./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 cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/getNumbers1-1.c -s /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/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 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/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/getNumbers1-1.c -s /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/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 --- This is Ultimate 0.1.24-cad4683 [2019-10-22 11:21:12,024 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:21:12,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:21:12,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:21:12,039 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:21:12,040 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:21:12,042 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:21:12,044 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:21:12,046 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:21:12,049 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:21:12,051 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:21:12,052 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:21:12,058 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:21:12,059 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:21:12,060 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:21:12,060 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:21:12,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:21:12,062 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:21:12,063 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:21:12,064 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:21:12,068 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:21:12,071 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:21:12,073 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:21:12,075 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:21:12,076 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:21:12,077 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:21:12,077 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:21:12,077 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:21:12,078 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:21:12,078 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:21:12,079 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:21:12,079 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:21:12,080 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:21:12,080 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:21:12,081 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:21:12,082 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:21:12,082 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:21:12,082 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:21:12,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:21:12,083 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:21:12,084 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:21:12,085 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2019-10-22 11:21:12,096 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:21:12,096 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:21:12,097 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:21:12,097 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:21:12,097 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:21:12,097 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:21:12,097 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-10-22 11:21:12,098 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:21:12,098 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:21:12,098 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-10-22 11:21:12,098 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-10-22 11:21:12,098 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:21:12,099 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 11:21:12,099 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 11:21:12,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:21:12,100 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:21:12,100 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-10-22 11:21:12,100 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 11:21:12,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:21:12,100 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:21:12,100 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-10-22 11:21:12,101 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-10-22 11:21:12,101 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-10-22 11:21:12,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:21:12,101 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:21:12,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:21:12,102 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:21:12,102 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:21:12,102 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:21:12,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:21:12,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:21:12,103 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:21:12,103 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-22 11:21:12,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 11:21:12,104 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:21:12,104 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/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 [2019-10-22 11:21:12,128 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:21:12,139 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:21:12,141 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:21:12,143 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:21:12,143 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:21:12,144 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/bin/utaipan/../../sv-benchmarks/c/memsafety-ext3/getNumbers1-1.c [2019-10-22 11:21:12,197 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/bin/utaipan/data/f6930e353/debd9336af2e4d08850e462322389b1b/FLAG081c87e79 [2019-10-22 11:21:12,598 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:21:12,599 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/sv-benchmarks/c/memsafety-ext3/getNumbers1-1.c [2019-10-22 11:21:12,606 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/bin/utaipan/data/f6930e353/debd9336af2e4d08850e462322389b1b/FLAG081c87e79 [2019-10-22 11:21:12,964 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/bin/utaipan/data/f6930e353/debd9336af2e4d08850e462322389b1b [2019-10-22 11:21:12,967 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:21:12,969 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:21:12,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:21:12,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:21:12,977 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:21:12,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:21:12" (1/1) ... [2019-10-22 11:21:12,981 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c99f82e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:12, skipping insertion in model container [2019-10-22 11:21:12,981 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:21:12" (1/1) ... [2019-10-22 11:21:12,989 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:21:13,004 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:21:13,196 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:21:13,213 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:21:13,302 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:21:13,321 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:21:13,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:13 WrapperNode [2019-10-22 11:21:13,322 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:21:13,323 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:21:13,323 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:21:13,323 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:21:13,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:13" (1/1) ... [2019-10-22 11:21:13,342 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:13" (1/1) ... [2019-10-22 11:21:13,365 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:21:13,365 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:21:13,365 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:21:13,365 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:21:13,375 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:13" (1/1) ... [2019-10-22 11:21:13,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:13" (1/1) ... [2019-10-22 11:21:13,378 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:13" (1/1) ... [2019-10-22 11:21:13,378 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:13" (1/1) ... [2019-10-22 11:21:13,384 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:13" (1/1) ... [2019-10-22 11:21:13,388 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:13" (1/1) ... [2019-10-22 11:21:13,390 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:13" (1/1) ... [2019-10-22 11:21:13,392 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:21:13,392 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:21:13,392 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:21:13,393 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:21:13,394 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:13" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/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 [2019-10-22 11:21:13,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-22 11:21:13,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:21:13,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:21:13,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-22 11:21:13,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-22 11:21:13,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-22 11:21:13,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 