./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test4_true-valid-memsafety_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test4_true-valid-memsafety_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/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 ed29e343041979fe95e5835578848b9a30317117 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test4_true-valid-memsafety_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/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 ed29e343041979fe95e5835578848b9a30317117 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-03 01:56:18,360 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 01:56:18,361 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 01:56:18,368 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 01:56:18,368 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 01:56:18,368 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 01:56:18,369 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 01:56:18,370 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 01:56:18,370 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 01:56:18,371 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 01:56:18,371 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-03 01:56:18,371 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-03 01:56:18,372 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-03 01:56:18,372 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-03 01:56:18,373 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-03 01:56:18,373 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-03 01:56:18,373 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-03 01:56:18,374 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-03 01:56:18,376 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-03 01:56:18,376 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-03 01:56:18,377 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-03 01:56:18,377 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-03 01:56:18,378 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-03 01:56:18,378 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-03 01:56:18,379 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-03 01:56:18,379 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-03 01:56:18,379 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-03 01:56:18,380 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-03 01:56:18,380 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-03 01:56:18,381 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-03 01:56:18,381 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-03 01:56:18,382 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-03 01:56:18,382 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-03 01:56:18,382 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-03 01:56:18,383 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-03 01:56:18,383 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-03 01:56:18,383 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2018-12-03 01:56:18,393 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 01:56:18,393 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 01:56:18,394 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 01:56:18,394 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 01:56:18,394 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 01:56:18,394 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 01:56:18,395 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-03 01:56:18,395 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 01:56:18,395 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-03 01:56:18,395 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-03 01:56:18,395 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 01:56:18,395 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-03 01:56:18,395 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 01:56:18,396 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-03 01:56:18,396 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-03 01:56:18,396 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 01:56:18,397 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 01:56:18,397 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-03 01:56:18,397 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 01:56:18,397 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 01:56:18,397 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 01:56:18,397 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-03 01:56:18,397 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-03 01:56:18,398 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-03 01:56:18,398 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 01:56:18,398 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 01:56:18,398 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 01:56:18,398 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 01:56:18,398 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-03 01:56:18,398 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 01:56:18,399 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 01:56:18,399 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 01:56:18,399 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 01:56:18,399 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 01:56:18,399 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 01:56:18,399 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 01:56:18,399 INFO L133 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_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/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 -> ed29e343041979fe95e5835578848b9a30317117 [2018-12-03 01:56:18,422 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 01:56:18,430 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 01:56:18,432 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 01:56:18,433 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-03 01:56:18,433 INFO L276 PluginConnector]: CDTParser initialized [2018-12-03 01:56:18,434 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/utaipan/../../sv-benchmarks/c/ldv-memsafety/memleaks_test4_true-valid-memsafety_true-termination.i [2018-12-03 01:56:18,471 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/utaipan/data/9f029aba7/6157fcafbe7b4d31aeb34ef97645da0a/FLAG7662706ce [2018-12-03 01:56:18,821 INFO L307 CDTParser]: Found 1 translation units. [2018-12-03 01:56:18,821 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/sv-benchmarks/c/ldv-memsafety/memleaks_test4_true-valid-memsafety_true-termination.i [2018-12-03 01:56:18,829 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/utaipan/data/9f029aba7/6157fcafbe7b4d31aeb34ef97645da0a/FLAG7662706ce [2018-12-03 01:56:18,838 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/utaipan/data/9f029aba7/6157fcafbe7b4d31aeb34ef97645da0a [2018-12-03 01:56:18,840 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 01:56:18,841 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-03 01:56:18,841 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-03 01:56:18,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-03 01:56:18,844 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-03 01:56:18,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 01:56:18" (1/1) ... [2018-12-03 01:56:18,846 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f5fc0d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:56:18, skipping insertion in model container [2018-12-03 01:56:18,846 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 01:56:18" (1/1) ... [2018-12-03 