./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/realloc1.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_e72734f4-94a6-4c40-ab5b-bc034d2b6fd5/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_e72734f4-94a6-4c40-ab5b-bc034d2b6fd5/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e72734f4-94a6-4c40-ab5b-bc034d2b6fd5/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e72734f4-94a6-4c40-ab5b-bc034d2b6fd5/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/realloc1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_e72734f4-94a6-4c40-ab5b-bc034d2b6fd5/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e72734f4-94a6-4c40-ab5b-bc034d2b6fd5/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 937cfa07aecfb3a07a3e6e685c2e5e481fbe44b8 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 03:01:27,373 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 03:01:27,374 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 03:01:27,389 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 03:01:27,390 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 03:01:27,391 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 03:01:27,393 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 03:01:27,401 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 03:01:27,405 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 03:01:27,408 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 03:01:27,409 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 03:01:27,410 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 03:01:27,411 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 03:01:27,413 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 03:01:27,413 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 03:01:27,414 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 03:01:27,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 03:01:27,415 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 03:01:27,417 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 03:01:27,421 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 03:01:27,425 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 03:01:27,428 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 03:01:27,430 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 03:01:27,431 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 03:01:27,435 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 03:01:27,435 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 03:01:27,436 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 03:01:27,437 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 03:01:27,438 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 03:01:27,439 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 03:01:27,439 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 03:01:27,440 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 03:01:27,440 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 03:01:27,441 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 03:01:27,442 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 03:01:27,442 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 03:01:27,443 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 03:01:27,443 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 03:01:27,443 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 03:01:27,444 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 03:01:27,445 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 03:01:27,446 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e72734f4-94a6-4c40-ab5b-bc034d2b6fd5/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2019-11-26 03:01:27,464 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 03:01:27,464 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 03:01:27,465 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 03:01:27,465 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 03:01:27,465 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 03:01:27,465 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 03:01:27,465 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 03:01:27,466 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 03:01:27,466 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 03:01:27,466 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-26 03:01:27,471 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-26 03:01:27,471 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 03:01:27,471 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 03:01:27,472 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-26 03:01:27,472 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 03:01:27,472 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 03:01:27,472 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 03:01:27,473 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-26 03:01:27,473 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-26 03:01:27,474 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-26 03:01:27,474 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 03:01:27,476 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-26 03:01:27,476 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-26 03:01:27,478 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-26 03:01:27,478 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 03:01:27,478 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-26 03:01:27,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 03:01:27,479 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-26 03:01:27,479 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 03:01:27,479 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 03:01:27,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 03:01:27,480 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 03:01:27,480 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 03:01:27,480 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-11-26 03:01:27,481 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-26 03:01:27,481 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 03:01:27,481 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_e72734f4-94a6-4c40-ab5b-bc034d2b6fd5/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 -> 937cfa07aecfb3a07a3e6e685c2e5e481fbe44b8 [2019-11-26 03:01:27,609 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 03:01:27,621 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 03:01:27,625 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 03:01:27,628 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 03:01:27,628 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 03:01:27,629 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e72734f4-94a6-4c40-ab5b-bc034d2b6fd5/bin/utaipan/../../sv-benchmarks/c/memsafety-ext3/realloc1.c [2019-11-26 03:01:27,700 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e72734f4-94a6-4c40-ab5b-bc034d2b6fd5/bin/utaipan/data/f01ee09c0/c2111fdb118442f29d06ee320789a593/FLAGefb9a952b [2019-11-26 03:01:28,081 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 03:01:28,082 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e72734f4-94a6-4c40-ab5b-bc034d2b6fd5/sv-benchmarks/c/memsafety-ext3/realloc1.c [2019-11-26 03:01:28,087 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e72734f4-94a6-4c40-ab5b-bc034d2b6fd5/bin/utaipan/data/f01ee09c0/c2111fdb118442f29d06ee320789a593/FLAGefb9a952b [2019-11-26 03:01:28,450 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e72734f4-94a6-4c40-ab5b-bc034d2b6fd5/bin/utaipan/data/f01ee09c0/c2111fdb118442f29d06ee320789a593 [2019-11-26 