11:21:13,663 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:21:13,663 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-10-22 11:21:13,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:13 BoogieIcfgContainer [2019-10-22 11:21:13,665 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:21:13,666 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:21:13,666 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:21:13,669 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:21:13,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:21:12" (1/3) ... [2019-10-22 11:21:13,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@751876ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:21:13, skipping insertion in model container [2019-10-22 11:21:13,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:13" (2/3) ... [2019-10-22 11:21:13,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@751876ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:21:13, skipping insertion in model container [2019-10-22 11:21:13,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:13" (3/3) ... [2019-10-22 11:21:13,673 INFO L109 eAbstractionObserver]: Analyzing ICFG getNumbers1-1.c [2019-10-22 11:21:13,684 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:21:13,691 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2019-10-22 11:21:13,703 INFO L249 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2019-10-22 11:21:13,723 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:21:13,723 INFO L374 AbstractCegarLoop]: Hoare is false [2019-10-22 11:21:13,723 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:21:13,723 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:21:13,724 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:21:13,724 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:21:13,724 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:21:13,724 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:21:13,739 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-10-22 11:21:13,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-10-22 11:21:13,747 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:13,748 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-10-22 11:21:13,750 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION]=== [2019-10-22 11:21:13,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:13,756 INFO L82 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2019-10-22 11:21:13,765 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:21:13,766 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227468065] [2019-10-22 11:21:13,766 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:13,766 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:13,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:21:13,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:13,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:13,979 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227468065] [2019-10-22 11:21:13,980 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:21:13,980 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 11:21:13,980 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30462021] [2019-10-22 11:21:13,985 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 11:21:13,986 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:21:13,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 11:21:13,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:21:14,000 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-10-22 11:21:14,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:14,038 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2019-10-22 11:21:14,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 11:21:14,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-10-22 11:21:14,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:14,049 INFO L225 Difference]: With dead ends: 19 [2019-10-22 11:21:14,049 INFO L226 Difference]: Without dead ends: 17 [2019-10-22 11:21:14,051 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:21:14,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-22 11:21:14,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-22 11:21:14,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-22 11:21:14,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-10-22 11:21:14,083 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 4 [2019-10-22 11:21:14,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:14,083 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-10-22 11:21:14,084 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 11:21:14,084 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-10-22 11:21:14,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-10-22 11:21:14,084 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:14,084 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-10-22 11:21:14,085 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION]=== [2019-10-22 11:21:14,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:14,085 INFO L82 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2019-10-22 11:21:14,085 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:21:14,085 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70808591] [2019-10-22 11:21:14,085 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:14,086 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:14,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:21:14,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:14,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:14,145 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70808591] [2019-10-22 11:21:14,146 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:21:14,146 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 11:21:14,146 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691325751] [2019-10-22 11:21:14,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 11:21:14,148 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:21:14,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 11:21:14,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:21:14,149 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 3 states. [2019-10-22 11:21:14,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:14,180 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2019-10-22 11:21:14,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 11:21:14,181 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-10-22 11:21:14,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:14,182 INFO L225 Difference]: With dead ends: 20 [2019-10-22 11:21:14,182 INFO L226 Difference]: Without dead ends: 20 [2019-10-22 11:21:14,183 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:21:14,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-22 11:21:14,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-10-22 11:21:14,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-22 11:21:14,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2019-10-22 11:21:14,186 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 4 [2019-10-22 11:21:14,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:14,187 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2019-10-22 11:21:14,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 11:21:14,187 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2019-10-22 11:21:14,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-10-22 11:21:14,188 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:14,188 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2019-10-22 11:21:14,188 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION]=== [2019-10-22 11:21:14,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:14,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1809646286, now seen corresponding path program 1 times [2019-10-22 11:21:14,189 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:21:14,189 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056052821] [2019-10-22 11:21:14,189 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:14,189 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:14,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:21:14,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:14,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:14,325 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056052821] [2019-10-22 11:21:14,326 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:21:14,326 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 11:21:14,326 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707228259] [2019-10-22 11:21:14,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 11:21:14,327 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:21:14,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 11:21:14,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-22 11:21:14,327 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states. [2019-10-22 11:21:14,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:14,389 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2019-10-22 11:21:14,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 11:21:14,389 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2019-10-22 11:21:14,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:14,390 INFO L225 Difference]: With dead ends: 19 [2019-10-22 11:21:14,390 INFO L226 Difference]: Without dead ends: 19 [2019-10-22 11:21:14,391 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-22 11:21:14,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-22 11:21:14,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2019-10-22 11:21:14,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-22 11:21:14,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-10-22 11:21:14,394 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 7 [2019-10-22 11:21:14,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:14,394 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-10-22 11:21:14,394 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 