./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/getNumbers1-1.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_0f995dba-9ba4-46a4-8c29-a1ef08a54fc6/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_0f995dba-9ba4-46a4-8c29-a1ef08a54fc6/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_0f995dba-9ba4-46a4-8c29-a1ef08a54fc6/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_0f995dba-9ba4-46a4-8c29-a1ef08a54fc6/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/getNumbers1-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_0f995dba-9ba4-46a4-8c29-a1ef08a54fc6/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_0f995dba-9ba4-46a4-8c29-a1ef08a54fc6/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 1b1751fe95f9cf655681429038c1cde9e9c074e8 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-6b5699a [2019-11-26 02:43:18,067 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:43:18,069 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:43:18,084 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:43:18,085 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:43:18,086 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:43:18,088 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:43:18,097 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:43:18,101 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:43:18,105 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:43:18,106 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:43:18,107 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:43:18,107 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:43:18,109 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:43:18,110 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:43:18,111 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:43:18,112 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:43:18,113 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:43:18,115 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:43:18,118 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:43:18,122 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:43:18,125 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:43:18,126 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:43:18,127 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:43:18,130 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:43:18,131 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:43:18,131 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:43:18,132 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:43:18,133 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:43:18,133 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:43:18,134 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:43:18,134 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:43:18,135 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:43:18,136 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:43:18,137 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:43:18,137 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:43:18,137 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:43:18,137 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:43:18,138 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:43:18,138 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:43:18,139 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:43:18,140 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_0f995dba-9ba4-46a4-8c29-a1ef08a54fc6/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2019-11-26 02:43:18,165 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:43:18,165 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:43:18,166 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:43:18,166 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:43:18,166 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:43:18,166 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:43:18,167 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:43:18,167 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:43:18,167 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:43:18,167 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-26 02:43:18,168 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-26 02:43:18,168 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:43:18,168 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:43:18,168 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-26 02:43:18,168 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:43:18,169 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:43:18,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:43:18,169 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-26 02:43:18,169 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-26 02:43:18,169 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-26 02:43:18,169 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:43:18,170 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-26 02:43:18,170 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-26 02:43:18,170 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-26 02:43:18,170 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:43:18,170 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-26 02:43:18,170 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:43:18,171 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-26 02:43:18,171 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:43:18,171 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:43:18,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:43:18,171 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:43:18,172 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:43:18,172 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-11-26 02:43:18,172 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-26 02:43:18,172 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:43:18,172 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_0f995dba-9ba4-46a4-8c29-a1ef08a54fc6/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 -> 1b1751fe95f9cf655681429038c1cde9e9c074e8 [2019-11-26 02:43:18,350 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:43:18,363 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:43:18,366 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:43:18,367 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:43:18,367 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:43:18,368 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_0f995dba-9ba4-46a4-8c29-a1ef08a54fc6/bin/utaipan/../../sv-benchmarks/c/memsafety-ext3/getNumbers1-1.c [2019-11-26 02:43:18,424 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0f995dba-9ba4-46a4-8c29-a1ef08a54fc6/bin/utaipan/data/e07cdec07/ee9b67df2ad441adb6718215c3c880f6/FLAGd09e86ef9 [2019-11-26 02:43:18,805 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:43:18,806 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_0f995dba-9ba4-46a4-8c29-a1ef08a54fc6/sv-benchmarks/c/memsafety-ext3/getNumbers1-1.c [2019-11-26 02:43:18,811 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0f995dba-9ba4-46a4-8c29-a1ef08a54fc6/bin/utaipan/data/e07cdec07/ee9b67df2ad441adb6718215c3c880f6/FLAGd09e86ef9 [2019-11-26 02:43:19,229 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_0f995dba-9ba4-46a4-8c29-a1ef08a54fc6/bin/utaipan/data/e07cdec07/ee9b67df2ad441adb6718215c3c880f6 [2019-11-26 02:43:19,238 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:43:19,240 