03:01:28,454 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 03:01:28,455 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 03:01:28,456 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 03:01:28,456 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 03:01:28,459 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 03:01:28,460 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 03:01:28" (1/1) ... [2019-11-26 03:01:28,462 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@523a51bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:28, skipping insertion in model container [2019-11-26 03:01:28,462 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 03:01:28" (1/1) ... [2019-11-26 03:01:28,467 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 03:01:28,481 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 03:01:28,712 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 03:01:28,727 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 03:01:28,741 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 03:01:28,756 INFO L205 MainTranslator]: Completed translation [2019-11-26 03:01:28,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:28 WrapperNode [2019-11-26 03:01:28,756 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 03:01:28,757 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 03:01:28,757 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 03:01:28,757 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 03:01:28,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:28" (1/1) ... [2019-11-26 03:01:28,773 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:28" (1/1) ... [2019-11-26 03:01:28,789 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 03:01:28,790 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 03:01:28,790 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 03:01:28,790 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 03:01:28,796 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:28" (1/1) ... [2019-11-26 03:01:28,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:28" (1/1) ... [2019-11-26 03:01:28,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:28" (1/1) ... [2019-11-26 03:01:28,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:28" (1/1) ... [2019-11-26 03:01:28,805 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:28" (1/1) ... [2019-11-26 03:01:28,808 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:28" (1/1) ... [2019-11-26 03:01:28,810 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:28" (1/1) ... [2019-11-26 03:01:28,813 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 03:01:28,814 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 03:01:28,814 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 03:01:28,814 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 03:01:28,815 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:28" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e72734f4-94a6-4c40-ab5b-bc034d2b6fd5/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 03:01:28,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-26 03:01:28,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2019-11-26 03:01:28,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 03:01:28,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 03:01:28,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2019-11-26 03:01:28,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-26 03:01:29,106 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 03:01:29,106 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-26 03:01:29,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 03:01:29 BoogieIcfgContainer [2019-11-26 03:01:29,108 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 03:01:29,108 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 03:01:29,109 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 03:01:29,111 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 03:01:29,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 03:01:28" (1/3) ... [2019-11-26 03:01:29,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c78a3bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 03:01:29, skipping insertion in model container [2019-11-26 03:01:29,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 03:01:28" (2/3) ... [2019-11-26 03:01:29,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c78a3bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 03:01:29, skipping insertion in model container [2019-11-26 03:01:29,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 03:01:29" (3/3) ... [2019-11-26 03:01:29,123 INFO L109 eAbstractionObserver]: Analyzing ICFG realloc1.c [2019-11-26 03:01:29,131 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 03:01:29,136 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2019-11-26 03:01:29,152 INFO L249 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2019-11-26 03:01:29,175 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 03:01:29,175 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-26 03:01:29,175 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 03:01:29,175 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 03:01:29,175 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 03:01:29,176 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 03:01:29,176 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 03:01:29,176 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 03:01:29,189 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-11-26 03:01:29,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-26 03:01:29,195 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 03:01:29,195 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-26 03:01:29,196 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 03:01:29,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 03:01:29,200 INFO L82 PathProgramCache]: Analyzing trace with hash 926021, now seen corresponding path program 1 times [2019-11-26 03:01:29,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 03:01:29,208 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [113721678] [2019-11-26 03:01:29,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e72734f4-94a6-4c40-ab5b-bc034d2b6fd5/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 03:01:29,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 03:01:29,281 INFO L255 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-26 03:01:29,284 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 03:01:29,293 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 03:01:29,293 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 03:01:29,294 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 03:01:29,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [113721678] [2019-11-26 03:01:29,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 03:01:29,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-26 03:01:29,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109267102] [2019-11-26 03:01:29,299 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-26 03:01:29,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 03:01:29,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-26 03:01:29,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-26 03:01:29,311 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2019-11-26 03:01:29,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 03:01:29,321 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2019-11-26 03:01:29,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-26 03:01:29,322 