./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b5699aa Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_15832e7c-29ce-4b72-8b89-4d80d025448f/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_15832e7c-29ce-4b72-8b89-4d80d025448f/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_15832e7c-29ce-4b72-8b89-4d80d025448f/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_15832e7c-29ce-4b72-8b89-4d80d025448f/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_15832e7c-29ce-4b72-8b89-4d80d025448f/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_15832e7c-29ce-4b72-8b89-4d80d025448f/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 44834c55142a76240cb3980fc2bb6f5aeaa27c83 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-6b5699a [2019-11-26 02:18:52,319 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:18:52,321 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:18:52,331 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:18:52,335 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:18:52,337 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:18:52,338 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:18:52,347 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:18:52,350 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:18:52,352 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:18:52,354 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:18:52,355 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:18:52,356 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:18:52,359 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:18:52,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:18:52,362 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:18:52,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:18:52,367 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:18:52,369 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:18:52,373 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:18:52,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:18:52,379 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:18:52,381 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:18:52,382 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:18:52,386 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:18:52,386 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:18:52,386 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:18:52,388 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:18:52,388 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:18:52,389 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:18:52,389 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:18:52,390 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:18:52,391 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:18:52,391 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:18:52,392 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:18:52,392 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:18:52,393 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:18:52,393 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:18:52,393 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:18:52,394 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:18:52,395 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:18:52,396 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_15832e7c-29ce-4b72-8b89-4d80d025448f/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2019-11-26 02:18:52,428 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:18:52,433 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:18:52,434 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:18:52,434 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:18:52,434 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:18:52,435 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:18:52,435 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:18:52,435 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:18:52,435 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:18:52,436 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-26 02:18:52,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-26 02:18:52,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:18:52,436 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:18:52,436 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-26 02:18:52,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:18:52,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:18:52,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:18:52,437 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-26 02:18:52,437 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-26 02:18:52,437 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-26 02:18:52,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:18:52,438 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-26 02:18:52,438 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-26 02:18:52,442 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-26 02:18:52,442 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:18:52,442 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-26 02:18:52,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:18:52,443 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-26 02:18:52,443 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:18:52,444 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:18:52,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:18:52,444 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:18:52,444 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:18:52,445 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-11-26 02:18:52,445 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-26 02:18:52,445 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:18:52,446 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_15832e7c-29ce-4b72-8b89-4d80d025448f/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 44834c55142a76240cb3980fc2bb6f5aeaa27c83 [2019-11-26 02:18:52,579 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:18:52,589 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:18:52,592 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:18:52,594 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:18:52,594 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:18:52,595 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_15832e7c-29ce-4b72-8b89-4d80d025448f/bin/utaipan/../../sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c [2019-11-26 02:18:52,649 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_15832e7c-29ce-4b72-8b89-4d80d025448f/bin/utaipan/data/ddbc89cfa/1615c62168a24edabfaa066a39e93415/FLAG0d16afa14 [2019-11-26 02:18:52,984 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:18:52,985 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_15832e7c-29ce-4b72-8b89-4d80d025448f/sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c [2019-11-26 02:18:52,990 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_15832e7c-29ce-4b72-8b89-4d80d025448f/bin/utaipan/data/ddbc89cfa/1615c62168a24edabfaa066a39e93415/FLAG0d16afa14 [2019-11-26 02:18:53,000 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_15832e7c-29ce-4b72-8b89-4d80d025448f/bin/utaipan/data/ddbc89cfa/1615c62168a24edabfaa066a39e93415 [2019-11-26 02:18:53,002 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:18:53,003 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:18:53,004 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:18:53,004 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:18:53,012 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:18:53,013 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:18:53" (1/1) ... [2019-11-26 02:18:53,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d0b4f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:18:53, skipping insertion in model container [2019-11-26 02:18:53,016 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:18:53" (1/1) ... [2019-11-26 02:18:53,023 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:18:53,039 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:18:53,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:18:53,349 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:18:53,371 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:18:53,385 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:18:53,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:18:53 WrapperNode [2019-11-26 02:18:53,386 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:18:53,387 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:18:53,387 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:18:53,387 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:18:53,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:18:53" (1/1) ... [2019-11-26 