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:43:19,240 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:43:19,241 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:43:19,244 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:43:19,249 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:43:19" (1/1) ... [2019-11-26 02:43:19,251 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2591e8ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:19, skipping insertion in model container [2019-11-26 02:43:19,252 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:43:19" (1/1) ... [2019-11-26 02:43:19,258 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:43:19,276 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:43:19,539 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:43:19,560 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:43:19,576 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:43:19,595 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:43:19,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:19 WrapperNode [2019-11-26 02:43:19,596 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:43:19,596 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:43:19,596 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:43:19,597 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:43:19,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:19" (1/1) ... [2019-11-26 02:43:19,624 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:19" (1/1) ... [2019-11-26 02:43:19,639 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:43:19,639 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:43:19,639 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:43:19,640 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:43:19,648 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:19" (1/1) ... [2019-11-26 02:43:19,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:19" (1/1) ... [2019-11-26 02:43:19,650 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:19" (1/1) ... [2019-11-26 02:43:19,653 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:19" (1/1) ... [2019-11-26 02:43:19,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:19" (1/1) ... [2019-11-26 02:43:19,680 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:19" (1/1) ... [2019-11-26 02:43:19,683 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:19" (1/1) ... [2019-11-26 02:43:19,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:43:19,686 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:43:19,686 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:43:19,686 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:43:19,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:19" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0f995dba-9ba4-46a4-8c29-a1ef08a54fc6/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:43:19,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-26 02:43:19,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:43:19,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:43:19,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2019-11-26 02:43:19,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-26 02:43:19,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-26 02:43:19,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-26 02:43:20,084 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:43:20,085 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-26 02:43:20,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:43:20 BoogieIcfgContainer [2019-11-26 02:43:20,086 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:43:20,087 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:43:20,087 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:43:20,091 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:43:20,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:43:19" (1/3) ... [2019-11-26 02:43:20,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41c92487 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:43:20, skipping insertion in model container [2019-11-26 02:43:20,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:43:19" (2/3) ... [2019-11-26 02:43:20,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41c92487 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:43:20, skipping insertion in model container [2019-11-26 02:43:20,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:43:20" (3/3) ... [2019-11-26 02:43:20,093 INFO L109 eAbstractionObserver]: Analyzing ICFG getNumbers1-1.c [2019-11-26 02:43:20,102 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:43:20,107 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2019-11-26 02:43:20,117 INFO L249 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2019-11-26 02:43:20,134 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:43:20,134 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-26 02:43:20,135 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:43:20,135 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:43:20,135 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:43:20,135 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:43:20,135 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:43:20,135 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:43:20,149 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-26 02:43:20,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-26 02:43:20,156 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:43:20,156 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-26 02:43:20,156 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-11-26 02:43:20,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:43:20,160 INFO L82 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2019-11-26 02:43:20,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:43:20,168 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1415981907] [2019-11-26 02:43:20,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0f995dba-9ba4-46a4-8c29-a1ef08a54fc6/bin/utaipan/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:43:20,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:43:20,252 INFO L255 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-26 02:43:20,255 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:43:20,294 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-26 02:43:20,294 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:43:20,302 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:43:20,302 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:43:20,303 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-26 02:43:20,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:43:20,316 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:43:20,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:43:20,321 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1415981907] [2019-11-26 02:43:20,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:43:20,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-26 02:43:20,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258632167] [2019-11-26 02:43:20,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-26 02:43:20,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:43:20,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-26 02:43:20,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:43:20,338 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-11-26 