11:21:14,394 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-10-22 11:21:14,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-22 11:21:14,395 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:14,395 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:21:14,395 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION]=== [2019-10-22 11:21:14,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:14,396 INFO L82 PathProgramCache]: Analyzing trace with hash 741359650, now seen corresponding path program 1 times [2019-10-22 11:21:14,396 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:21:14,396 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179090437] [2019-10-22 11:21:14,396 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:14,396 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:14,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:21:14,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:14,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 11:21:14,505 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179090437] [2019-10-22 11:21:14,505 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:21:14,505 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-22 11:21:14,506 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056186937] [2019-10-22 11:21:14,506 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 11:21:14,506 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:21:14,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 11:21:14,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 11:21:14,507 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2019-10-22 11:21:14,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:14,612 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2019-10-22 11:21:14,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 11:21:14,613 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-10-22 11:21:14,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:14,614 INFO L225 Difference]: With dead ends: 22 [2019-10-22 11:21:14,614 INFO L226 Difference]: Without dead ends: 22 [2019-10-22 11:21:14,614 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 11:21:14,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-22 11:21:14,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2019-10-22 11:21:14,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-22 11:21:14,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-10-22 11:21:14,620 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 10 [2019-10-22 11:21:14,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:14,620 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-10-22 11:21:14,620 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 11:21:14,620 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-10-22 11:21:14,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-22 11:21:14,621 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:14,621 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:21:14,621 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION]=== [2019-10-22 11:21:14,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:14,621 INFO L82 PathProgramCache]: Analyzing trace with hash 741359649, now seen corresponding path program 1 times [2019-10-22 11:21:14,622 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:21:14,622 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591413288] [2019-10-22 11:21:14,622 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:14,622 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:14,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:21:14,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:14,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:14,686 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591413288] [2019-10-22 11:21:14,686 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632720359] [2019-10-22 11:21:14,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:21:14,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:14,735 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 11:21:14,739 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:14,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:14,770 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:14,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:14,788 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [389619028] [2019-10-22 11:21:14,794 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 11 [2019-10-22 11:21:14,842 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-10-22 11:21:14,842 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-22 11:21:15,144 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:21:15,145 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: inappropriate decl info IMPLEMENTATION at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Boogie2SmtSymbolTable.getBoogieVar(Boogie2SmtSymbolTable.java:222) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.getBoogieVar(NonrelationalStatementProcessor.java:348) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.handleHavocStatement(NonrelationalStatementProcessor.java:325) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.processStatement(NonrelationalStatementProcessor.java:159) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.process(NonrelationalStatementProcessor.java:138) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.process(NonrelationalStatementProcessor.java:107) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.handleInternalTransition(NonrelationalPostOperator.java:422) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.handleInternalTransition(NonrelationalPostOperator.java:413) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.apply(NonrelationalPostOperator.java:140) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.apply(NonrelationalPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.applyInternally(CompoundDomainPostOperator.java:306) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.apply(CompoundDomainPostOperator.java:131) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.apply(CompoundDomainPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormanCachedPostOperation.restoreOriginalStateVariables(PoormanCachedPostOperation.java:322) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.applyPost(PoormansAbstractPostOperator.java:217) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.apply(PoormansAbstractPostOperator.java:120) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.apply(PoormansAbstractPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.lambda$17(DisjunctiveAbstractState.java:323) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.mapCollection(DisjunctiveAbstractState.java:519) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.apply(DisjunctiveAbstractState.java:323) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateAbstractPost(FixpointEngine.java:249) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateFixpoint(FixpointEngine.java:134) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.run(FixpointEngine.java:105) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.tool.AbstractInterpreter.runWithoutTimeoutAndResults(AbstractInterpreter.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.generateFixpoints(CegarAbsIntRunner.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.(CegarAbsIntRunner.java:158) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAbstractInterpretation.getOrConstructRunner(IpTcStrategyModuleAbstractInterpretation.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAbstractInterpretation.construct(IpTcStrategyModuleAbstractInterpretation.java:81) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:299) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-10-22 11:21:15,161 INFO L168 Benchmark]: Toolchain (without parser) took 2191.12 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 118.0 MB). Free memory was 949.9 MB in the beginning and 995.9 MB in the end (delta: -46.0 MB). Peak memory consumption was 71.9 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:15,162 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:21:15,163 INFO L168 Benchmark]: CACSL2BoogieTranslator took 352.48 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 118.0 MB). Free memory was 949.9 MB in the beginning and 1.1 GB in the end (delta: -162.3 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:15,163 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.94 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:21:15,163 INFO L168 Benchmark]: Boogie Preprocessor took 26.97 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:15,164 INFO L168 Benchmark]: RCFGBuilder took 272.68 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:15,169 INFO L168 Benchmark]: TraceAbstraction took 1492.63 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 995.9 MB in the end (delta: 89.1 MB). Peak memory consumption was 89.1 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:15,173 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 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 352.48 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 118.0 MB). Free memory was 949.9 MB in the beginning and 1.1 GB in the end (delta: -162.3 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 41.94 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 26.97 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 11.5 GB. * RCFGBuilder took 272.68 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1492.63 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 995.9 MB in the end (delta: 89.1 MB). Peak memory consumption was 89.