01:56:18,850 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-03 01:56:18,873 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-03 01:56:19,100 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-03 01:56:19,109 INFO L191 MainTranslator]: Completed pre-run [2018-12-03 01:56:19,145 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-03 01:56:19,175 INFO L195 MainTranslator]: Completed translation [2018-12-03 01:56:19,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:56:19 WrapperNode [2018-12-03 01:56:19,176 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-03 01:56:19,176 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 01:56:19,176 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 01:56:19,176 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 01:56:19,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:56:19" (1/1) ... [2018-12-03 01:56:19,191 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:56:19" (1/1) ... [2018-12-03 01:56:19,196 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 01:56:19,196 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 01:56:19,197 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 01:56:19,197 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 01:56:19,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:56:19" (1/1) ... [2018-12-03 01:56:19,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:56:19" (1/1) ... [2018-12-03 01:56:19,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:56:19" (1/1) ... [2018-12-03 01:56:19,204 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:56:19" (1/1) ... [2018-12-03 01:56:19,207 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:56:19" (1/1) ... [2018-12-03 01:56:19,208 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:56:19" (1/1) ... [2018-12-03 01:56:19,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:56:19" (1/1) ... [2018-12-03 01:56:19,209 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 01:56:19,210 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 01:56:19,210 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 01:56:19,210 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 01:56:19,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:56:19" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/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 [2018-12-03 01:56:19,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-03 01:56:19,240 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2018-12-03 01:56:19,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2018-12-03 01:56:19,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-03 01:56:19,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-03 01:56:19,241 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-03 01:56:19,241 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-03 01:56:19,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-03 01:56:19,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2018-12-03 01:56:19,241 INFO L130 BoogieDeclarations]: Found specification of procedure entry_point [2018-12-03 01:56:19,241 INFO L138 BoogieDeclarations]: Found implementation of procedure entry_point [2018-12-03 01:56:19,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-03 01:56:19,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-03 01:56:19,352 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-03 01:56:19,352 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-03 01:56:19,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 01:56:19 BoogieIcfgContainer [2018-12-03 01:56:19,353 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 01:56:19,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 01:56:19,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 01:56:19,355 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 01:56:19,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 01:56:18" (1/3) ... [2018-12-03 01:56:19,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ae5250 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 01:56:19, skipping insertion in model container [2018-12-03 01:56:19,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:56:19" (2/3) ... [2018-12-03 01:56:19,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ae5250 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 01:56:19, skipping insertion in model container [2018-12-03 01:56:19,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 01:56:19" (3/3) ... [2018-12-03 01:56:19,357 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test4_true-valid-memsafety_true-termination.i [2018-12-03 01:56:19,363 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 01:56:19,368 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2018-12-03 01:56:19,377 INFO L257 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2018-12-03 01:56:19,391 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 01:56:19,391 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-03 01:56:19,391 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 01:56:19,391 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 01:56:19,391 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 01:56:19,391 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 01:56:19,391 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 01:56:19,392 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 01:56:19,400 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2018-12-03 01:56:19,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-03 01:56:19,407 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 01:56:19,407 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 01:56:19,409 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-03 01:56:19,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 01:56:19,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1461646450, now seen corresponding path program 1 times [2018-12-03 01:56:19,414 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 01:56:19,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 01:56:19,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 01:56:19,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 01:56:19,447 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 01:56:19,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 01:56:19,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 01:56:19,535 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 01:56:19,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-03 01:56:19,535 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 01:56:19,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 01:56:19,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 01:56:19,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 01:56:19,549 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2018-12-03 01:56:19,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 01:56:19,588 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2018-12-03 01:56:19,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 01:56:19,590 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2018-12-03 01:56:19,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 01:56:19,596 INFO L225 Difference]: With dead ends: 45 [2018-12-03 01:56:19,597 INFO L226 Difference]: Without dead ends: 42 [2018-12-03 01:56:19,598 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 01:56:19,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-12-03 01:56:19,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2018-12-03 01:56:19,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-12-03 01:56:19,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2018-12-03 01:56:19,628 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 