02:43:20,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:43:20,398 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2019-11-26 02:43:20,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 02:43:20,400 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-11-26 02:43:20,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:43:20,408 INFO L225 Difference]: With dead ends: 19 [2019-11-26 02:43:20,408 INFO L226 Difference]: Without dead ends: 17 [2019-11-26 02:43:20,410 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:43:20,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-26 02:43:20,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-26 02:43:20,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-26 02:43:20,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-26 02:43:20,437 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 4 [2019-11-26 02:43:20,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:43:20,437 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-26 02:43:20,437 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-26 02:43:20,437 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-26 02:43:20,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-26 02:43:20,438 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:43:20,438 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-26 02:43:20,638 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:43:20,639 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-11-26 02:43:20,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:43:20,639 INFO L82 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2019-11-26 02:43:20,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:43:20,640 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [171924830] [2019-11-26 02:43:20,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0f995dba-9ba4-46a4-8c29-a1ef08a54fc6/bin/utaipan/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:43:20,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:43:20,717 INFO L255 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:43:20,718 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:43:20,732 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-26 02:43:20,732 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:43:20,740 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:43:20,740 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:43:20,741 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-26 02:43:20,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:43:20,762 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:43:20,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:43:20,838 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [171924830] [2019-11-26 02:43:20,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:43:20,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-26 02:43:20,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99343511] [2019-11-26 02:43:20,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 02:43:20,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:43:20,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 02:43:20,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:43:20,843 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2019-11-26 02:43:21,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:43:21,045 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2019-11-26 02:43:21,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-26 02:43:21,047 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-11-26 02:43:21,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:43:21,048 INFO L225 Difference]: With dead ends: 33 [2019-11-26 02:43:21,048 INFO L226 Difference]: Without dead ends: 33 [2019-11-26 02:43:21,049 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:43:21,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-26 02:43:21,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2019-11-26 02:43:21,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-26 02:43:21,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-11-26 02:43:21,053 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 4 [2019-11-26 02:43:21,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:43:21,054 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-11-26 02:43:21,054 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 02:43:21,054 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-11-26 02:43:21,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-26 02:43:21,054 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:43:21,054 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:43:21,256 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:43:21,257 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-11-26 02:43:21,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:43:21,257 INFO L82 PathProgramCache]: Analyzing trace with hash 741359650, now seen corresponding path program 1 times [2019-11-26 02:43:21,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:43:21,258 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1136339448] [2019-11-26 02:43:21,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0f995dba-9ba4-46a4-8c29-a1ef08a54fc6/bin/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:43:21,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:43:21,334 INFO L255 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-26 02:43:21,335 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:43:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:43:21,360 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:43:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:43:21,388 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1136339448] [2019-11-26 02:43:21,388 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4540417] [2019-11-26 02:43:21,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0f995dba-9ba4-46a4-8c29-a1ef08a54fc6/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:43:21,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:43:21,438 INFO L255 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-26 02:43:21,439 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:43:21,450 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-26 02:43:21,450 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:43:21,455 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:43:21,456 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:43:21,456 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-26 02:43:21,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:43:21,533 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:43:21,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:43:21,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:43:21,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4, 4] total 12 [2019-11-26 02:43:21,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882156838] [2019-11-26 02:43:21,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-26 02:43:21,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:43:21,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-26 02:43:21,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-11-26 02:43:21,841 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 8 states. [2019-11-26 02:43:22,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:43:22,310 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2019-11-26 02:43:22,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:43:22,311 