02:18:53,404 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:18:53" (1/1) ... [2019-11-26 02:18:53,422 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:18:53,423 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:18:53,423 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:18:53,423 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:18:53,432 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:18:53" (1/1) ... [2019-11-26 02:18:53,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:18:53" (1/1) ... [2019-11-26 02:18:53,446 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:18:53" (1/1) ... [2019-11-26 02:18:53,447 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:18:53" (1/1) ... [2019-11-26 02:18:53,455 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:18:53" (1/1) ... [2019-11-26 02:18:53,464 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:18:53" (1/1) ... [2019-11-26 02:18:53,471 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:18:53" (1/1) ... [2019-11-26 02:18:53,473 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:18:53,474 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:18:53,475 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:18:53,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:18:53,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:18:53" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_15832e7c-29ce-4b72-8b89-4d80d025448f/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 [2019-11-26 02:18:53,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-26 02:18:53,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:18:53,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:18:53,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-26 02:18:53,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-26 02:18:53,832 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:18:53,832 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-26 02:18:53,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:18:53 BoogieIcfgContainer [2019-11-26 02:18:53,833 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:18:53,834 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:18:53,834 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:18:53,837 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:18:53,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:18:53" (1/3) ... [2019-11-26 02:18:53,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34dc2270 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:18:53, skipping insertion in model container [2019-11-26 02:18:53,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:18:53" (2/3) ... [2019-11-26 02:18:53,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34dc2270 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:18:53, skipping insertion in model container [2019-11-26 02:18:53,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:18:53" (3/3) ... [2019-11-26 02:18:53,840 INFO L109 eAbstractionObserver]: Analyzing ICFG derefAfterFree2.c [2019-11-26 02:18:53,857 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:18:53,862 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2019-11-26 02:18:53,870 INFO L249 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2019-11-26 02:18:53,885 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:18:53,885 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-26 02:18:53,885 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:18:53,885 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:18:53,886 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:18:53,886 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:18:53,886 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:18:53,886 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:18:53,899 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-26 02:18:53,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-26 02:18:53,906 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:18:53,907 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-26 02:18:53,907 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:18:53,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:18:53,913 INFO L82 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2019-11-26 02:18:53,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:18:53,924 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [38090084] [2019-11-26 02:18:53,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_15832e7c-29ce-4b72-8b89-4d80d025448f/bin/utaipan/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:18:53,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:18:53,994 INFO L255 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-26 02:18:53,999 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:18:54,040 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-26 02:18:54,042 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:18:54,056 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:18:54,057 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:18:54,058 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-26 02:18:54,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:18:54,080 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:18:54,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:18:54,089 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [38090084] [2019-11-26 02:18:54,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:18:54,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-26 02:18:54,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101411980] [2019-11-26 02:18:54,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-26 02:18:54,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:18:54,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-26 02:18:54,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:18:54,109 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-11-26 02:18:54,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:18:54,177 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-11-26 02:18:54,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 02:18:54,178 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-11-26 02:18:54,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:18:54,185 INFO L225 Difference]: With dead ends: 27 [2019-11-26 02:18:54,185 INFO L226 Difference]: Without dead ends: 23 [2019-11-26 02:18:54,186 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:18:54,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-26 02:18:54,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2019-11-26 02:18:54,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-26 02:18:54,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2019-11-26 02:18:54,210 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 4 [2019-11-26 02:18:54,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:18:54,211 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2019-11-26 02:18:54,211 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-26 02:18:54,211 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2019-11-26 02:18:54,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-26 02:18:54,211 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:18:54,212 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-26 02:18:54,412 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:18:54,413 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:18:54,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:18:54,413 INFO L82 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2019-11-26 02:18:54,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:18:54,414 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [939794549] [2019-11-26 02:18:54,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_15832e7c-29ce-4b72-8b89-4d80d025448f/bin/utaipan/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:18:54,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:18:54,463 INFO L255 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:18:54,464 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:18:54,473 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-26 02:18:54,473 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:18:54,481 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:18:54,481 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:18:54,481 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-26 02:18:54,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:18:54,493 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:18:54,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:18:54,572 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [939794549] [2019-11-26 02:18:54,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:18:54,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-26 