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2019-11-26 03:01:29,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 03:01:29,329 INFO L225 Difference]: With dead ends: 25 [2019-11-26 03:01:29,329 INFO L226 Difference]: Without dead ends: 23 [2019-11-26 03:01:29,331 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-26 03:01:29,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-26 03:01:29,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-26 03:01:29,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-26 03:01:29,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-11-26 03:01:29,353 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 4 [2019-11-26 03:01:29,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 03:01:29,354 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-11-26 03:01:29,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-26 03:01:29,354 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-11-26 03:01:29,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-26 03:01:29,354 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 03:01:29,355 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-26 03:01:29,556 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 03:01:29,556 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 03:01:29,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 03:01:29,557 INFO L82 PathProgramCache]: Analyzing trace with hash 925711, now seen corresponding path program 1 times [2019-11-26 03:01:29,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 03:01:29,557 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [590243604] [2019-11-26 03:01:29,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e72734f4-94a6-4c40-ab5b-bc034d2b6fd5/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 03:01:29,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 03:01:29,601 INFO L255 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-26 03:01:29,601 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 03:01:29,615 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 03:01:29,616 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 03:01:29,621 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 03:01:29,621 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [590243604] [2019-11-26 03:01:29,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 03:01:29,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-26 03:01:29,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465287225] [2019-11-26 03:01:29,623 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-26 03:01:29,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 03:01:29,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-26 03:01:29,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 03:01:29,624 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 3 states. [2019-11-26 03:01:29,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 03:01:29,654 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2019-11-26 03:01:29,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 03:01:29,655 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-11-26 03:01:29,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 03:01:29,655 INFO L225 Difference]: With dead ends: 25 [2019-11-26 03:01:29,655 INFO L226 Difference]: Without dead ends: 25 [2019-11-26 03:01:29,656 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 03:01:29,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-26 03:01:29,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2019-11-26 03:01:29,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-26 03:01:29,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-11-26 03:01:29,660 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 4 [2019-11-26 03:01:29,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 03:01:29,660 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-11-26 03:01:29,660 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-26 03:01:29,661 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-11-26 03:01:29,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-26 03:01:29,661 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 03:01:29,661 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-26 03:01:29,863 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 03:01:29,866 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 03:01:29,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 03:01:29,867 INFO L82 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2019-11-26 03:01:29,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 03:01:29,868 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2020612695] [2019-11-26 03:01:29,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e72734f4-94a6-4c40-ab5b-bc034d2b6fd5/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 03:01:29,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 03:01:29,934 INFO L255 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-26 03:01:29,934 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 03:01:29,983 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 03:01:29,983 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 03:01:29,988 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 03:01:29,988 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 03:01:29,989 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-26 03:01:29,995 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 03:01:29,995 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 03:01:29,998 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 03:01:29,998 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2020612695] [2019-11-26 03:01:29,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 03:01:29,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-26 03:01:29,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658723743] [2019-11-26 03:01:29,999 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-26 03:01:29,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 03:01:30,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-26 03:01:30,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 03:01:30,000 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 3 states. [2019-11-26 03:01:30,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 03:01:30,069 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-11-26 03:01:30,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 03:01:30,069 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-11-26 03:01:30,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 03:01:30,070 INFO L225 Difference]: With dead ends: 24 [2019-11-26 03:01:30,070 INFO L226 Difference]: Without dead ends: 24 [2019-11-26 03:01:30,071 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 03:01:30,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-26 03:01:30,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2019-11-26 03:01:30,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-26 03:01:30,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-11-26 03:01:30,074 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 4 [2019-11-26 03:01:30,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 03:01:30,074 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-11-26 03:01:30,074 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-26 03:01:30,075 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-11-26 03:01:30,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-26 03:01:30,075 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 03:01:30,075 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-26 03:01:30,281 