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: inappropriate decl info IMPLEMENTATION de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: inappropriate decl info IMPLEMENTATION: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Boogie2SmtSymbolTable.getBoogieVar(Boogie2SmtSymbolTable.java:222) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-cad4683 [2019-10-22 11:21:17,460 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:21:17,462 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:21:17,472 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:21:17,472 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:21:17,473 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:21:17,474 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:21:17,476 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:21:17,478 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:21:17,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:21:17,479 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:21:17,480 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:21:17,481 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:21:17,482 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:21:17,483 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:21:17,484 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:21:17,484 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:21:17,485 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:21:17,487 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:21:17,488 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:21:17,490 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:21:17,491 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:21:17,492 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:21:17,493 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:21:17,495 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:21:17,496 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:21:17,496 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:21:17,498 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:21:17,499 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:21:17,500 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:21:17,500 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:21:17,501 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:21:17,501 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:21:17,502 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:21:17,503 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:21:17,503 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:21:17,504 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:21:17,504 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:21:17,504 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:21:17,507 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:21:17,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:21:17,510 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2019-10-22 11:21:17,530 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:21:17,532 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:21:17,533 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:21:17,533 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:21:17,533 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:21:17,533 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:21:17,534 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:21:17,534 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:21:17,534 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:21:17,535 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 11:21:17,536 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 11:21:17,536 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:21:17,536 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:21:17,537 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-10-22 11:21:17,537 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 11:21:17,537 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:21:17,537 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:21:17,538 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-10-22 11:21:17,538 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-10-22 11:21:17,538 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-10-22 11:21:17,538 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:21:17,538 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-10-22 11:21:17,538 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-10-22 11:21:17,538 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:21:17,539 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 11:21:17,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:21:17,539 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:21:17,539 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:21:17,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:21:17,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:21:17,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:21:17,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:21:17,540 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-10-22 11:21:17,540 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-10-22 11:21:17,540 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:21:17,540 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/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/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 [2019-10-22 11:21:17,597 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:21:17,608 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:21:17,612 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:21:17,613 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:21:17,614 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:21:17,614 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/bin/utaipan/../../sv-benchmarks/c/memsafety-ext3/getNumbers1-1.c [2019-10-22 11:21:17,668 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/bin/utaipan/data/53255e882/8b19a041d70a407993967bb325ffa1b2/FLAGda2ce87ce [2019-10-22 11:21:18,054 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:21:18,055 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/sv-benchmarks/c/memsafety-ext3/getNumbers1-1.c [2019-10-22 11:21:18,060 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/bin/utaipan/data/53255e882/8b19a041d70a407993967bb325ffa1b2/FLAGda2ce87ce [2019-10-22 11:21:18,462 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/bin/utaipan/data/53255e882/8b19a041d70a407993967bb325ffa1b2 [2019-10-22 11:21:18,465 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:21:18,466 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:21:18,467 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:21:18,467 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:21:18,473 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:21:18,474 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:21:18" (1/1) ... [2019-10-22 11:21:18,477 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b150bd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:18, skipping insertion in model container [2019-10-22 11:21:18,478 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:21:18" (1/1) ... [2019-10-22 11:21:18,485 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:21:18,503 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:21:18,701 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:21:18,731 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:21:18,751 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:21:18,766 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:21:18,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:18 WrapperNode [2019-10-22 11:21:18,766 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:21:18,767 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:21:18,767 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:21:18,767 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:21:18,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:18" (1/1) ... [2019-10-22 11:21:18,843 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:18" (1/1) ... [2019-10-22 11:21:18,860 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:21:18,861 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:21:18,861 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:21:18,861 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:21:18,868 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:18" (1/1) ... [2019-10-22 11:21:18,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:18" (1/1) ... [2019-10-22 11:21:18,871 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:18" (1/1) ... [2019-10-22 11:21:18,871 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:18" (1/1) ... [2019-10-22 11:21:18,879 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:18" (1/1) ... [2019-10-22 11:21:18,884 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:18" (1/1) ... [2019-10-22 11:21:18,886 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:18" (1/1) ... [2019-10-22 11:21:18,888 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:21:18,889 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:21:18,889 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:21:18,889 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:21:18,890 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:18" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/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 [2019-10-22 11:21:18,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-10-22 11:21:18,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:21:18,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:21:18,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2019-10-22 11:21:18,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-22 11:21:18,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 11:21:18,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-10-22 11:21:19,167 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:21:19,167 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-10-22 11:21:19,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:19 BoogieIcfgContainer [2019-10-22 11:21:19,168 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:21:19,170 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:21:19,170 