02:18:54,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062921986] [2019-11-26 02:18:54,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 02:18:54,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:18:54,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 02:18:54,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:18:54,575 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 4 states. [2019-11-26 02:18:54,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:18:54,814 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2019-11-26 02:18:54,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-26 02:18:54,815 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-11-26 02:18:54,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:18:54,816 INFO L225 Difference]: With dead ends: 28 [2019-11-26 02:18:54,816 INFO L226 Difference]: Without dead ends: 28 [2019-11-26 02:18:54,817 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:18:54,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-26 02:18:54,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2019-11-26 02:18:54,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-26 02:18:54,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-11-26 02:18:54,820 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 4 [2019-11-26 02:18:54,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:18:54,821 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-11-26 02:18:54,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 02:18:54,821 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-11-26 02:18:54,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-26 02:18:54,821 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:18:54,821 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:18:55,035 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:18:55,036 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:18:55,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:18:55,036 INFO L82 PathProgramCache]: Analyzing trace with hash -382889532, now seen corresponding path program 1 times [2019-11-26 02:18:55,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:18:55,037 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1760801374] [2019-11-26 02:18:55,037 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_15832e7c-29ce-4b72-8b89-4d80d025448f/bin/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:18:55,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:18:55,091 INFO L255 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-26 02:18:55,092 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:18:55,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:18:55,109 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:18:55,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:18:55,146 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1760801374] [2019-11-26 02:18:55,146 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371128694] [2019-11-26 02:18:55,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_15832e7c-29ce-4b72-8b89-4d80d025448f/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 [2019-11-26 02:18:55,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:18:55,184 INFO L255 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-26 02:18:55,185 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:18:55,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:18:55,187 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:18:55,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:18:55,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:18:55,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4] total 6 [2019-11-26 02:18:55,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963619141] [2019-11-26 02:18:55,191 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-26 02:18:55,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:18:55,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-26 02:18:55,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:18:55,192 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 6 states. [2019-11-26 02:18:55,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:18:55,311 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2019-11-26 02:18:55,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:18:55,312 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2019-11-26 02:18:55,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:18:55,313 INFO L225 Difference]: With dead ends: 33 [2019-11-26 02:18:55,313 INFO L226 Difference]: Without dead ends: 33 [2019-11-26 02:18:55,314 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-26 02:18:55,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-26 02:18:55,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-11-26 02:18:55,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-26 02:18:55,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-11-26 02:18:55,319 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 9 [2019-11-26 02:18:55,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:18:55,319 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-11-26 02:18:55,319 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-26 02:18:55,319 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-11-26 02:18:55,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-26 02:18:55,320 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:18:55,320 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1] [2019-11-26 02:18:55,723 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:18:55,723 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:18:55,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:18:55,723 INFO L82 PathProgramCache]: Analyzing trace with hash 810588748, now seen corresponding path program 1 times [2019-11-26 02:18:55,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:18:55,724 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1038202699] [2019-11-26 02:18:55,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_15832e7c-29ce-4b72-8b89-4d80d025448f/bin/utaipan/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:18:55,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:18:55,791 INFO L255 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-26 02:18:55,793 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:18:55,802 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-26 02:18:55,803 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:18:55,810 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:18:55,810 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:18:55,811 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-26 02:18:55,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:18:55,883 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:18:56,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:18:56,445 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1038202699] [2019-11-26 02:18:56,445 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944582201] [2019-11-26 02:18:56,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_15832e7c-29ce-4b72-8b89-4d80d025448f/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 [2019-11-26 02:18:56,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:18:56,502 INFO L255 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-26 02:18:56,503 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:18:56,511 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-26 02:18:56,511 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:18:56,517 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:18:56,518 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:18:56,518 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-26 02:18:56,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:18:56,528 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:18:56,711 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:18:56,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:18:56,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4, 4] total 8 [2019-11-26 02:18:56,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650389711] [2019-11-26 02:18:56,713 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-26 02:18:56,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:18:56,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-26 02:18:56,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-26 02:18:56,713 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 9 states. [2019-11-26 02:18:57,079 WARN L192 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2019-11-26 02:18:57,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:18:57,679 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2019-11-26 02:18:57,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-26 