16 [2018-12-03 01:56:19,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 01:56:19,629 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2018-12-03 01:56:19,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 01:56:19,629 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2018-12-03 01:56:19,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-03 01:56:19,630 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 01:56:19,630 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 01:56:19,630 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-03 01:56:19,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 01:56:19,631 INFO L82 PathProgramCache]: Analyzing trace with hash 281163885, now seen corresponding path program 1 times [2018-12-03 01:56:19,631 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 01:56:19,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 01:56:19,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 01:56:19,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 01:56:19,633 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 01:56:19,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 01:56:19,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 01:56:19,659 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 01:56:19,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 01:56:19,660 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 01:56:19,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 01:56:19,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 01:56:19,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 01:56:19,661 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 3 states. [2018-12-03 01:56:19,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 01:56:19,694 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2018-12-03 01:56:19,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 01:56:19,695 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2018-12-03 01:56:19,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 01:56:19,695 INFO L225 Difference]: With dead ends: 40 [2018-12-03 01:56:19,695 INFO L226 Difference]: Without dead ends: 37 [2018-12-03 01:56:19,696 INFO L631 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 [2018-12-03 01:56:19,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-12-03 01:56:19,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 27. [2018-12-03 01:56:19,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-03 01:56:19,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-12-03 01:56:19,698 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 16 [2018-12-03 01:56:19,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 01:56:19,698 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-12-03 01:56:19,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 01:56:19,699 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-12-03 01:56:19,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-12-03 01:56:19,699 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 01:56:19,699 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 01:56:19,699 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-03 01:56:19,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 01:56:19,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1352899899, now seen corresponding path program 1 times [2018-12-03 01:56:19,699 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 01:56:19,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 01:56:19,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 01:56:19,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 01:56:19,701 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 01:56:19,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 01:56:19,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-03 01:56:19,730 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 01:56:19,730 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-03 01:56:19,731 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 01:56:19,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 01:56:19,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 01:56:19,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 01:56:19,731 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 5 states. [2018-12-03 01:56:19,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 01:56:19,737 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2018-12-03 01:56:19,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 01:56:19,737 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-12-03 01:56:19,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 01:56:19,737 INFO L225 Difference]: With dead ends: 26 [2018-12-03 01:56:19,737 INFO L226 Difference]: Without dead ends: 26 [2018-12-03 01:56:19,738 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 01:56:19,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-12-03 01:56:19,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-12-03 01:56:19,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-03 01:56:19,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-12-03 01:56:19,740 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 20 [2018-12-03 01:56:19,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 01:56:19,740 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-12-03 01:56:19,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 01:56:19,740 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-12-03 01:56:19,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-12-03 01:56:19,740 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 01:56:19,740 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 01:56:19,741 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-03 01:56:19,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 01:56:19,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1009776145, now seen corresponding path program 1 times [2018-12-03 01:56:19,741 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 01:56:19,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 01:56:19,742 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 01:56:19,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 01:56:19,742 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 01:56:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 01:56:19,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-03 01:56:19,781 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 01:56:19,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-03 01:56:19,781 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 01:56:19,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 01:56:19,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 01:56:19,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 01:56:19,782 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 5 states. [2018-12-03 01:56:19,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 01:56:19,811 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2018-12-03 01:56:19,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 01:56:19,812 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2018-12-03 01:56:19,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 01:56:19,812 INFO L225 Difference]: With dead ends: 31 [2018-12-03 01:56:19,812 INFO L226 Difference]: Without dead ends: 31 [2018-12-03 01:56:19,813 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 01:56:19,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-12-03 01:56:19,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-12-03 01:56:19,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-12-03 01:56:19,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-12-03 