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:21:19,172 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:21:19,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:21:18" (1/3) ... [2019-10-22 11:21:19,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d9730ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:21:19, skipping insertion in model container [2019-10-22 11:21:19,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:18" (2/3) ... [2019-10-22 11:21:19,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d9730ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:21:19, skipping insertion in model container [2019-10-22 11:21:19,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:19" (3/3) ... [2019-10-22 11:21:19,176 INFO L109 eAbstractionObserver]: Analyzing ICFG getNumbers1-1.c [2019-10-22 11:21:19,186 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:21:19,194 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2019-10-22 11:21:19,206 INFO L249 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2019-10-22 11:21:19,228 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:21:19,228 INFO L374 AbstractCegarLoop]: Hoare is false [2019-10-22 11:21:19,228 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:21:19,228 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:21:19,228 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:21:19,228 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:21:19,228 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:21:19,229 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:21:19,251 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-10-22 11:21:19,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-10-22 11:21:19,267 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:19,268 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-10-22 11:21:19,270 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION]=== [2019-10-22 11:21:19,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:19,276 INFO L82 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2019-10-22 11:21:19,288 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:21:19,288 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [971333020] [2019-10-22 11:21:19,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/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 [2019-10-22 11:21:19,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:19,405 INFO L256 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 11:21:19,410 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:19,472 INFO L375 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 [2019-10-22 11:21:19,473 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 11:21:19,482 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:21:19,482 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-22 11:21:19,483 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-10-22 11:21:19,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:19,492 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:19,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:19,498 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [971333020] [2019-10-22 11:21:19,499 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:21:19,499 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-10-22 11:21:19,499 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32656397] [2019-10-22 11:21:19,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 11:21:19,503 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:21:19,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 11:21:19,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:21:19,516 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-10-22 11:21:19,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:19,570 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2019-10-22 11:21:19,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 11:21:19,572 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-10-22 11:21:19,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:19,581 INFO L225 Difference]: With dead ends: 19 [2019-10-22 11:21:19,581 INFO L226 Difference]: Without dead ends: 17 [2019-10-22 11:21:19,583 INFO L600 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 [2019-10-22 11:21:19,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-22 11:21:19,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-22 11:21:19,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-22 11:21:19,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-10-22 11:21:19,618 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 4 [2019-10-22 11:21:19,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:19,618 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-10-22 11:21:19,618 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 11:21:19,618 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-10-22 11:21:19,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-10-22 11:21:19,619 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:19,619 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-10-22 11:21:19,820 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:21:19,820 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION]=== [2019-10-22 11:21:19,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:19,820 INFO L82 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2019-10-22 11:21:19,821 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:21:19,821 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1261645266] [2019-10-22 11:21:19,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/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 [2019-10-22 11:21:19,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:19,889 INFO L256 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:21:19,890 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:19,903 INFO L375 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 [2019-10-22 11:21:19,903 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 11:21:19,914 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:21:19,914 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-22 11:21:19,915 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-10-22 11:21:19,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:19,938 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:20,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:20,011 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1261645266] [2019-10-22 11:21:20,012 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:21:20,012 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-10-22 11:21:20,012 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259643195] [2019-10-22 11:21:20,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 11:21:20,014 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:21:20,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 11:21:20,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:21:20,015 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2019-10-22 11:21:20,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:20,202 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2019-10-22 11:21:20,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 11:21:20,203 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-10-22 11:21:20,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:20,204 INFO L225 Difference]: With dead ends: 33 [2019-10-22 11:21:20,204 INFO L226 Difference]: Without dead ends: 33 [2019-10-22 11:21:20,205 INFO L600 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 [2019-10-22 11:21:20,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-22 11:21:20,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2019-10-22 11:21:20,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-22 11:21:20,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-10-22 11:21:20,210 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 4 [2019-10-22 11:21:20,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:20,213 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-10-22 11:21:20,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 11:21:20,213 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-10-22 11:21:20,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-22 11:21:20,214 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:20,214 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:21:20,415 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:21:20,415 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION]=== [2019-10-22 11:21:20,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:20,416 INFO L82 PathProgramCache]: Analyzing trace with hash 741359650, now seen corresponding path program 1 times [2019-10-22 11:21:20,416 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:21:20,417 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1208374703] [2019-10-22 11:21:20,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/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 [2019-10-22 11:21:20,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:20,496 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 11:21:20,497 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:20,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:20,525 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:20,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:20,558 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1208374703] [2019-10-22 11:21:20,558 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804319821] [2019-10-22 11:21:20,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/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 [2019-10-22 11:21:20,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:20,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 11:21:20,613 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:20,622 INFO L375 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 [2019-10-22 11:21:20,622 