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 03:01:30,282 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 03:01:30,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 03:01:30,282 INFO L82 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2019-11-26 03:01:30,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 03:01:30,283 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1270333757] [2019-11-26 03:01:30,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e72734f4-94a6-4c40-ab5b-bc034d2b6fd5/bin/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 03:01:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 03:01:30,333 INFO L255 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 03:01:30,333 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 03:01:30,343 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 03:01:30,343 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 03:01:30,357 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 03:01:30,357 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 03:01:30,357 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-26 03:01:30,382 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 03:01:30,382 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 03:01:30,450 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 03:01:30,451 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1270333757] [2019-11-26 03:01:30,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 03:01:30,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-26 03:01:30,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290439965] [2019-11-26 03:01:30,451 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 03:01:30,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 03:01:30,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 03:01:30,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-26 03:01:30,452 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2019-11-26 03:01:30,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 03:01:30,697 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2019-11-26 03:01:30,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-26 03:01:30,697 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-11-26 03:01:30,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 03:01:30,699 INFO L225 Difference]: With dead ends: 38 [2019-11-26 03:01:30,699 INFO L226 Difference]: Without dead ends: 38 [2019-11-26 03:01:30,699 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 03:01:30,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-26 03:01:30,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2019-11-26 03:01:30,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-26 03:01:30,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2019-11-26 03:01:30,704 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 4 [2019-11-26 03:01:30,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 03:01:30,704 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2019-11-26 03:01:30,705 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 03:01:30,705 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2019-11-26 03:01:30,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-26 03:01:30,705 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 03:01:30,705 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 03:01:30,907 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 03:01:30,908 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 03:01:30,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 03:01:30,910 INFO L82 PathProgramCache]: Analyzing trace with hash -392422941, now seen corresponding path program 1 times [2019-11-26 03:01:30,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 03:01:30,912 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [744654917] [2019-11-26 03:01:30,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e72734f4-94a6-4c40-ab5b-bc034d2b6fd5/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 03:01:30,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 03:01:30,985 INFO L255 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-26 03:01:30,986 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 03:01:31,002 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 03:01:31,003 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 03:01:31,030 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 03:01:31,031 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [744654917] [2019-11-26 03:01:31,031 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981025846] [2019-11-26 03:01:31,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e72734f4-94a6-4c40-ab5b-bc034d2b6fd5/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 03:01:31,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 03:01:31,075 INFO L255 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-26 03:01:31,076 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 03:01:31,079 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 03:01:31,079 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 03:01:31,081 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 03:01:31,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 03:01:31,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4] total 6 [2019-11-26 03:01:31,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866842115] [2019-11-26 03:01:31,089 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-26 03:01:31,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 03:01:31,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-26 03:01:31,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-26 03:01:31,090 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 6 states. [2019-11-26 03:01:31,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 03:01:31,182 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2019-11-26 03:01:31,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 03:01:31,183 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2019-11-26 03:01:31,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 03:01:31,184 INFO L225 Difference]: With dead ends: 34 [2019-11-26 03:01:31,184 INFO L226 Difference]: Without dead ends: 34 [2019-11-26 03:01:31,185 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 03:01:31,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-26 03:01:31,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-11-26 03:01:31,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-26 03:01:31,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2019-11-26 03:01:31,189 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 9 [2019-11-26 03:01:31,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 03:01:31,190 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2019-11-26 03:01:31,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-26 03:01:31,190 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2019-11-26 03:01:31,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-26 03:01:31,191 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 03:01:31,191 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1] [2019-11-26 03:01:31,594 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 03:01:31,594 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 03:01:31,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 03:01:31,594 INFO L82 PathProgramCache]: Analyzing trace with hash 276944844, now seen corresponding path program 1 times [2019-11-26 03:01:31,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 03:01:31,595 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [987799662] [2019-11-26 