01:56:19,816 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 21 [2018-12-03 01:56:19,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 01:56:19,816 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-12-03 01:56:19,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 01:56:19,816 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-12-03 01:56:19,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-12-03 01:56:19,817 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 01:56:19,817 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 01:56:19,817 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-03 01:56:19,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 01:56:19,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1038405296, now seen corresponding path program 1 times [2018-12-03 01:56:19,818 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 01:56:19,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 01:56:19,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 01:56:19,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 01:56:19,819 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 01:56:19,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 01:56:19,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-03 01:56:19,852 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 01:56:19,852 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-03 01:56:19,852 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 01:56:19,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 01:56:19,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 01:56:19,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 01:56:19,853 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 5 states. [2018-12-03 01:56:19,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 01:56:19,860 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-12-03 01:56:19,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 01:56:19,860 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2018-12-03 01:56:19,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 01:56:19,861 INFO L225 Difference]: With dead ends: 36 [2018-12-03 01:56:19,861 INFO L226 Difference]: Without dead ends: 36 [2018-12-03 01:56:19,861 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 01:56:19,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-03 01:56:19,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 25. [2018-12-03 01:56:19,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-03 01:56:19,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-12-03 01:56:19,864 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2018-12-03 01:56:19,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 01:56:19,864 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-12-03 01:56:19,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 01:56:19,864 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-12-03 01:56:19,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-03 01:56:19,864 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 01:56:19,865 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 01:56:19,865 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-03 01:56:19,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 01:56:19,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1238289479, now seen corresponding path program 1 times [2018-12-03 01:56:19,865 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 01:56:19,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 01:56:19,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 01:56:19,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 01:56:19,866 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 01:56:19,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 01:56:19,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-03 01:56:19,893 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 01:56:19,893 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 01:56:19,894 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 23 with the following transitions: [2018-12-03 01:56:19,895 INFO L205 CegarAbsIntRunner]: [0], [3], [5], [6], [7], [15], [18], [20], [22], [24], [25], [33], [34], [35], [37], [39], [40], [41], [42] [2018-12-03 01:56:19,914 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-03 01:56:19,914 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 01:56:19,999 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-03 01:56:20,000 INFO L272 AbstractInterpreter]: Visited 19 different actions 22 times. Never merged. Never widened. Performed 174 root evaluator evaluations with a maximum evaluation depth of 3. Performed 174 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 24 variables. [2018-12-03 01:56:20,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 01:56:20,005 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-03 01:56:20,048 INFO L227 lantSequenceWeakener]: Weakened 20 states. On average, predicates are now at 92.01% of their original sizes. [2018-12-03 01:56:20,049 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-03 01:56:20,080 INFO L418 sIntCurrentIteration]: We unified 21 AI predicates to 21 [2018-12-03 01:56:20,080 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-03 01:56:20,080 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-03 01:56:20,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 11 [2018-12-03 01:56:20,081 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 01:56:20,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-03 01:56:20,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-03 01:56:20,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-12-03 01:56:20,082 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 9 states. [2018-12-03 01:56:20,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 01:56:20,210 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2018-12-03 01:56:20,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-03 01:56:20,210 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2018-12-03 01:56:20,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 01:56:20,211 INFO L225 Difference]: With dead ends: 24 [2018-12-03 01:56:20,211 INFO L226 Difference]: Without dead ends: 24 [2018-12-03 01:56:20,211 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-12-03 01:56:20,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-12-03 01:56:20,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-12-03 01:56:20,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-03 01:56:20,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-12-03 01:56:20,214 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2018-12-03 01:56:20,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 01:56:20,214 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-12-03 01:56:20,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-03 01:56:20,214 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-12-03 01:56:20,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-03 01:56:20,215 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 01:56:20,215 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 01:56:20,215 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-03 01:56:20,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 01:56:20,216 INFO L82 PathProgramCache]: Analyzing trace with hash -267731757, now seen corresponding path program 1 times [2018-12-03 01:56:20,216 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 01:56:20,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 01:56:20,217 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 01:56:20,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 01:56:20,217 