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 11:21:20,630 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:21:20,630 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-22 11:21:20,631 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-10-22 11:21:20,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 11:21:20,697 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:20,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 11:21:20,941 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-10-22 11:21:20,941 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4, 4] total 12 [2019-10-22 11:21:20,941 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20853032] [2019-10-22 11:21:20,942 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-22 11:21:20,942 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:21:20,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 11:21:20,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-10-22 11:21:20,943 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 8 states. [2019-10-22 11:21:21,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:21,365 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2019-10-22 11:21:21,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 11:21:21,366 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2019-10-22 11:21:21,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:21,367 INFO L225 Difference]: With dead ends: 33 [2019-10-22 11:21:21,367 INFO L226 Difference]: Without dead ends: 33 [2019-10-22 11:21:21,368 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2019-10-22 11:21:21,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-22 11:21:21,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2019-10-22 11:21:21,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-22 11:21:21,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-10-22 11:21:21,378 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 10 [2019-10-22 11:21:21,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:21,379 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-10-22 11:21:21,379 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-22 11:21:21,379 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-10-22 11:21:21,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-22 11:21:21,380 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:21,380 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:21:21,782 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 [2019-10-22 11:21:21,783 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION]=== [2019-10-22 11:21:21,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:21,784 INFO L82 PathProgramCache]: Analyzing trace with hash 741359649, now seen corresponding path program 1 times [2019-10-22 11:21:21,784 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:21:21,784 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1222796883] [2019-10-22 11:21:21,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/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 [2019-10-22 11:21:21,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:21,844 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 11:21:21,845 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:21,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:21,856 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:21,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:21,878 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1222796883] [2019-10-22 11:21:21,878 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763187095] [2019-10-22 11:21:21,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/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 [2019-10-22 11:21:21,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:21,923 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 11:21:21,924 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:21,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:21,927 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:21,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:21,930 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:21:21,930 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4] total 6 [2019-10-22 11:21:21,930 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979726623] [2019-10-22 11:21:21,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 11:21:21,931 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:21:21,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 11:21:21,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-22 11:21:21,932 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 6 states. [2019-10-22 11:21:22,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:22,025 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-10-22 11:21:22,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 11:21:22,026 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-10-22 11:21:22,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:22,026 INFO L225 Difference]: With dead ends: 34 [2019-10-22 11:21:22,027 INFO L226 Difference]: Without dead ends: 34 [2019-10-22 11:21:22,029 INFO L600 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 [2019-10-22 11:21:22,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-22 11:21:22,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-10-22 11:21:22,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-22 11:21:22,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2019-10-22 11:21:22,033 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 10 [2019-10-22 11:21:22,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:22,033 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2019-10-22 11:21:22,034 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 11:21:22,034 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2019-10-22 11:21:22,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-22 11:21:22,034 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:22,034 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1] [2019-10-22 11:21:22,435 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 [2019-10-22 11:21:22,436 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION]=== [2019-10-22 11:21:22,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:22,436 INFO L82 PathProgramCache]: Analyzing trace with hash 742961990, now seen corresponding path program 1 times [2019-10-22 11:21:22,437 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:21:22,437 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2057063381] [2019-10-22 11:21:22,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/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 [2019-10-22 11:21:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:22,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 11:21:22,542 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:22,549 INFO L375 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 [2019-10-22 11:21:22,549 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 11:21:22,556 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:21:22,557 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-22 11:21:22,557 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-10-22 11:21:22,606 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:22,606 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:22,961 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2057063381] [2019-10-22 11:21:22,961 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792785782] [2019-10-22 11:21:22,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/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 [2019-10-22 11:21:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:23,010 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 11:21:23,011 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:23,017 INFO L375 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 [2019-10-22 11:21:23,018 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 11:21:23,033 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:21:23,034 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-22 11:21:23,034 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-10-22 11:21:23,053 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:23,053 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:23,347 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:23,348 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:21:23,348 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4, 5] total 10 [2019-10-22 11:21:23,348 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389505579] [2019-10-22 11:21:23,348 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-22 11:21:23,349 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:21:23,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-22 11:21:23,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-10-22 11:21:23,349 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 11 states. [2019-10-22 11:21:23,673 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2019-10-22 11:21:23,914 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2019-10-22 11:21:24,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:24,182 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2019-10-22 11:21:24,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 11:21:24,184 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2019-10-22 11:21:24,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:24,185 INFO L225 Difference]: With dead ends: 74 [2019-10-22 11:21:24,185 INFO L226 Difference]: Without dead ends: 74 [2019-10-22 11:21:24,186 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-10-22 11:21:24,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-22 11:21:24,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 40. [2019-10-22 11:21:24,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-22 11:21:24,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2019-10-22 11:21:24,191 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 10 [2019-10-22 11:21:24,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:24,191 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2019-10-22 11:21:24,191 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-22 11:21:24,192 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2019-10-22 11:21:24,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-22 11:21:24,192 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:24,192 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:21:24,593 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 [2019-10-22 11:21:24,593 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION]=== [2019-10-22 11:21:24,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:24,594 INFO L82 PathProgramCache]: Analyzing trace with hash -2129139287, now seen corresponding path program 2 times [2019-10-22 11:21:24,594 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:21:24,594 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [754484128] [2019-10-22 11:21:24,594 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/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 [2019-10-22 11:21:24,705 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:21:24,705 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:21:24,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:21:24,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:24,741 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:24,741 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:24,846 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:24,846 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [754484128] [2019-10-22 11:21:24,847 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833278322] [2019-10-22 11:21:24,847 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/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 [2019-10-22 11:21:24,894 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:21:24,894 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:21:24,896 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 11:21:24,897 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:24,977 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:25,298 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:25,298 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:21:25,298 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 9] total 21 [2019-10-22 11:21:25,298 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348744776] [2019-10-22 11:21:25,299 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-22 11:21:25,299 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:21:25,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-22 11:21:25,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2019-10-22 11:21:25,300 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 21 states. [2019-10-22 11:21:26,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:26,019 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2019-10-22 11:21:26,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-22 11:21:26,021 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 19 [2019-10-22 11:21:26,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:26,022 INFO L225 Difference]: With dead ends: 54 [2019-10-22 11:21:26,022 INFO L226 Difference]: Without dead ends: 54 [2019-10-22 11:21:26,022 INFO L600 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 [2019-10-22 11:21:26,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-22 11:21:26,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2019-10-22 11:21:26,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-22 11:21:26,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2019-10-22 11:21:26,027 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 19 [2019-10-22 11:21:26,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:26,027 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2019-10-22 11:21:26,027 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-22 11:21:26,027 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2019-10-22 11:21:26,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-22 11:21:26,028 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:26,028 INFO L380 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1] [2019-10-22 11:21:26,429 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 [2019-10-22 11:21:26,429 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION]=== [2019-10-22 11:21:26,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:26,430 INFO L82 PathProgramCache]: Analyzing trace with hash -620816058, now seen corresponding path program 2 times [2019-10-22 11:21:26,430 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:21:26,430 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [368300577] [2019-10-22 11:21:26,430 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/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 [2019-10-22 11:21:26,566 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:21:26,566 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:21:26,567 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-22 11:21:26,568 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:26,573 INFO L375 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 [2019-10-22 11:21:26,574 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 11:21:26,580 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:21:26,580 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-22 11:21:26,580 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-10-22 11:21:26,664 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:26,664 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:27,975 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:27,975 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [368300577] [2019-10-22 11:21:27,975 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494632705] [2019-10-22 11:21:27,976 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/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 [2019-10-22 11:21:28,024 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:21:28,024 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:21:28,028 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-22 11:21:28,029 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:28,036 INFO L375 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 [2019-10-22 11:21:28,036 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 11:21:28,042 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:21:28,042 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-22 11:21:28,042 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-10-22 11:21:28,087 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:28,087 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:30,015 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:30,015 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:21:30,016 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 10] total 22 [2019-10-22 11:21:30,016 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823959338] [2019-10-22 11:21:30,016 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-22 11:21:30,016 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:21:30,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-22 11:21:30,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2019-10-22 11:21:30,017 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 23 states. [2019-10-22 11:21:31,505 WARN L191 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2019-10-22 11:21:32,634 WARN L191 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2019-10-22 11:21:33,680 WARN L191 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2019-10-22 11:21:34,557 WARN L191 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2019-10-22 11:21:35,118 WARN L191 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 18 [2019-10-22 11:21:36,223 WARN L191 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2019-10-22 11:21:37,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:37,118 INFO L93 Difference]: Finished difference Result 133 states and 153 transitions. [2019-10-22 11:21:37,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-22 11:21:37,119 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 22 [2019-10-22 11:21:37,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:37,120 INFO L225 Difference]: With dead ends: 133 [2019-10-22 11:21:37,120 INFO L226 Difference]: Without dead ends: 133 [2019-10-22 11:21:37,120 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=260, Invalid=610, Unknown=0, NotChecked=0, Total=870 [2019-10-22 11:21:37,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-10-22 11:21:37,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 64. [2019-10-22 11:21:37,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-22 11:21:37,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2019-10-22 11:21:37,128 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 22 [2019-10-22 11:21:37,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:37,128 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2019-10-22 11:21:37,128 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-22 11:21:37,128 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2019-10-22 11:21:37,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-22 11:21:37,129 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:37,129 INFO L380 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1] [2019-10-22 11:21:37,530 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 [2019-10-22 11:21:37,530 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION]=== [2019-10-22 11:21:37,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:37,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1565294406, now seen corresponding path program 3 times [2019-10-22 11:21:37,531 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:21:37,531 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [67389001] [2019-10-22 11:21:37,531 