-09 17:01:40,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:01:40,755 INFO L225 Difference]: With dead ends: 113 [2020-12-09 17:01:40,755 INFO L226 Difference]: Without dead ends: 113 [2020-12-09 17:01:40,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2020-12-09 17:01:40,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-09 17:01:40,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2020-12-09 17:01:40,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-09 17:01:40,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 134 transitions. [2020-12-09 17:01:40,761 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 134 transitions. Word has length 39 [2020-12-09 17:01:40,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:01:40,761 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 134 transitions. [2020-12-09 17:01:40,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 17:01:40,761 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 134 transitions. [2020-12-09 17:01:40,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-09 17:01:40,762 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:01:40,763 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1] [2020-12-09 17:01:40,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:01:40,964 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 17:01:40,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:01:40,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1337319924, now seen corresponding path program 1 times [2020-12-09 17:01:40,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:01:40,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538346493] [2020-12-09 17:01:40,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:01:41,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:01:41,044 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-12-09 17:01:41,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538346493] [2020-12-09 17:01:41,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:01:41,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 17:01:41,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769057277] [2020-12-09 17:01:41,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 17:01:41,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:01:41,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 17:01:41,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:01:41,046 INFO L87 Difference]: Start difference. First operand 113 states and 134 transitions. Second operand 5 states. [2020-12-09 17:01:41,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:01:41,134 INFO L93 Difference]: Finished difference Result 127 states and 142 transitions. [2020-12-09 17:01:41,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 17:01:41,134 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2020-12-09 17:01:41,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:01:41,135 INFO L225 Difference]: With dead ends: 127 [2020-12-09 17:01:41,135 INFO L226 Difference]: Without dead ends: 127 [2020-12-09 17:01:41,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 17:01:41,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-12-09 17:01:41,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 107. [2020-12-09 17:01:41,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-09 17:01:41,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 122 transitions. [2020-12-09 17:01:41,138 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 122 transitions. Word has length 52 [2020-12-09 17:01:41,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:01:41,138 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 122 transitions. [2020-12-09 17:01:41,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 17:01:41,138 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 122 transitions. [2020-12-09 17:01:41,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-09 17:01:41,139 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:01:41,139 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:01:41,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339 [2020-12-09 17:01:41,139 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 17:01:41,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:01:41,140 INFO L82 PathProgramCache]: Analyzing trace with hash -18741442, now seen corresponding path program 1 times [2020-12-09 17:01:41,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:01:41,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799826843] [2020-12-09 17:01:41,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:01:41,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:01:41,189 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-12-09 17:01:41,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799826843] [2020-12-09 17:01:41,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:01:41,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 17:01:41,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012125474] [2020-12-09 17:01:41,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 17:01:41,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:01:41,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 17:01:41,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 17:01:41,190 INFO L87 Difference]: Start difference. First operand 107 states and 122 transitions. Second operand 6 states. [2020-12-09 17:01:41,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:01:41,282 