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 01:56:20,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 01:56:20,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 01:56:20,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 01:56:20,326 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 01:56:20,326 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 24 with the following transitions: [2018-12-03 01:56:20,326 INFO L205 CegarAbsIntRunner]: [0], [3], [5], [6], [7], [15], [18], [20], [22], [24], [26], [27], [33], [34], [35], [37], [39], [40], [41], [42] [2018-12-03 01:56:20,327 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-03 01:56:20,327 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 01:56:20,345 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 01:56:20,346 INFO L272 AbstractInterpreter]: Visited 20 different actions 23 times. Never merged. Never widened. Performed 179 root evaluator evaluations with a maximum evaluation depth of 3. Performed 179 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 24 variables. [2018-12-03 01:56:20,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 01:56:20,348 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 01:56:20,348 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 01:56:20,348 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 01:56:20,356 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 01:56:20,356 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 01:56:20,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 01:56:20,377 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 01:56:20,402 INFO L478 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 [2018-12-03 01:56:20,403 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-03 01:56:20,404 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 01:56:20,405 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-12-03 01:56:20,421 INFO L701 Elim1Store]: detected not equals via solver [2018-12-03 01:56:20,422 INFO L701 Elim1Store]: detected not equals via solver [2018-12-03 01:56:20,423 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 21 [2018-12-03 01:56:20,423 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-03 01:56:20,429 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 01:56:20,429 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:15 [2018-12-03 01:56:20,460 INFO L701 Elim1Store]: detected not equals via solver [2018-12-03 01:56:20,461 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 21 [2018-12-03 01:56:20,461 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-03 01:56:20,465 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-03 01:56:20,466 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:11 [2018-12-03 01:56:20,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 01:56:20,482 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 01:56:20,531 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-12-03 01:56:20,565 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-12-03 01:56:20,570 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-12-03 01:56:20,613 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-12-03 01:56:20,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 01:56:20,689 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-03 01:56:20,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 9] total 17 [2018-12-03 01:56:20,689 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 01:56:20,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-03 01:56:20,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-03 01:56:20,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2018-12-03 01:56:20,690 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2018-12-03 01:56:20,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 01:56:20,766 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2018-12-03 01:56:20,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-03 01:56:20,766 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2018-12-03 01:56:20,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 01:56:20,767 INFO L225 Difference]: With dead ends: 40 [2018-12-03 01:56:20,767 INFO L226 Difference]: Without dead ends: 40 [2018-12-03 01:56:20,767 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2018-12-03 01:56:20,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-12-03 01:56:20,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2018-12-03 01:56:20,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-03 01:56:20,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2018-12-03 01:56:20,769 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 23 [2018-12-03 01:56:20,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 01:56:20,769 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2018-12-03 01:56:20,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-03 01:56:20,770 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2018-12-03 01:56:20,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-03 01:56:20,770 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 01:56:20,770 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 01:56:20,770 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-03 01:56:20,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 01:56:20,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1475078578, now seen corresponding path program 1 times [2018-12-03 01:56:20,770 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 01:56:20,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 01:56:20,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 01:56:20,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 01:56:20,771 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 01:56:20,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 01:56:20,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 01:56:20,828 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 01:56:20,828 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 01:56:20,828 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 24 with the following transitions: [2018-12-03 01:56:20,828 INFO L205 CegarAbsIntRunner]: [0], [3], [4], [5], [6], [7], [15], [18], [20], [22], [24], [26], [27], [33], [34], [35], [37], [39], [40], [41], [42] [2018-12-03 01:56:20,829 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-03 01:56:20,830 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 01:56:20,862 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 01:56:20,862 INFO L272 AbstractInterpreter]: Visited 21 different actions 29 times. Merged at 2 different actions 4 times. Never widened. Performed 199 root evaluator evaluations with a maximum evaluation depth of 3. Performed 199 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 24 variables. [2018-12-03 01:56:20,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 01:56:20,867 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 01:56:20,867 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 01:56:20,867 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 01:56:20,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 01:56:20,876 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 01:56:20,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 01:56:20,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 01:56:20,895 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2018-12-03 01:56:20,896 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-03 01:56:20,898 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 01:56:20,899 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:10 [2018-12-03 01:56:20,932 INFO L701 Elim1Store]: detected not equals via solver [2018-12-03 