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/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 [2019-10-22 11:21:37,788 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-10-22 11:21:37,789 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:21:37,804 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-22 11:21:37,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:37,813 INFO L375 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 [2019-10-22 11:21:37,813 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 11:21:37,820 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:21:37,820 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-22 11:21:37,820 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-10-22 11:21:38,039 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:38,039 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:38,562 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2019-10-22 11:21:40,322 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2019-10-22 11:21:42,270 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:42,270 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [67389001] [2019-10-22 11:21:42,271 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114186899] [2019-10-22 11:21:42,271 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/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 [2019-10-22 11:21:42,542 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-10-22 11:21:42,542 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:21:42,547 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-22 11:21:42,548 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:42,556 INFO L375 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 [2019-10-22 11:21:42,556 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 11:21:42,561 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 11:21:42,561 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-22 11:21:42,561 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-10-22 11:21:42,659 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:42,659 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:48,670 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:48,671 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:21:48,671 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 13, 18] total 42 [2019-10-22 11:21:48,671 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75126550] [2019-10-22 11:21:48,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-10-22 11:21:48,672 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:21:48,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-10-22 11:21:48,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1303, Unknown=0, NotChecked=0, Total=1722 [2019-10-22 11:21:48,673 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 42 states. [2019-10-22 11:21:49,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:49,345 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2019-10-22 11:21:49,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-22 11:21:49,345 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 34 [2019-10-22 11:21:49,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:49,346 INFO L225 Difference]: With dead ends: 50 [2019-10-22 11:21:49,346 INFO L226 Difference]: Without dead ends: 50 [2019-10-22 11:21:49,346 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 76 SyntacticMatches, 16 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=419, Invalid=1303, Unknown=0, NotChecked=0, Total=1722 [2019-10-22 11:21:49,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-22 11:21:49,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-10-22 11:21:49,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-22 11:21:49,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2019-10-22 11:21:49,348 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 34 [2019-10-22 11:21:49,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:49,348 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2019-10-22 11:21:49,348 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-10-22 11:21:49,349 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2019-10-22 11:21:49,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-22 11:21:49,349 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:49,350 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:21:49,750 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 [2019-10-22 11:21:49,750 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION]=== [2019-10-22 11:21:49,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:49,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1224069289, now seen corresponding path program 3 times [2019-10-22 11:21:49,751 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:21:49,751 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [670772374] [2019-10-22 11:21:49,751 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/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 [2019-10-22 11:21:50,048 ERROR L273 tionRefinementEngine]: Caught known exception: Array theory solver does not yet support write-chains connecting two different constant arrays [2019-10-22 11:21:50,048 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1320725265] [2019-10-22 11:21:50,048 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/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 [2019-10-22 11:21:50,671 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-10-22 11:21:50,671 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2019-10-22 11:21:51,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:21:51,984 INFO L168 tionRefinementEngine]: Strategy WALRUS found a feasible trace [2019-10-22 11:21:51,984 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 11:21:52,184 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:21:52,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 11:21:52 BoogieIcfgContainer [2019-10-22 11:21:52,230 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 11:21:52,231 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 11:21:52,231 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 11:21:52,231 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 11:21:52,231 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:19" (3/4) ... [2019-10-22 11:21:52,233 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 11:21:52,304 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_a5ab0ab3-1506-42d8-9eb8-861b69decfe4/bin/utaipan/witness.graphml [2019-10-22 11:21:52,307 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 11:21:52,308 INFO L168 Benchmark]: Toolchain (without parser) took 33842.20 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 269.5 MB). Free memory was 950.9 MB in the beginning and 890.7 MB in the end (delta: 60.2 MB). Peak memory consumption was 329.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:52,308 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:21:52,309 INFO L168 Benchmark]: CACSL2BoogieTranslator took 299.49 ms. Allocated memory is still 1.0 GB. Free memory was 950.9 MB in the beginning and 940.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:52,309 INFO L168 Benchmark]: Boogie Procedure Inliner took 93.29 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 103.8 MB). Free memory was 940.2 MB in the beginning and 1.1 GB in the end (delta: -159.1 MB). Peak memory consumption was 12.4 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:52,309 INFO L168 Benchmark]: Boogie Preprocessor took 27.76 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 8.3 MB). Peak memory consumption was 8.3 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:52,310 INFO L168 Benchmark]: RCFGBuilder took 279.77 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:52,311 INFO L168 Benchmark]: TraceAbstraction took 33060.68 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 165.7 MB). Free memory was 1.1 GB in the beginning and 890.7 MB in the end (delta: 181.5 MB). Peak memory consumption was 347.2 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:52,311 INFO L168 Benchmark]: Witness Printer took 76.23 ms. Allocated memory is still 1.3 GB. Free memory is still 890.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:21:52,313 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 299.49 ms. Allocated memory is still 1.0 GB. Free memory was 950.9 MB in the beginning and 940.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 93.29 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 103.8 MB). Free memory was 940.2 MB in the beginning and 1.1 GB in the end (delta: -159.1 MB). Peak memory consumption was 12.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 27.76 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 8.3 MB). Peak memory consumption was 8.3 MB. Max. memory is 11.5 GB. * RCFGBuilder took 279.77 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 33060.68 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 165.7 MB). Free memory was 1.1 GB in the beginning and 890.7 MB in the end (delta: 181.5 MB). Peak memory consumption was 347.2 MB. Max. memory is 11.5 GB. * Witness Printer took 76.23 ms. Allocated memory is still 1.3 GB. Free memory is still 890.7 MB. There was no memory consumed. 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: 33.0s, OverallIterations: 9, TraceHistogramMax: 11, AutomataDifference: 10.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 102 SDtfs, 800 SDslu, 427 SDs, 0 SdLazy, 1024 SolverSat, 188 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 426 GetRequests, 275 SyntacticMatches, 27 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 21.8s 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, 1.4s SatisfiabilityAnalysisTime, 15.9s InterpolantComputationTime, 255 NumberOfCodeBlocks, 255 NumberOfCodeBlocksAsserted, 49 NumberOfCheckSat, 408 ConstructedInterpolants, 0 QuantifiedInterpolants, 220737 SizeOfPredicates, 37 NumberOfNonLiveVariables, 742 ConjunctsInSsa, 133 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...