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2019-11-26 02:43:22,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:43:22,312 INFO L225 Difference]: With dead ends: 33 [2019-11-26 02:43:22,312 INFO L226 Difference]: Without dead ends: 33 [2019-11-26 02:43:22,313 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2019-11-26 02:43:22,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-26 02:43:22,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2019-11-26 02:43:22,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-26 02:43:22,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-11-26 02:43:22,317 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 10 [2019-11-26 02:43:22,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:43:22,318 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-11-26 02:43:22,318 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-26 02:43:22,318 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-11-26 02:43:22,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-26 02:43:22,319 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:43:22,319 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:43:22,722 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:43:22,723 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-11-26 02:43:22,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:43:22,723 INFO L82 PathProgramCache]: Analyzing trace with hash 741359649, now seen corresponding path program 1 times [2019-11-26 02:43:22,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:43:22,723 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1526124877] [2019-11-26 02:43:22,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0f995dba-9ba4-46a4-8c29-a1ef08a54fc6/bin/utaipan/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:43:22,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:43:22,791 INFO L255 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-26 02:43:22,791 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:43:22,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:43:22,810 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:43:22,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:43:22,831 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1526124877] [2019-11-26 02:43:22,831 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260780967] [2019-11-26 02:43:22,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0f995dba-9ba4-46a4-8c29-a1ef08a54fc6/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:43:22,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:43:22,873 INFO L255 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-26 02:43:22,874 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:43:22,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:43:22,876 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:43:22,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:43:22,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:43:22,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4] total 6 [2019-11-26 02:43:22,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602607489] [2019-11-26 02:43:22,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-26 02:43:22,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:43:22,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-26 02:43:22,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:43:22,880 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 6 states. [2019-11-26 02:43:22,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:43:22,968 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-11-26 02:43:22,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:43:22,969 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-11-26 02:43:22,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:43:22,970 INFO L225 Difference]: With dead ends: 34 [2019-11-26 02:43:22,970 INFO L226 Difference]: Without dead ends: 34 [2019-11-26 02:43:22,971 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-26 02:43:22,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-26 02:43:22,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-11-26 02:43:22,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-26 02:43:22,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2019-11-26 02:43:22,974 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 10 [2019-11-26 02:43:22,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:43:22,975 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2019-11-26 02:43:22,975 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-26 02:43:22,975 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2019-11-26 02:43:22,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-26 02:43:22,976 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:43:22,976 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1] [2019-11-26 02:43:23,378 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:43:23,379 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-11-26 02:43:23,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:43:23,379 INFO L82 PathProgramCache]: Analyzing trace with hash 742961990, now seen corresponding path program 1 times [2019-11-26 02:43:23,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:43:23,380 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1104145518] [2019-11-26 02:43:23,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0f995dba-9ba4-46a4-8c29-a1ef08a54fc6/bin/utaipan/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:43:23,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:43:23,472 INFO L255 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-26 02:43:23,473 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:43:23,489 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-26 02:43:23,490 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:43:23,503 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:43:23,503 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:43:23,504 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-26 02:43:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:43:23,574 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:43:23,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:43:23,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1104145518] [2019-11-26 02:43:23,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568161500] [2019-11-26 02:43:23,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0f995dba-9ba4-46a4-8c29-a1ef08a54fc6/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 02:43:24,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:43:24,042 INFO L255 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-26 02:43:24,043 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:43:24,049 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-26 02:43:24,049 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:43:24,061 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:43:24,061 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:43:24,061 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-26 02:43:24,081 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:43:24,081 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:43:24,491 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:43:24,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:43:24,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4, 5] total 10 [2019-11-26 02:43:24,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111190190] [2019-11-26 02:43:24,493 