01:56:20,933 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 21 [2018-12-03 01:56:20,933 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-03 01:56:20,938 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 01:56:20,938 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:11 [2018-12-03 01:56:20,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 01:56:20,951 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 01:56:21,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 01:56:21,049 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 01:56:21,049 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2018-12-03 01:56:21,049 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 01:56:21,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-03 01:56:21,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-03 01:56:21,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=166, Unknown=1, NotChecked=0, Total=210 [2018-12-03 01:56:21,050 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 13 states. [2018-12-03 01:56:21,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 01:56:21,137 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2018-12-03 01:56:21,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-03 01:56:21,138 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2018-12-03 01:56:21,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 01:56:21,138 INFO L225 Difference]: With dead ends: 42 [2018-12-03 01:56:21,138 INFO L226 Difference]: Without dead ends: 42 [2018-12-03 01:56:21,138 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=189, Unknown=1, NotChecked=0, Total=240 [2018-12-03 01:56:21,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-12-03 01:56:21,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2018-12-03 01:56:21,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-03 01:56:21,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2018-12-03 01:56:21,141 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 23 [2018-12-03 01:56:21,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 01:56:21,141 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2018-12-03 01:56:21,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-03 01:56:21,141 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2018-12-03 01:56:21,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-03 01:56:21,141 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 01:56:21,141 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 01:56:21,141 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-03 01:56:21,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 01:56:21,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1239820052, now seen corresponding path program 2 times [2018-12-03 01:56:21,142 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 01:56:21,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 01:56:21,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 01:56:21,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 01:56:21,143 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 01:56:21,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 01:56:21,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-03 01:56:21,169 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 01:56:21,169 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 01:56:21,169 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 01:56:21,169 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 01:56:21,169 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 01:56:21,169 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 01:56:21,176 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 01:56:21,176 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 01:56:21,187 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-12-03 01:56:21,187 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 01:56:21,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 01:56:21,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-03 01:56:21,213 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 01:56:21,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-03 01:56:21,248 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 01:56:21,248 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2018-12-03 01:56:21,248 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 01:56:21,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-03 01:56:21,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-03 01:56:21,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-12-03 01:56:21,248 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 8 states. [2018-12-03 01:56:21,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 01:56:21,256 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-12-03 01:56:21,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 01:56:21,256 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2018-12-03 01:56:21,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 01:56:21,257 INFO L225 Difference]: With dead ends: 27 [2018-12-03 01:56:21,257 INFO L226 Difference]: Without dead ends: 25 [2018-12-03 01:56:21,257 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-12-03 01:56:21,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-12-03 01:56:21,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-12-03 01:56:21,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-03 01:56:21,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-12-03 01:56:21,259 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2018-12-03 01:56:21,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 01:56:21,259 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-12-03 01:56:21,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-03 01:56:21,259 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-12-03 01:56:21,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-03 01:56:21,259 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 01:56:21,259 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 01:56:21,260 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-03 01:56:21,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 01:56:21,260 INFO L82 PathProgramCache]: Analyzing trace with hash -242442381, now seen corresponding path program 1 times [2018-12-03 01:56:21,260 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 01:56:21,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 01:56:21,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 01:56:21,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 01:56:21,261 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 01:56:21,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 01:56:21,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-03 01:56:21,487 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 01:56:21,487 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 01:56:21,487 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 27 with the following transitions: [2018-12-03 01:56:21,487 INFO L205 CegarAbsIntRunner]: [0], [3], [5], [6], [7], [13], [15], [18], [20], [22], [24], [26], [28], [32], [33], [34], [35], [37], [38], [39], [40], [41], [42] [2018-12-03 01:56:21,488 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-03 01:56:21,488 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 01:56:21,511 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 01:56:21,511 INFO L272 AbstractInterpreter]: Visited 23 different actions 26 times. Never merged. Never widened. Performed 182 root evaluator evaluations with a maximum evaluation depth of 3. Performed 182 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 24 variables. [2018-12-03 01:56:21,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 