INFO L93 Difference]: Finished difference Result 117 states and 132 transitions. [2020-12-09 17:01:41,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 17:01:41,283 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-12-09 17:01:41,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:01:41,284 INFO L225 Difference]: With dead ends: 117 [2020-12-09 17:01:41,284 INFO L226 Difference]: Without dead ends: 117 [2020-12-09 17:01:41,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-09 17:01:41,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-09 17:01:41,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 107. [2020-12-09 17:01:41,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-09 17:01:41,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 121 transitions. [2020-12-09 17:01:41,287 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 121 transitions. Word has length 55 [2020-12-09 17:01:41,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:01:41,288 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 121 transitions. [2020-12-09 17:01:41,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 17:01:41,288 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 121 transitions. [2020-12-09 17:01:41,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-09 17:01:41,289 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:01:41,289 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:01:41,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340 [2020-12-09 17:01:41,289 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 17:01:41,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:01:41,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1899387737, now seen corresponding path program 1 times [2020-12-09 17:01:41,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:01:41,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294124274] [2020-12-09 17:01:41,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:01:41,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:01:41,410 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 56 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-09 17:01:41,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294124274] [2020-12-09 17:01:41,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534674527] [2020-12-09 17:01:41,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c39f030c-46f7-4ae4-aea3-f4faf353bbcd/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 17:01:41,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:01:41,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-09 17:01:41,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:01:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 68 proven. 20 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-09 17:01:41,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:01:42,224 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_dll_create_~head~0.offset Int) (v_DerPreprocessor_1 Int)) (= (select (select (store |c_#memory_int| c_ULTIMATE.start_dll_create_~head~0.base (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~head~0.base) (+ ULTIMATE.start_dll_create_~head~0.offset 12) v_DerPreprocessor_1)) c_ULTIMATE.start_dll_create_~new_head~0.base) c_ULTIMATE.start_dll_create_~new_head~0.offset) 0)) is different from false [2020-12-09 17:01:42,946 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_dll_create_~head~0.offset Int) (v_DerPreprocessor_2 Int) (v_DerPreprocessor_1 Int)) (= 0 (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base) (+ c_ULTIMATE.start_dll_create_~new_head~0.offset 12) v_DerPreprocessor_2)))) (store .cse0 c_ULTIMATE.start_dll_create_~head~0.base (store (select .cse0 c_ULTIMATE.start_dll_create_~head~0.base) (+ ULTIMATE.start_dll_create_~head~0.offset 12) v_DerPreprocessor_1))) c_ULTIMATE.start_dll_create_~new_head~0.base) c_ULTIMATE.start_dll_create_~new_head~0.offset))) is different from false [2020-12-09 17:01:43,803 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_dll_create_~head~0.offset Int) (v_DerPreprocessor_3 Int) (v_DerPreprocessor_2 Int) (v_DerPreprocessor_1 Int)) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base) (+ c_ULTIMATE.start_dll_create_~new_head~0.offset 4) v_DerPreprocessor_3) (+ c_ULTIMATE.start_dll_create_~new_head~0.offset 12) v_DerPreprocessor_2)))) (store .cse0 c_ULTIMATE.start_dll_create_~head~0.base (store (select .cse0 c_ULTIMATE.start_dll_create_~head~0.base) (+ ULTIMATE.start_dll_create_~head~0.offset 12) v_DerPreprocessor_1))) c_ULTIMATE.start_dll_create_~new_head~0.base) c_ULTIMATE.start_dll_create_~new_head~0.offset) 0)) is different from false [2020-12-09 17:01:44,882 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_dll_create_~head~0.offset Int) (|ULTIMATE.start_dll_create_#t~ite7| Int) (v_DerPreprocessor_3 Int) (v_DerPreprocessor_2 Int) (v_DerPreprocessor_1 Int)) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base (store (store (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base) (+ c_ULTIMATE.start_dll_create_~new_head~0.offset 16) |ULTIMATE.start_dll_create_#t~ite7|) (+ c_ULTIMATE.start_dll_create_~new_head~0.offset 4) v_DerPreprocessor_3) (+ c_ULTIMATE.start_dll_create_~new_head~0.offset 12) v_DerPreprocessor_2)))) (store .cse0 c_ULTIMATE.start_dll_create_~head~0.base (store (select .cse0 c_ULTIMATE.start_dll_create_~head~0.base) (+ ULTIMATE.start_dll_create_~head~0.offset 