03:01:31,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e72734f4-94a6-4c40-ab5b-bc034d2b6fd5/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 03:01:31,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 03:01:31,657 INFO L255 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-26 03:01:31,658 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 03:01:31,670 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 03:01:31,670 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 03:01:31,683 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 03:01:31,683 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 03:01:31,684 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-26 03:01:31,746 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 03:01:31,746 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 03:01:32,263 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 03:01:32,263 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [987799662] [2019-11-26 03:01:32,264 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583906995] [2019-11-26 03:01:32,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e72734f4-94a6-4c40-ab5b-bc034d2b6fd5/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 03:01:32,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 03:01:32,315 INFO L255 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-26 03:01:32,317 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 03:01:32,326 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 03:01:32,326 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 03:01:32,333 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 03:01:32,334 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 03:01:32,334 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-26 03:01:32,376 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 03:01:32,376 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 03:01:33,226 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 03:01:33,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 03:01:33,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4, 7] total 13 [2019-11-26 03:01:33,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521585319] [2019-11-26 03:01:33,228 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-26 03:01:33,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 03:01:33,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-26 03:01:33,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2019-11-26 03:01:33,229 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 14 states. [2019-11-26 03:01:33,524 WARN L192 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2019-11-26 03:01:35,651 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2019-11-26 03:01:36,343 WARN L192 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-11-26 03:01:36,717 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2019-11-26 03:01:37,381 WARN L192 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2019-11-26 03:01:37,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 03:01:37,515 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2019-11-26 03:01:37,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-26 03:01:37,517 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-11-26 03:01:37,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 03:01:37,518 INFO L225 Difference]: With dead ends: 69 [2019-11-26 03:01:37,518 INFO L226 Difference]: Without dead ends: 69 [2019-11-26 03:01:37,521 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2019-11-26 03:01:37,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-26 03:01:37,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 42. [2019-11-26 03:01:37,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-26 03:01:37,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-11-26 03:01:37,526 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 12 [2019-11-26 03:01:37,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 03:01:37,527 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-11-26 03:01:37,527 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-26 03:01:37,527 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-11-26 03:01:37,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-26 03:01:37,527 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 03:01:37,528 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1] [2019-11-26 03:01:37,928 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 03:01:37,929 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 03:01:37,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 03:01:37,929 INFO L82 PathProgramCache]: Analyzing trace with hash 519338618, now seen corresponding path program 2 times [2019-11-26 03:01:37,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 03:01:37,930 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [705305775] [2019-11-26 03:01:37,930 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e72734f4-94a6-4c40-ab5b-bc034d2b6fd5/bin/utaipan/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 03:01:37,987 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-26 03:01:37,987 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 03:01:37,988 INFO L255 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-26 03:01:37,989 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 03:01:38,019 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-26 03:01:38,023 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 03:01:38,033 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-26 03:01:38,033 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [705305775] [2019-11-26 03:01:38,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 03:01:38,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2019-11-26 03:01:38,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016699495] [2019-11-26 03:01:38,034 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 03:01:38,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 03:01:38,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 03:01:38,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-26 03:01:38,035 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 5 states. [2019-11-26 03:01:38,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 03:01:38,101 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2019-11-26 03:01:38,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-26 03:01:38,103 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-11-26 03:01:38,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 03:01:38,104 INFO L225 Difference]: With dead ends: 44 [2019-11-26 03:01:38,104 INFO L226 Difference]: Without dead ends: 44 [2019-11-26 03:01:38,105 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 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 03:01:38,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-26 03:01:38,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2019-11-26 03:01:38,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-26 03:01:38,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-11-26 03:01:38,109 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 21 [2019-11-26 03:01:38,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 03:01:38,109 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-11-26 03:01:38,112 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 03:01:38,112 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-11-26 03:01:38,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-26 03:01:38,113 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 03:01:38,113 