01:56:21,513 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 01:56:21,513 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 01:56:21,513 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 01:56:21,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 01:56:21,520 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 01:56:21,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 01:56:21,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 01:56:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-03 01:56:24,742 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 01:56:25,029 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 01:56:25,031 FATAL L292 ToolchainWalker]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: This case should habe been handled by DER at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.DerPreprocessor.constructReplacement(DerPreprocessor.java:217) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.DerPreprocessor.constructReplacement(DerPreprocessor.java:209) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.DerPreprocessor.convert(DerPreprocessor.java:190) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.access$0(TermTransformer.java:127) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:253) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.Elim1Store.elim1(Elim1Store.java:211) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:221) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:247) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.ElimStorePlain.elimAllRec(ElimStorePlain.java:199) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:293) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:245) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:418) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:290) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.getTraceCheck(BaseTaipanRefinementStrategy.java:214) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:456) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2018-12-03 01:56:25,038 INFO L168 Benchmark]: Toolchain (without parser) took 6197.33 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 223.3 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -103.2 MB). Peak memory consumption was 120.2 MB. Max. memory is 11.5 GB. [2018-12-03 01:56:25,041 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 01:56:25,041 INFO L168 Benchmark]: CACSL2BoogieTranslator took 334.51 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.2 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -174.2 MB). Peak memory consumption was 25.5 MB. Max. memory is 11.5 GB. [2018-12-03 01:56:25,043 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.34 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 11.5 GB. [2018-12-03 01:56:25,044 INFO L168 Benchmark]: Boogie Preprocessor took 12.95 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 01:56:25,045 INFO L168 Benchmark]: RCFGBuilder took 143.29 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 11.5 GB. [2018-12-03 01:56:25,047 INFO L168 Benchmark]: TraceAbstraction took 5683.37 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 78.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 45.0 MB). Peak memory consumption was 123.2 MB. Max. memory is 11.5 GB. [2018-12-03 01:56:25,057 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 334.51 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.2 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -174.2 MB). Peak memory consumption was 25.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 20.34 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.95 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 143.29 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5683.37 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 78.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 45.0 MB). Peak memory consumption was 123.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: This case should habe been handled by DER de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: This case should habe been handled by DER: de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.DerPreprocessor.constructReplacement(DerPreprocessor.java:217) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-635dfa2 [2018-12-03 01:56:26,362 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 01:56:26,363 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 01:56:26,369 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 01:56:26,369 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 01:56:26,370 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 01:56:26,371 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 01:56:26,371 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 01:56:26,372 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 01:56:26,372 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 01:56:26,373 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-03 01:56:26,373 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-03 01:56:26,373 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-03 01:56:26,374 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-03 01:56:26,375 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-03 01:56:26,375 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-03 01:56:26,375 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-03 01:56:26,376 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-03 01:56:26,377 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-03 01:56:26,378 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-03 01:56:26,378 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-03 01:56:26,379 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-03 01:56:26,380 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-03 01:56:26,380 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-03 01:56:26,380 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-03 01:56:26,381 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-03 01:56:26,381 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-03 01:56:26,381 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-03 01:56:26,382 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-03 01:56:26,382 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-03 01:56:26,382 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-03 01:56:26,383 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-03 01:56:26,383 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-03 01:56:26,383 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-03 01:56:26,383 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-03 01:56:26,384 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-03 01:56:26,384 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2018-12-03 01:56:26,391 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 01:56:26,392 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 01:56:26,392 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 01:56:26,392 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 01:56:26,392 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 01:56:26,392 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 01:56:26,393 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-03 01:56:26,393 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-03 01:56:26,393 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-03 01:56:26,393 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 01:56:26,393 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-03 01:56:26,393 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-03 01:56:26,393 