12) v_DerPreprocessor_1))) c_ULTIMATE.start_dll_create_~new_head~0.base) c_ULTIMATE.start_dll_create_~new_head~0.offset) 0)) is different from false [2020-12-09 17:01:45,613 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_dll_create_~head~0.offset Int) (|ULTIMATE.start_dll_create_#t~ite7| Int) (v_DerPreprocessor_3 Int) (v_DerPreprocessor_2 Int) (v_DerPreprocessor_1 Int)) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base (store (store (store (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base) (+ c_ULTIMATE.start_dll_create_~new_head~0.offset 8) 0) (+ c_ULTIMATE.start_dll_create_~new_head~0.offset 16) |ULTIMATE.start_dll_create_#t~ite7|) (+ c_ULTIMATE.start_dll_create_~new_head~0.offset 4) v_DerPreprocessor_3) (+ c_ULTIMATE.start_dll_create_~new_head~0.offset 12) v_DerPreprocessor_2)))) (store .cse0 c_ULTIMATE.start_dll_create_~head~0.base (store (select .cse0 c_ULTIMATE.start_dll_create_~head~0.base) (+ ULTIMATE.start_dll_create_~head~0.offset 12) v_DerPreprocessor_1))) c_ULTIMATE.start_dll_create_~new_head~0.base) c_ULTIMATE.start_dll_create_~new_head~0.offset) 0)) is different from false [2020-12-09 17:01:45,686 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 60 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 6 not checked. [2020-12-09 17:01:45,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1235616062] [2020-12-09 17:01:45,688 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2020-12-09 17:01:45,688 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:01:45,688 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:01:45,689 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:01:45,689 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:01:45,751 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:01:45,766 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:01:45,772 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:01:45,918 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:01:46,481 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:01:47,688 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:01:47,726 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:01:47,735 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:01:47,770 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:01:47,778 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:01:47,816 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:01:50,500 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:01:50,974 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:01:51,242 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 17:01:51,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 17:01:51,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 14] total 25 [2020-12-09 17:01:51,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644647042] [2020-12-09 17:01:51,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-09 17:01:51,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:01:51,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-09 17:01:51,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=323, Unknown=5, NotChecked=200, Total=600 [2020-12-09 17:01:51,245 INFO L87 Difference]: Start difference. First operand 107 states and 121 transitions. Second operand 25 states. [2020-12-09 17:01:51,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:01:51,873 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2020-12-09 17:01:51,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-09 17:01:51,873 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 59 [2020-12-09 17:01:51,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:01:51,874 INFO L225 Difference]: With dead ends: 136 [2020-12-09 17:01:51,874 INFO L226 Difference]: Without dead ends: 136 [2020-12-09 17:01:51,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 105 SyntacticMatches, 11 SemanticMatches, 37 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=281, Invalid=856, Unknown=5, NotChecked=340, Total=1482 [2020-12-09 17:01:51,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-12-09 17:01:51,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 109. [2020-12-09 17:01:51,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-09 17:01:51,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 123 transitions. [2020-12-09 17:01:51,876 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 123 transitions. Word has length 59 [2020-12-09 17:01:51,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:01:51,877 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 123 transitions. [2020-12-09 17:01:51,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-09 17:01:51,877 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 123 transitions. [2020-12-09 17:01:51,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-09 17:01:51,877 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:01:51,877 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:01:52,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:01:52,079 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 17:01:52,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:01:52,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1111941965, now seen corresponding path program 1 times [2020-12-09 17:01:52,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:01:52,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030999610] [2020-12-09 17:01:52,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:01:52,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:01:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 50 proven. 