02:18:57,680 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-11-26 02:18:57,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:18:57,683 INFO L225 Difference]: With dead ends: 65 [2019-11-26 02:18:57,683 INFO L226 Difference]: Without dead ends: 65 [2019-11-26 02:18:57,684 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-11-26 02:18:57,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-26 02:18:57,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2019-11-26 02:18:57,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-26 02:18:57,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2019-11-26 02:18:57,693 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 12 [2019-11-26 02:18:57,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:18:57,693 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2019-11-26 02:18:57,693 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-26 02:18:57,694 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2019-11-26 02:18:57,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-26 02:18:57,694 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:18:57,694 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2019-11-26 02:18:58,097 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:18:58,097 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:18:58,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:18:58,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1461083186, now seen corresponding path program 1 times [2019-11-26 02:18:58,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:18:58,098 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [197313978] [2019-11-26 02:18:58,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_15832e7c-29ce-4b72-8b89-4d80d025448f/bin/utaipan/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:18:58,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:18:58,145 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-26 02:18:58,146 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:18:58,152 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-26 02:18:58,152 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:18:58,155 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-26 02:18:58,156 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [197313978] [2019-11-26 02:18:58,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:18:58,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-26 02:18:58,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28783332] [2019-11-26 02:18:58,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-26 02:18:58,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:18:58,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-26 02:18:58,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:18:58,158 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand 3 states. [2019-11-26 02:18:58,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:18:58,176 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2019-11-26 02:18:58,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 02:18:58,177 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-11-26 02:18:58,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:18:58,178 INFO L225 Difference]: With dead ends: 52 [2019-11-26 02:18:58,178 INFO L226 Difference]: Without dead ends: 52 [2019-11-26 02:18:58,178 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:18:58,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-26 02:18:58,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-11-26 02:18:58,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-26 02:18:58,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2019-11-26 02:18:58,184 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 18 [2019-11-26 02:18:58,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:18:58,185 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2019-11-26 02:18:58,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-26 02:18:58,185 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2019-11-26 02:18:58,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-26 02:18:58,186 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:18:58,186 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1] [2019-11-26 02:18:58,388 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:18:58,389 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:18:58,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:18:58,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1951061540, now seen corresponding path program 1 times [2019-11-26 02:18:58,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:18:58,390 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [379676268] [2019-11-26 02:18:58,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_15832e7c-29ce-4b72-8b89-4d80d025448f/bin/utaipan/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:18:58,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:18:58,432 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:18:58,433 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:18:58,464 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:18:58,465 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:18:58,515 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:18:58,515 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [379676268] [2019-11-26 02:18:58,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063476460] [2019-11-26 02:18:58,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_15832e7c-29ce-4b72-8b89-4d80d025448f/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:18:58,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:18:58,581 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:18:58,582 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:18:58,604 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:18:58,604 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:18:58,609 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:18:58,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:18:58,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6] total 10 [2019-11-26 02:18:58,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298153870] [2019-11-26 02:18:58,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-26 02:18:58,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:18:58,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-26 02:18:58,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-11-26 02:18:58,618 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 10 states. [2019-11-26 02:18:58,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:18:58,910 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2019-11-26 02:18:58,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-26 02:18:58,910 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2019-11-26 02:18:58,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:18:58,911 INFO L225 Difference]: With dead ends: 53 [2019-11-26 02:18:58,911 INFO L226 Difference]: Without dead ends: 53 [2019-11-26 02:18:58,912 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2019-11-26 02:18:58,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-26 02:18:58,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2019-11-26 02:18:58,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-26 02:18:58,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2019-11-26 02:18:58,918 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 19 [2019-11-26 02:18:58,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:18:58,919 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2019-11-26 02:18:58,919 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-26 02:18:58,919 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2019-11-26 02:18:58,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-26 02:18:58,919 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:18:58,920 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1] [2019-11-26 02:18:59,320 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:18:59,321 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:18:59,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:18:59,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1922951525, now seen corresponding path program 2 times [2019-11-26 02:18:59,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:18:59,322 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [673386511] [2019-11-26 02:18:59,322 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_15832e7c-29ce-4b72-8b89-4d80d025448f/bin/utaipan/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:18:59,396 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-26 02:18:59,396 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:18:59,397 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:18:59,398 