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 03:01:38,317 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 03:01:38,318 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 03:01:38,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 03:01:38,318 INFO L82 PathProgramCache]: Analyzing trace with hash 868207325, now seen corresponding path program 1 times [2019-11-26 03:01:38,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 03:01:38,318 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2075131986] [2019-11-26 03:01:38,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e72734f4-94a6-4c40-ab5b-bc034d2b6fd5/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 03:01:38,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 03:01:38,388 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 03:01:38,389 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 03:01:38,444 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 03:01:38,444 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 03:01:38,547 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 03:01:38,547 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2075131986] [2019-11-26 03:01:38,548 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834544001] [2019-11-26 03:01:38,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e72734f4-94a6-4c40-ab5b-bc034d2b6fd5/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 03:01:38,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 03:01:38,600 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-26 03:01:38,601 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 03:01:38,684 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 03:01:38,684 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 03:01:39,020 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 03:01:39,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 03:01:39,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 9] total 21 [2019-11-26 03:01:39,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216952919] [2019-11-26 03:01:39,021 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-26 03:01:39,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 03:01:39,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-26 03:01:39,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2019-11-26 03:01:39,022 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 21 states. [2019-11-26 03:01:39,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 03:01:39,722 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2019-11-26 03:01:39,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-26 03:01:39,724 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 23 [2019-11-26 03:01:39,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 03:01:39,725 INFO L225 Difference]: With dead ends: 62 [2019-11-26 03:01:39,725 INFO L226 Difference]: Without dead ends: 62 [2019-11-26 03:01:39,725 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2019-11-26 03:01:39,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-26 03:01:39,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2019-11-26 03:01:39,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-26 03:01:39,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2019-11-26 03:01:39,730 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 23 [2019-11-26 03:01:39,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 03:01:39,731 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2019-11-26 03:01:39,731 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-26 03:01:39,731 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2019-11-26 03:01:39,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-26 03:01:39,731 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 03:01:39,732 INFO L410 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1] [2019-11-26 03:01:40,132 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 03:01:40,133 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 03:01:40,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 03:01:40,133 INFO L82 PathProgramCache]: Analyzing trace with hash -164588328, now seen corresponding path program 2 times [2019-11-26 03:01:40,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 03:01:40,133 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [389359998] [2019-11-26 03:01:40,133 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e72734f4-94a6-4c40-ab5b-bc034d2b6fd5/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 03:01:40,227 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-26 03:01:40,227 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 03:01:40,228 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-26 03:01:40,234 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 03:01:40,242 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 03:01:40,242 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 03:01:40,248 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 03:01:40,248 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 03:01:40,248 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-26 03:01:40,388 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 03:01:40,389 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 03:01:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 03:01:41,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [389359998] [2019-11-26 03:01:41,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766795396] [2019-11-26 03:01:41,830 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e72734f4-94a6-4c40-ab5b-bc034d2b6fd5/bin/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 03:01:41,875 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-26 03:01:41,875 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 03:01:41,878 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-26 03:01:41,879 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 03:01:41,885 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 03:01:41,885 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 03:01:41,891 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 03:01:41,891 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 03:01:41,891 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-26 03:01:41,974 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 03:01:41,974 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 03:01:44,138 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 03:01:44,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 03:01:44,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 11] total 23 [2019-11-26 03:01:44,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889030534] [2019-11-26 03:01:44,140 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-26 03:01:44,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 03:01:44,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-26 03:01:44,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2019-11-26 03:01:44,141 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 24 states. [2019-11-26 03:01:46,532 WARN L192 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2019-11-26 03:01:49,854 WARN L192 SmtUtils]: Spent 1.01 s on a formula simplification that was a NOOP. DAG size: 68 [2019-11-26 03:01:51,666 WARN L192 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2019-11-26 03:01:54,083 WARN L192 SmtUtils]: Spent 568.