32 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-09 17:01:52,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030999610] [2020-12-09 17:01:52,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903076548] [2020-12-09 17:01:52,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c39f030c-46f7-4ae4-aea3-f4faf353bbcd/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 17:01:52,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:01:52,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-09 17:01:52,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:01:52,589 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 68 proven. 20 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-09 17:01:52,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:01:57,608 WARN L197 SmtUtils]: Spent 729.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-12-09 17:02:05,244 WARN L197 SmtUtils]: Spent 787.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-12-09 17:02:15,828 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_dll_create_~head~0.offset Int) (v_DerPreprocessor_6 Int) (v_DerPreprocessor_5 Int) (|ULTIMATE.start_dll_create_#t~ite7| Int) (v_DerPreprocessor_4 Int)) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base (store (store (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base) (+ c_ULTIMATE.start_dll_create_~new_head~0.offset 16) |ULTIMATE.start_dll_create_#t~ite7|) (+ c_ULTIMATE.start_dll_create_~new_head~0.offset 4) v_DerPreprocessor_6) (+ c_ULTIMATE.start_dll_create_~new_head~0.offset 12) v_DerPreprocessor_5)))) (store .cse0 c_ULTIMATE.start_dll_create_~head~0.base (store (select .cse0 c_ULTIMATE.start_dll_create_~head~0.base) (+ ULTIMATE.start_dll_create_~head~0.offset 12) v_DerPreprocessor_4))) c_ULTIMATE.start_dll_create_~new_head~0.base) (+ c_ULTIMATE.start_dll_create_~new_head~0.offset 8)) 0)) is different from false [2020-12-09 17:02:15,895 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 60 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 1 not checked. [2020-12-09 17:02:15,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1309073166] [2020-12-09 17:02:15,896 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2020-12-09 17:02:15,896 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:02:15,897 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:02:15,897 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:02:15,897 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:02:15,973 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:02:16,172 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:02:18,095 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:02:18,131 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:02:18,140 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:02:18,148 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:02:18,156 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:02:18,220 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:02:18,926 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:02:19,380 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:02:19,392 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:02:19,405 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:02:21,290 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:02:21,741 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:02:21,995 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 17:02:21,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 17:02:21,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 14] total 24 [2020-12-09 17:02:21,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704036399] [2020-12-09 17:02:21,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-09 17:02:21,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:02:21,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-09 17:02:21,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=412, Unknown=26, NotChecked=42, Total=552 [2020-12-09 17:02:21,996 INFO L87 Difference]: Start difference. First operand 109 states and 123 transitions. Second operand 24 states. [2020-12-09 17:02:22,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:02:22,543 INFO L93 Difference]: Finished difference Result 136 states and 149 transitions. [2020-12-09 17:02:22,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-09 17:02:22,543 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 60 [2020-12-09 17:02:22,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:02:22,544 INFO L225 Difference]: With dead ends: 136 [2020-12-09 17:02:22,544 INFO L226 Difference]: Without dead ends: 136 [2020-12-09 17:02:22,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 110 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=259, Invalid=909, Unknown=26, NotChecked=66, Total=1260 [2020-12-09 17:02:22,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-12-09 17:02:22,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 109. [2020-12-09 17:02:22,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-09 17:02:22,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 122 transitions. [2020-12-09 17:02:22,546 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 122 transitions. Word has length 60 [2020-12-09 17:02:22,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:02:22,546 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 122 