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:18:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:18:59,460 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:18:59,584 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:18:59,585 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [673386511] [2019-11-26 02:18:59,585 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005716509] [2019-11-26 02:18:59,585 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_15832e7c-29ce-4b72-8b89-4d80d025448f/bin/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:18:59,631 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-26 02:18:59,631 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:18:59,634 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-26 02:18:59,635 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:18:59,645 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-26 02:18:59,645 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:18:59,658 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:18:59,659 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:18:59,659 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-26 02:18:59,739 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2019-11-26 02:18:59,739 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:18:59,752 INFO L567 ElimStorePlain]: treesize reduction 15, result has 31.8 percent of original size [2019-11-26 02:18:59,752 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:18:59,752 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:7 [2019-11-26 02:18:59,792 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:18:59,792 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:19:00,195 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:19:00,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:19:00,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9, 9] total 22 [2019-11-26 02:19:00,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142077170] [2019-11-26 02:19:00,196 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-26 02:19:00,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:19:00,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-26 02:19:00,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2019-11-26 02:19:00,197 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand 22 states. [2019-11-26 02:19:01,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:19:01,045 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2019-11-26 02:19:01,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-26 02:19:01,046 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2019-11-26 02:19:01,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:19:01,046 INFO L225 Difference]: With dead ends: 67 [2019-11-26 02:19:01,047 INFO L226 Difference]: Without dead ends: 67 [2019-11-26 02:19:01,047 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=272, Invalid=484, Unknown=0, NotChecked=0, Total=756 [2019-11-26 02:19:01,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-26 02:19:01,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2019-11-26 02:19:01,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-26 02:19:01,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2019-11-26 02:19:01,052 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 21 [2019-11-26 02:19:01,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:19:01,052 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2019-11-26 02:19:01,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-26 02:19:01,053 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2019-11-26 02:19:01,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-26 02:19:01,053 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:19:01,053 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1] [2019-11-26 02:19:01,457 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:19:01,458 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:19:01,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:19:01,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1156599646, now seen corresponding path program 2 times [2019-11-26 02:19:01,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:19:01,459 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [34351519] [2019-11-26 02:19:01,459 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_15832e7c-29ce-4b72-8b89-4d80d025448f/bin/utaipan/cvc4 Starting monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:19:01,499 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-26 02:19:01,500 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:19:01,501 INFO L255 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-26 02:19:01,502 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:19:01,520 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-26 02:19:01,520 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:19:01,528 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-26 02:19:01,528 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [34351519] [2019-11-26 02:19:01,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:19:01,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2019-11-26 02:19:01,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952901965] [2019-11-26 02:19:01,529 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:19:01,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:19:01,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:19:01,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:19:01,530 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 5 states. [2019-11-26 02:19:01,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:19:01,549 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2019-11-26 02:19:01,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-26 02:19:01,550 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2019-11-26 02:19:01,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:19:01,551 INFO L225 Difference]: With dead ends: 63 [2019-11-26 02:19:01,551 INFO L226 Difference]: Without dead ends: 63 [2019-11-26 02:19:01,551 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:19:01,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-26 02:19:01,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-11-26 02:19:01,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-26 02:19:01,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2019-11-26 02:19:01,556 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 27 [2019-11-26 02:19:01,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:19:01,556 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2019-11-26 02:19:01,556 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:19:01,556 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2019-11-26 02:19:01,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-26 02:19:01,557 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:19:01,557 INFO L410 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1] [2019-11-26 02:19:01,758 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:19:01,758 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:19:01,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:19:01,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1495096408, now seen corresponding path program 2 times [2019-11-26 02:19:01,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:19:01,759 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1906287540] [2019-11-26 02:19:01,759 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_15832e7c-29ce-4b72-8b89-4d80d025448f/bin/utaipan/cvc4 Starting monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:19:01,809 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-26 02:19:01,809 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:19:01,810 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-26 02:19:01,811 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:19:01,857 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 17 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:19:01,857 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:19:01,887 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 17 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:19:01,887 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1906287540] [2019-11-26 02:19:01,887 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259474349] [2019-11-26 02:19:01,888 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_15832e7c-29ce-4b72-8b89-4d80d025448f/bin/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:19:01,956 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-26 02:19:01,956 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:19:01,962 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-26 02:19:01,964 