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2019-11-26 03:01:55,631 WARN L192 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2019-11-26 03:01:57,775 WARN L192 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2019-11-26 03:01:58,589 WARN L192 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2019-11-26 03:02:00,617 WARN L192 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2019-11-26 03:02:01,385 WARN L192 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2019-11-26 03:02:03,300 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2019-11-26 03:02:03,900 WARN L192 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2019-11-26 03:02:04,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 03:02:04,076 INFO L93 Difference]: Finished difference Result 109 states and 117 transitions. [2019-11-26 03:02:04,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-26 03:02:04,077 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2019-11-26 03:02:04,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 03:02:04,078 INFO L225 Difference]: With dead ends: 109 [2019-11-26 03:02:04,078 INFO L226 Difference]: Without dead ends: 109 [2019-11-26 03:02:04,079 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 80 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2019-11-26 03:02:04,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-11-26 03:02:04,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2019-11-26 03:02:04,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-26 03:02:04,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2019-11-26 03:02:04,086 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 28 [2019-11-26 03:02:04,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 03:02:04,087 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2019-11-26 03:02:04,087 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-26 03:02:04,087 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2019-11-26 03:02:04,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-26 03:02:04,088 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 03:02:04,089 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 03:02:04,489 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 03:02:04,490 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 03:02:04,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 03:02:04,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1707940107, now seen corresponding path program 2 times [2019-11-26 03:02:04,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 03:02:04,490 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1234646878] [2019-11-26 03:02:04,490 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e72734f4-94a6-4c40-ab5b-bc034d2b6fd5/bin/utaipan/cvc4 Starting monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 03:02:04,834 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-26 03:02:04,834 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2019-11-26 03:02:05,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 03:02:05,134 INFO L174 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2019-11-26 03:02:05,134 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-26 03:02:05,335 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 03:02:05,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 03:02:05 BoogieIcfgContainer [2019-11-26 03:02:05,375 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 03:02:05,375 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 03:02:05,375 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 03:02:05,375 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 03:02:05,376 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 03:01:29" (3/4) ... [2019-11-26 03:02:05,378 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-26 03:02:05,428 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_e72734f4-94a6-4c40-ab5b-bc034d2b6fd5/bin/utaipan/witness.graphml [2019-11-26 03:02:05,429 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 03:02:05,430 INFO L168 Benchmark]: Toolchain (without parser) took 36975.15 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 308.3 MB). Free memory was 940.8 MB in the beginning and 1.3 GB in the end (delta: -343.5 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 03:02:05,430 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 960.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 03:02:05,431 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.31 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 940.8 MB in the beginning and 1.1 GB in the end (delta: -185.4 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. [2019-11-26 03:02:05,431 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.72 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: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 11.5 GB. [2019-11-26 03:02:05,432 INFO L168 Benchmark]: Boogie Preprocessor took 23.75 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: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 11.5 GB. [2019-11-26 03:02:05,432 INFO L168 Benchmark]: RCFGBuilder took 293.86 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: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. [2019-11-26 03:02:05,433 INFO L168 Benchmark]: TraceAbstraction took 36266.28 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 174.6 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -187.2 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 03:02:05,433 INFO L168 Benchmark]: Witness Printer took 53.77 ms. Allocated memory is still 1.3 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 11.5 GB. [2019-11-26 03:02:05,435 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 960.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 300.31 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 940.8 MB in the beginning and 1.1 GB in the end (delta: -185.4 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 32.72 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: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 23.75 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: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 293.86 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: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 36266.28 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 174.6 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -187.2 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 53.77 ms. Allocated memory is still 1.3 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L8] char* p = malloc(10 * sizeof(int)); [L10] int i = 0; [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND FALSE !(i < 10) [L14] free(p) [L14] free(p) [L14] free(p) [L16] p[2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 locations, 8 error locations. Result: UNSAFE, OverallTime: 36.2s, OverallIterations: 10, TraceHistogramMax: 10, AutomataDifference: 25.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 136 SDtfs, 639 SDslu, 331 SDs, 0 SdLazy, 764 SolverSat, 92 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 12.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 359 GetRequests, 259 SyntacticMatches, 13 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 18.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=73occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 92 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 6.2s InterpolantComputationTime, 228 NumberOfCodeBlocks, 212 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 336 ConstructedInterpolants, 0 QuantifiedInterpolants, 99993 SizeOfPredicates, 25 NumberOfNonLiveVariables, 453 ConjunctsInSsa, 87 ConjunctsInUnsatCore, 26 InterpolantComputations, 10 PerfectInterpolantSequences, 56/492 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...