transitions. [2020-12-09 17:02:22,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-09 17:02:22,547 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 122 transitions. [2020-12-09 17:02:22,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-09 17:02:22,547 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:02:22,547 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:02:22,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2020-12-09 17:02:22,749 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 17:02:22,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:02:22,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1133545265, now seen corresponding path program 1 times [2020-12-09 17:02:22,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:02:22,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630877134] [2020-12-09 17:02:22,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:02:22,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:02:22,899 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 56 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-09 17:02:22,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630877134] [2020-12-09 17:02:22,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672162827] [2020-12-09 17:02:22,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c39f030c-46f7-4ae4-aea3-f4faf353bbcd/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 17:02:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:02:22,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-09 17:02:22,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:02:23,372 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 60 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-09 17:02:23,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:02:31,465 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 60 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-09 17:02:31,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1283029314] [2020-12-09 17:02:31,467 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2020-12-09 17:02:31,467 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:02:31,468 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:02:31,468 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:02:31,468 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:02:31,542 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:02:31,710 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:02:32,260 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:02:33,542 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:02:33,619 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:02:33,627 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:02:33,636 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:02:33,708 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:02:33,716 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:02:36,753 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:02:37,245 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:02:37,544 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 17:02:37,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 17:02:37,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 13] total 31 [2020-12-09 17:02:37,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858466922] [2020-12-09 17:02:37,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-09 17:02:37,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:02:37,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-09 17:02:37,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=829, Unknown=5, NotChecked=0, Total=930 [2020-12-09 17:02:37,546 INFO L87 Difference]: Start difference. First operand 109 states and 122 transitions. Second operand 31 states. [2020-12-09 17:02:39,049 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse7 (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_create_~new_head~0.base))) (let ((.cse3 (not (= c_ULTIMATE.start_dll_create_~head~0.base 0))) (.cse0 (select .cse7 (+ c_ULTIMATE.start_dll_create_~new_head~0.offset 4))) (.cse4 (select |c_#valid| c_ULTIMATE.start_dll_create_~head~0.base)) (.cse6 (select |c_#valid| c_ULTIMATE.start_dll_create_~new_head~0.base))) (and (<= 0 c_ULTIMATE.start_dll_create_~new_head~0.offset) (not (= .cse0 0)) (exists ((v_ULTIMATE.start_dll_create_~head~0.offset_50 Int) (ULTIMATE.start_dll_create_~new_head~0.offset Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_create_~head~0.base))) (let ((.cse2 (select .cse1 (+ ULTIMATE.start_dll_create_~new_head~0.offset 4)))) (and (= (select .cse1 (+ ULTIMATE.start_dll_create_~new_head~0.offset 12)) 0) (<= 0 ULTIMATE.start_dll_create_~new_head~0.offset) (not (= c_ULTIMATE.start_dll_create_~head~0.base .cse2)) (<= ULTIMATE.start_dll_create_~new_head~0.offset 0) (<= c_ULTIMATE.start_dll_create_~head~0.offset ULTIMATE.start_dll_create_~new_head~0.offset) (not (= .cse2 0)) (= c_ULTIMATE.start_dll_create_~head~0.base (select (select |c_#memory_$Pointer$.base| .cse2) (+ v_ULTIMATE.start_dll_create_~head~0.offset_50 12))))))) (<= c_ULTIMATE.start_dll_create_~new_head~0.offset 0) (exists ((ULTIMATE.start_dll_create_~head~0.offset Int)) (= c_ULTIMATE.start_dll_create_~new_head~0.base (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_create_~new_head~0.base) (+ c_ULTIMATE.start_dll_create_~new_head~0.offset 4))) (+ ULTIMATE.start_dll_create_~head~0.offset 12)))) .cse3 (= (select (select |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base) c_ULTIMATE.start_dll_create_~new_head~0.offset) 0) (= .cse4 1) (not (= c_ULTIMATE.start_dll_create_~new_head~0.base 0)) (forall ((ULTIMATE.start_dll_create_~head~0.offset Int) (v_ULTIMATE.start_main_~head~1.offset_59 Int)) (or (< v_ULTIMATE.start_main_~head~1.offset_59 0) (not (= (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_create_~head~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_create_~head~0.base) (+ ULTIMATE.start_dll_create_~head~0.offset 12) c_ULTIMATE.start_dll_create_~new_head~0.base)) c_ULTIMATE.start_dll_create_~new_head~0.base) (+ v_ULTIMATE.start_main_~head~1.offset_59 4)) 0)) (< c_ULTIMATE.start_dll_create_~new_head~0.offset v_ULTIMATE.start_main_~head~1.offset_59))) (or .cse3 (< c_ULTIMATE.start_dll_create_~new_head~0.offset 0)) (forall ((ULTIMATE.start_dll_create_~head~0.offset Int) (v_ULTIMATE.start_main_~head~1.offset_59 Int)) (or (not (= (select (select (let ((.cse5 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_create_~new_head~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_create_~new_head~0.base) (+ c_ULTIMATE.start_dll_create_~new_head~0.offset 12) 0)))) (store .cse5 c_ULTIMATE.start_dll_create_~head~0.base (store (select .cse5 c_ULTIMATE.start_dll_create_~head~0.base) (+ ULTIMATE.start_dll_create_~head~0.offset 12) c_ULTIMATE.start_dll_create_~new_head~0.base))) c_ULTIMATE.start_dll_create_~new_head~0.base) (+ v_ULTIMATE.start_main_~head~1.offset_59 4)) 0)) (< v_ULTIMATE.start_main_~head~1.offset_59 0) (< c_ULTIMATE.start_dll_create_~new_head~0.offset v_ULTIMATE.start_main_~head~1.offset_59))) (= 0 (select (select |c_#memory_int| c_ULTIMATE.start_dll_create_~head~0.base) c_ULTIMATE.start_dll_create_~head~0.offset)) (= .cse6 1) (not (= .cse0 c_ULTIMATE.start_dll_create_~new_head~0.base)) (= (select .cse7 (+ c_ULTIMATE.start_dll_create_~new_head~0.offset 12)) 0) (<= 1 .cse4) (<= 1 .cse6)))) is different from false [2020-12-09 17:02:39,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:02:39,511 INFO L93 Difference]: Finished difference Result 106 states and 115 transitions. [2020-12-09 17:02:39,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-09 17:02:39,511 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 61 [2020-12-09 17:02:39,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:02:39,512 INFO L225 Difference]: With dead ends: 106 [2020-12-09 17:02:39,512 INFO L226 Difference]: Without dead ends: 103 [2020-12-09 17:02:39,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 101 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=396, Invalid=1858, Unknown=6, NotChecked=92, Total=2352 [2020-12-09 17:02:39,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-09 17:02:39,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2020-12-09 17:02:39,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-09 17:02:39,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 108 transitions. [2020-12-09 17:02:39,514 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 108 transitions. Word has length 61 [2020-12-09 17:02:39,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:02:39,514 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 108 transitions. [2020-12-09 17:02:39,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-09 17:02:39,514 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 108 transitions. [2020-12-09 17:02:39,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-09 17:02:39,515 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:02:39,515 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:02:39,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable627 [2020-12-09 17:02:39,717 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr24REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr25REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr29REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr26REQUIRES_VIOLATION, ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr27REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr28REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 17:02:39,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:02:39,718 INFO L82 PathProgramCache]: Analyzing trace with hash -110325956, now seen corresponding path program 1 times [2020-12-09 17:02:39,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:02:39,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801168607] [2020-12-09 17:02:39,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:02:39,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 17:02:39,780 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 17:02:39,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 17:02:39,818 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 17:02:39,844 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 17:02:39,845 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 17:02:39,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable769 [2020-12-09 17:02:39,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 05:02:39 BoogieIcfgContainer [2020-12-09 17:02:39,890 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 17:02:39,891 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 17:02:39,891 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 17:02:39,891 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 17:02:39,891 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:01:25" (3/4) ... [2020-12-09 17:02:39,893 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 17:02:39,932 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c39f030c-46f7-4ae4-aea3-f4faf353bbcd/bin/utaipan/witness.graphml [2020-12-09 17:02:39,932 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 17:02:39,933 INFO L168 Benchmark]: Toolchain (without parser) took 75768.34 ms. Allocated memory was 92.3 MB in the beginning and 218.1 MB in the end (delta: 125.8 MB). Free memory was 50.8 MB in the beginning and 173.7 MB in the end (delta: -122.8 MB). Peak memory consumption was 4.4 MB. Max. memory is 16.1 GB. [2020-12-09 17:02:39,933 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 92.3 MB. Free memory is still 68.