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:19:01,971 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-26 02:19:01,972 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:19:01,979 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:19:01,980 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:19:01,980 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-26 02:19:02,111 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2019-11-26 02:19:02,112 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:19:02,127 INFO L567 ElimStorePlain]: treesize reduction 15, result has 37.5 percent of original size [2019-11-26 02:19:02,127 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:19:02,127 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:9 [2019-11-26 02:19:02,179 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 17 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:19:02,180 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:19:02,751 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 17 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:19:02,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:19:02,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 10, 10] total 22 [2019-11-26 02:19:02,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738601075] [2019-11-26 02:19:02,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-26 02:19:02,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:19:02,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-26 02:19:02,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2019-11-26 02:19:02,753 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand 22 states. [2019-11-26 02:19:03,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:19:03,138 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2019-11-26 02:19:03,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-26 02:19:03,139 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 28 [2019-11-26 02:19:03,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:19:03,139 INFO L225 Difference]: With dead ends: 52 [2019-11-26 02:19:03,139 INFO L226 Difference]: Without dead ends: 52 [2019-11-26 02:19:03,140 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 83 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2019-11-26 02:19:03,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-26 02:19:03,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-11-26 02:19:03,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-26 02:19:03,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-11-26 02:19:03,145 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 28 [2019-11-26 02:19:03,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:19:03,145 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-11-26 02:19:03,145 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-26 02:19:03,146 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-11-26 02:19:03,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-26 02:19:03,146 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:19:03,147 INFO L410 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:19:03,548 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt --rewrite-divk,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:19:03,549 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:19:03,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:19:03,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1418335515, now seen corresponding path program 1 times [2019-11-26 02:19:03,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:19:03,549 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1317401377] [2019-11-26 02:19:03,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_15832e7c-29ce-4b72-8b89-4d80d025448f/bin/utaipan/cvc4 Starting monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:19:03,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:19:03,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:19:03,862 INFO L174 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2019-11-26 02:19:03,863 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-26 02:19:04,063 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:19:04,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:19:04 BoogieIcfgContainer [2019-11-26 02:19:04,092 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:19:04,092 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:19:04,092 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:19:04,093 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:19:04,093 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:18:53" (3/4) ... [2019-11-26 02:19:04,095 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-26 02:19:04,158 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_15832e7c-29ce-4b72-8b89-4d80d025448f/bin/utaipan/witness.graphml [2019-11-26 02:19:04,158 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:19:04,159 INFO L168 Benchmark]: Toolchain (without parser) took 11156.20 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 170.9 MB). Free memory was 943.4 MB in the beginning and 1.2 GB in the end (delta: -226.7 MB). Peak memory consumption was 213.1 MB. Max. memory is 11.5 GB. [2019-11-26 02:19:04,160 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:19:04,160 INFO L168 Benchmark]: CACSL2BoogieTranslator took 382.06 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.2 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -196.7 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:19:04,161 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.08 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:19:04,161 INFO L168 Benchmark]: Boogie Preprocessor took 50.86 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:19:04,162 INFO L168 Benchmark]: RCFGBuilder took 359.22 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:19:04,162 INFO L168 Benchmark]: TraceAbstraction took 10257.89 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 875.5 MB in the end (delta: 240.8 MB). Peak memory consumption was 240.8 MB. Max. memory is 11.5 GB. [2019-11-26 02:19:04,163 INFO L168 Benchmark]: Witness Printer took 65.89 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 25.7 MB). Free memory was 875.5 MB in the beginning and 1.2 GB in the end (delta: -294.6 MB). Peak memory consumption was 8.2 kB. Max. memory is 11.5 GB. [2019-11-26 02:19:04,165 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 382.06 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.2 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -196.7 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 36.08 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 50.86 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 359.22 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 10257.89 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 875.5 MB in the end (delta: 240.8 MB). Peak memory consumption was 240.8 MB. Max. memory is 11.5 GB. * Witness Printer took 65.89 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 25.7 MB). Free memory was 875.5 MB in the beginning and 1.2 GB in the end (delta: -294.6 MB). Peak memory consumption was 8.2 kB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 9]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L6] int* p = malloc(10 * sizeof(int)); [L8] int i = 0; [L8] COND TRUE i < 10 [L9] p[i] = 1 [L10] COND FALSE !(i == 5) [L8] i++ [L8] COND TRUE i < 10 [L9] p[i] = 1 [L10] COND FALSE !(i == 5) [L8] i++ [L8] COND TRUE i < 10 [L9] p[i] = 1 [L10] COND FALSE !(i == 5) [L8] i++ [L8] COND TRUE i < 10 [L9] p[i] = 1 [L10] COND FALSE !(i == 5) [L8] i++ [L8] COND TRUE i < 10 [L9] p[i] = 1 [L10] COND FALSE !(i == 5) [L8] i++ [L8] COND TRUE i < 10 [L9] p[i] = 1 [L10] COND TRUE i == 5 [L11] free(p) [L11] free(p) [L11] free(p) [L8] i++ [L8] COND TRUE i < 10 [L9] p[i] = 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 6 error locations. Result: UNSAFE, OverallTime: 10.2s, OverallIterations: 10, TraceHistogramMax: 7, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 84 SDtfs, 335 SDslu, 186 SDs, 0 SdLazy, 801 SolverSat, 76 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 449 GetRequests, 356 SyntacticMatches, 12 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 3.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=7, 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, 9 MinimizatonAttempts, 27 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 262 NumberOfCodeBlocks, 242 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 434 ConstructedInterpolants, 0 QuantifiedInterpolants, 71604 SizeOfPredicates, 33 NumberOfNonLiveVariables, 563 ConjunctsInSsa, 89 ConjunctsInUnsatCore, 28 InterpolantComputations, 8 PerfectInterpolantSequences, 220/672 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...