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-26 02:43:24,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:43:24,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-26 02:43:24,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-11-26 02:43:24,494 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 11 states. [2019-11-26 02:43:24,850 WARN L192 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2019-11-26 02:43:25,090 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2019-11-26 02:43:25,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:43:25,420 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2019-11-26 02:43:25,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-26 02:43:25,422 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2019-11-26 02:43:25,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:43:25,423 INFO L225 Difference]: With dead ends: 74 [2019-11-26 02:43:25,423 INFO L226 Difference]: Without dead ends: 74 [2019-11-26 02:43:25,424 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-11-26 02:43:25,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-26 02:43:25,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 40. [2019-11-26 02:43:25,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-26 02:43:25,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2019-11-26 02:43:25,429 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 10 [2019-11-26 02:43:25,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:43:25,430 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2019-11-26 02:43:25,430 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-26 02:43:25,430 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2019-11-26 02:43:25,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-26 02:43:25,430 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:43:25,431 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:43:25,831 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 02:43:25,832 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-11-26 02:43:25,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:43:25,832 INFO L82 PathProgramCache]: Analyzing trace with hash -2129139287, now seen corresponding path program 2 times [2019-11-26 02:43:25,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:43:25,832 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [718816354] [2019-11-26 02:43:25,832 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0f995dba-9ba4-46a4-8c29-a1ef08a54fc6/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 02:43:25,921 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-26 02:43:25,921 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:43:25,922 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:43:25,923 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:43:25,962 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:43:25,962 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:43:26,058 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:43:26,059 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [718816354] [2019-11-26 02:43:26,059 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361844267] [2019-11-26 02:43:26,059 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0f995dba-9ba4-46a4-8c29-a1ef08a54fc6/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:43:26,104 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-26 02:43:26,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:43:26,107 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-26 02:43:26,108 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:43:26,174 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:43:26,174 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:43:26,488 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:43:26,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:43:26,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 9] total 21 [2019-11-26 02:43:26,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307249906] [2019-11-26 02:43:26,489 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-26 02:43:26,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:43:26,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-26 02:43:26,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2019-11-26 02:43:26,491 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 21 states. [2019-11-26 02:43:27,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:43:27,248 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2019-11-26 02:43:27,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-26 02:43:27,254 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 19 [2019-11-26 02:43:27,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:43:27,255 INFO L225 Difference]: With dead ends: 54 [2019-11-26 02:43:27,255 INFO L226 Difference]: Without dead ends: 54 [2019-11-26 02:43:27,255 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2019-11-26 02:43:27,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-26 02:43:27,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2019-11-26 02:43:27,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-26 02:43:27,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2019-11-26 02:43:27,262 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 19 [2019-11-26 02:43:27,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:43:27,262 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2019-11-26 02:43:27,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-26 02:43:27,262 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2019-11-26 02:43:27,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-26 02:43:27,263 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:43:27,263 INFO L410 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1] [2019-11-26 02:43:27,665 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:43:27,665 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-11-26 02:43:27,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:43:27,666 INFO L82 PathProgramCache]: Analyzing trace with hash -620816058, now seen corresponding path program 2 times [2019-11-26 02:43:27,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:43:27,666 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [486525000] [2019-11-26 02:43:27,667 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0f995dba-9ba4-46a4-8c29-a1ef08a54fc6/bin/utaipan/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:43:27,774 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-26 02:43:27,774 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:43:27,776 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-26 02:43:27,777 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:43:27,784 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-26 02:43:27,784 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:43:27,790 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:43:27,790 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:43:27,790 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-26 02:43:27,892 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:43:27,893 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:43:29,126 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:43:29,126 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [486525000] [2019-11-26 02:43:29,126 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143014404] [2019-11-26 02:43:29,127 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0f995dba-9ba4-46a4-8c29-a1ef08a54fc6/bin/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:43:29,201 