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:02:39,933 INFO L168 Benchmark]: CACSL2BoogieTranslator took 338.38 ms. Allocated memory is still 92.3 MB. Free memory was 50.7 MB in the beginning and 52.3 MB in the end (delta: -1.6 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. [2020-12-09 17:02:39,933 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.02 ms. Allocated memory is still 92.3 MB. Free memory was 52.3 MB in the beginning and 50.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 17:02:39,933 INFO L168 Benchmark]: Boogie Preprocessor took 29.45 ms. Allocated memory is still 92.3 MB. Free memory was 50.5 MB in the beginning and 48.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 17:02:39,933 INFO L168 Benchmark]: RCFGBuilder took 454.12 ms. Allocated memory was 92.3 MB in the beginning and 123.7 MB in the end (delta: 31.5 MB). Free memory was 48.7 MB in the beginning and 100.1 MB in the end (delta: -51.4 MB). Peak memory consumption was 16.6 MB. Max. memory is 16.1 GB. [2020-12-09 17:02:39,933 INFO L168 Benchmark]: TraceAbstraction took 74860.43 ms. Allocated memory was 123.7 MB in the beginning and 218.1 MB in the end (delta: 94.4 MB). Free memory was 100.1 MB in the beginning and 178.9 MB in the end (delta: -78.8 MB). Peak memory consumption was 144.1 MB. Max. memory is 16.1 GB. [2020-12-09 17:02:39,933 INFO L168 Benchmark]: Witness Printer took 41.54 ms. Allocated memory is still 218.1 MB. Free memory was 178.9 MB in the beginning and 173.7 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 17:02:39,934 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 92.3 MB. Free memory is still 68.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 338.38 ms. Allocated memory is still 92.3 MB. Free memory was 50.7 MB in the beginning and 52.3 MB in the end (delta: -1.6 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.02 ms. Allocated memory is still 92.3 MB. Free memory was 52.3 MB in the beginning and 50.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.45 ms. Allocated memory is still 92.3 MB. Free memory was 50.5 MB in the beginning and 48.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 454.12 ms. Allocated memory was 92.3 MB in the beginning and 123.7 MB in the end (delta: 31.5 MB). Free memory was 48.7 MB in the beginning and 100.1 MB in the end (delta: -51.4 MB). Peak memory consumption was 16.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 74860.43 ms. Allocated memory was 123.7 MB in the beginning and 218.1 MB in the end (delta: 94.4 MB). Free memory was 100.1 MB in the beginning and 178.9 MB in the end (delta: -78.8 MB). Peak memory consumption was 144.1 MB. Max. memory is 16.1 GB. * Witness Printer took 41.54 ms. Allocated memory is still 218.1 MB. Free memory was 178.9 MB in the beginning and 173.7 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 616]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L599] const int len = 5; [L579] DLL head = ((void *)0); [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND FALSE !(\read(head)) [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND FALSE !(len > 0) [L596] return head; [L600] DLL head = dll_create(len); [L601] head->next [L601] COND TRUE head->next [L602] EXPR head->data_0 [L602] EXPR 0 != head->data_0 || 0 != head->data_1 [L602] EXPR head->data_1 [L602] EXPR 0 != head->data_0 || 0 != head->data_1 [L602] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L602] EXPR head->data_2 [L602] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L602] COND TRUE 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L616] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 72 locations, 35 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 74.7s, OverallIterations: 15, TraceHistogramMax: 5, AutomataDifference: 4.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 585 SDtfs, 3435 SDslu, 1707 SDs, 0 SdLazy, 1989 SolverSat, 421 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 851 GetRequests, 600 SyntacticMatches, 26 SemanticMatches, 225 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 1136 ImplicationChecksByTransitivity, 43.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=113occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 14 MinimizatonAttempts, 244 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 37.2s InterpolantComputationTime, 805 NumberOfCodeBlocks, 778 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 1022 ConstructedInterpolants, 52 QuantifiedInterpolants, 229126 SizeOfPredicates, 84 NumberOfNonLiveVariables, 2009 ConjunctsInSsa, 149 ConjunctsInUnsatCore, 30 InterpolantComputations, 8 PerfectInterpolantSequences, 1207/1510 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: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...