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-26 02:43:29,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:43:29,204 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-26 02:43:29,206 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:43:29,211 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-26 02:43:29,211 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:43:29,217 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:43:29,218 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:43:29,218 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-26 02:43:29,291 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:43:29,291 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:43:31,842 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:43:31,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:43:31,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 10] total 22 [2019-11-26 02:43:31,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820893206] [2019-11-26 02:43:31,843 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-26 02:43:31,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:43:31,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-26 02:43:31,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2019-11-26 02:43:31,844 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 23 states. [2019-11-26 02:43:33,768 WARN L192 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2019-11-26 02:43:34,730 WARN L192 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2019-11-26 02:43:35,952 WARN L192 SmtUtils]: Spent 844.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2019-11-26 02:43:36,973 WARN L192 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2019-11-26 02:43:37,744 WARN L192 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 18 [2019-11-26 02:43:39,191 WARN L192 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2019-11-26 02:43:39,847 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2019-11-26 02:43:40,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:43:40,275 INFO L93 Difference]: Finished difference Result 133 states and 153 transitions. [2019-11-26 02:43:40,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-26 02:43:40,277 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 22 [2019-11-26 02:43:40,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:43:40,279 INFO L225 Difference]: With dead ends: 133 [2019-11-26 02:43:40,279 INFO L226 Difference]: Without dead ends: 133 [2019-11-26 02:43:40,279 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=260, Invalid=610, Unknown=0, NotChecked=0, Total=870 [2019-11-26 02:43:40,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-11-26 02:43:40,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 64. [2019-11-26 02:43:40,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-26 02:43:40,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2019-11-26 02:43:40,286 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 22 [2019-11-26 02:43:40,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:43:40,286 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2019-11-26 02:43:40,287 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-26 02:43:40,287 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2019-11-26 02:43:40,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-26 02:43:40,288 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:43:40,288 INFO L410 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1] [2019-11-26 02:43:40,688 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:43:40,689 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-11-26 02:43:40,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:43:40,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1565294406, now seen corresponding path program 3 times [2019-11-26 02:43:40,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:43:40,689 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1028741378] [2019-11-26 02:43:40,689 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0f995dba-9ba4-46a4-8c29-a1ef08a54fc6/bin/utaipan/cvc4 Starting monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:43:41,001 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-11-26 02:43:41,001 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:43:41,018 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-26 02:43:41,020 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:43:41,034 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-26 02:43:41,034 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:43:41,041 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:43:41,042 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:43:41,042 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-26 02:43:41,359 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:43:41,359 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:43:41,957 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2019-11-26 02:43:43,025 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2019-11-26 02:43:43,382 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2019-11-26 02:43:43,797 WARN L192 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2019-11-26 02:43:44,734 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2019-11-26 02:43:46,247 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:43:46,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1028741378] [2019-11-26 02:43:46,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243009206] [2019-11-26 02:43:46,248 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0f995dba-9ba4-46a4-8c29-a1ef08a54fc6/bin/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:43:47,933 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-11-26 02:43:47,933 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:43:47,939 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-26 02:43:47,941 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:43:47,952 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-26 02:43:47,953 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:43:47,960 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:43:47,960 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:43:47,960 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-26 02:43:48,241 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:43:48,241 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:43:49,064 WARN L192 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2019-11-26 02:43:50,560 WARN L192 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2019-11-26 02:43:51,084 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2019-11-26 02:43:52,320 WARN L192 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2019-11-26 02:43:53,066 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:43:53,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:43:53,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 13, 19] total 35 [2019-11-26 02:43:53,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500937686] [2019-11-26 02:43:53,068 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-26 02:43:53,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:43:53,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-26 02:43:53,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=869, Unknown=0, NotChecked=0, Total=1190 [2019-11-26 02:43:53,069 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 35 states. [2019-11-26 02:43:53,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:43:53,718 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2019-11-26 02:43:53,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-26 02:43:53,719 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 34 [2019-11-26 02:43:53,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:43:53,720 INFO L225 Difference]: With dead ends: 50 [2019-11-26 02:43:53,720 INFO L226 Difference]: Without dead ends: 50 [2019-11-26 02:43:53,721 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 81 SyntacticMatches, 18 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=321, Invalid=869, Unknown=0, NotChecked=0, Total=1190 [2019-11-26 02:43:53,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-26 02:43:53,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-26 02:43:53,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-26 02:43:53,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2019-11-26 02:43:53,725 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 34 [2019-11-26 02:43:53,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:43:53,726 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2019-11-26 02:43:53,726 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-26 02:43:53,726 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2019-11-26 02:43:53,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-26 02:43:53,727 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:43:53,727 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:43:54,128 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt --rewrite-divk,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:43:54,128 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-11-26 02:43:54,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:43:54,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1224069289, now seen corresponding path program 3 times [2019-11-26 02:43:54,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:43:54,129 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1694875754] [2019-11-26 02:43:54,129 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0f995dba-9ba4-46a4-8c29-a1ef08a54fc6/bin/utaipan/cvc4 Starting monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:43:54,445 ERROR L271 FreeRefinementEngine]: Caught known exception: Array theory solver does not yet support write-chains connecting two different constant arrays [2019-11-26 02:43:54,447 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [232265406] [2019-11-26 02:43:54,448 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0f995dba-9ba4-46a4-8c29-a1ef08a54fc6/bin/utaipan/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:43:55,490 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-11-26 02:43:55,490 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2019-11-26 02:43:57,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:43:58,000 INFO L174 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2019-11-26 02:43:58,000 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-26 02:43:58,201 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:43:58,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:43:58 BoogieIcfgContainer [2019-11-26 02:43:58,253 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:43:58,253 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:43:58,254 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:43:58,254 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:43:58,254 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:43:20" (3/4) ... [2019-11-26 02:43:58,256 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-26 02:43:58,334 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_0f995dba-9ba4-46a4-8c29-a1ef08a54fc6/bin/utaipan/witness.graphml [2019-11-26 02:43:58,334 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:43:58,335 INFO L168 Benchmark]: Toolchain (without parser) took 39096.05 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 302.5 MB). Free memory was 951.4 MB in the beginning and 965.3 MB in the end (delta: -13.9 MB). Peak memory consumption was 288.6 MB. Max. memory is 11.5 GB. [2019-11-26 02:43:58,336 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:43:58,339 INFO L168 Benchmark]: CACSL2BoogieTranslator took 355.46 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.9 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -189.0 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. [2019-11-26 02:43:58,339 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.79 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:43:58,340 INFO L168 Benchmark]: Boogie Preprocessor took 46.14 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:43:58,340 INFO L168 Benchmark]: RCFGBuilder took 400.33 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:43:58,340 INFO L168 Benchmark]: TraceAbstraction took 38166.41 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 153.6 MB). Free memory was 1.1 GB in the beginning and 977.2 MB in the end (delta: 133.6 MB). Peak memory consumption was 287.2 MB. Max. memory is 11.5 GB. [2019-11-26 02:43:58,341 INFO L168 Benchmark]: Witness Printer took 80.82 ms. Allocated memory is still 1.3 GB. Free memory was 977.2 MB in the beginning and 965.3 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. [2019-11-26 02:43:58,343 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 355.46 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.9 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -189.0 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 42.79 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 46.14 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 400.33 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 38166.41 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 153.6 MB). Free memory was 1.1 GB in the beginning and 977.2 MB in the end (delta: 133.6 MB). Peak memory consumption was 287.2 MB. Max. memory is 11.5 GB. * Witness Printer took 80.82 ms. Allocated memory is still 1.3 GB. Free memory was 977.2 MB in the beginning and 965.3 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 22]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L8] int *array = alloca(10 * sizeof(int)); [L10] int i = 0; [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND TRUE i < 10 [L11] array[i] = i [L10] ++i [L10] COND FALSE !(i < 10) [L14] return array; [L19] int *numbers = getNumbers(); [L21] int i = 0; [L21] COND TRUE i < 10 [L22] numbers + i - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 5 error locations. Result: UNSAFE, OverallTime: 38.1s, OverallIterations: 9, TraceHistogramMax: 11, AutomataDifference: 11.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 102 SDtfs, 678 SDslu, 427 SDs, 0 SdLazy, 1022 SolverSat, 142 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 426 GetRequests, 280 SyntacticMatches, 29 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 23.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 123 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 3.3s SatisfiabilityAnalysisTime, 16.5s InterpolantComputationTime, 255 NumberOfCodeBlocks, 255 NumberOfCodeBlocksAsserted, 49 NumberOfCheckSat, 408 ConstructedInterpolants, 0 QuantifiedInterpolants, 237468 SizeOfPredicates, 37 NumberOfNonLiveVariables, 756 ConjunctsInSsa, 137 ConjunctsInUnsatCore, 28 InterpolantComputations, 6 PerfectInterpolantSequences, 22/972 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...