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 01:56:26,394 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 01:56:26,394 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-03 01:56:26,394 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 01:56:26,394 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 01:56:26,394 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 01:56:26,394 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-03 01:56:26,394 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-03 01:56:26,394 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-03 01:56:26,394 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 01:56:26,394 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-12-03 01:56:26,394 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-12-03 01:56:26,395 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 01:56:26,395 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-03 01:56:26,395 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 01:56:26,395 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 01:56:26,395 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-03 01:56:26,395 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 01:56:26,395 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 01:56:26,395 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 01:56:26,395 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 01:56:26,395 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-12-03 01:56:26,395 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 01:56:26,396 INFO L133 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2018-12-03 01:56:26,396 INFO L133 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_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/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 -> ed29e343041979fe95e5835578848b9a30317117 [2018-12-03 01:56:26,414 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 01:56:26,423 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 01:56:26,426 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 01:56:26,427 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-03 01:56:26,427 INFO L276 PluginConnector]: CDTParser initialized [2018-12-03 01:56:26,428 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/utaipan/../../sv-benchmarks/c/ldv-memsafety/memleaks_test4_true-valid-memsafety_true-termination.i [2018-12-03 01:56:26,473 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/utaipan/data/08b9a142b/5bdce0d3c1e74a5ba9ddc3c65780da0a/FLAG3153c27ad [2018-12-03 01:56:26,847 INFO L307 CDTParser]: Found 1 translation units. [2018-12-03 01:56:26,847 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/sv-benchmarks/c/ldv-memsafety/memleaks_test4_true-valid-memsafety_true-termination.i [2018-12-03 01:56:26,855 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/utaipan/data/08b9a142b/5bdce0d3c1e74a5ba9ddc3c65780da0a/FLAG3153c27ad [2018-12-03 01:56:26,863 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/utaipan/data/08b9a142b/5bdce0d3c1e74a5ba9ddc3c65780da0a [2018-12-03 01:56:26,865 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 01:56:26,865 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-03 01:56:26,866 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-03 01:56:26,866 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-03 01:56:26,868 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-03 01:56:26,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 01:56:26" (1/1) ... [2018-12-03 01:56:26,870 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d255691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:56:26, skipping insertion in model container [2018-12-03 01:56:26,870 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 01:56:26" (1/1) ... [2018-12-03 01:56:26,874 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-03 01:56:26,903 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-03 01:56:27,119 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-03 01:56:27,165 INFO L191 MainTranslator]: Completed pre-run [2018-12-03 01:56:27,200 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-03 01:56:27,233 INFO L195 MainTranslator]: Completed translation [2018-12-03 01:56:27,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:56:27 WrapperNode [2018-12-03 01:56:27,233 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-03 01:56:27,234 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 01:56:27,234 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 01:56:27,234 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 01:56:27,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:56:27" (1/1) ... [2018-12-03 01:56:27,250 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:56:27" (1/1) ... [2018-12-03 01:56:27,255 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 01:56:27,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 01:56:27,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 01:56:27,255 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 01:56:27,261 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:56:27" (1/1) ... [2018-12-03 01:56:27,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:56:27" (1/1) ... [2018-12-03 01:56:27,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:56:27" (1/1) ... [2018-12-03 01:56:27,262 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:56:27" (1/1) ... [2018-12-03 01:56:27,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:56:27" (1/1) ... [2018-12-03 01:56:27,268 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:56:27" (1/1) ... [2018-12-03 01:56:27,269 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:56:27" (1/1) ... [2018-12-03 01:56:27,270 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 01:56:27,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 01:56:27,270 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 01:56:27,270 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 01:56:27,271 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:56:27" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/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 [2018-12-03 01:56:27,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-03 01:56:27,301 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2018-12-03 01:56:27,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2018-12-03 01:56:27,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-03 01:56:27,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-03 01:56:27,301 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-03 01:56:27,301 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-03 01:56:27,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-03 01:56:27,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2018-12-03 01:56:27,302 INFO L130 BoogieDeclarations]: Found specification of procedure entry_point [2018-12-03 01:56:27,302 INFO L138 BoogieDeclarations]: Found implementation of procedure entry_point [2018-12-03 01:56:27,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-03 01:56:27,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-03 01:56:27,420 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-03 01:56:27,420 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-03 01:56:27,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 01:56:27 BoogieIcfgContainer [2018-12-03 01:56:27,421 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 01:56:27,421 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 01:56:27,421 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 01:56:27,423 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 01:56:27,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 01:56:26" (1/3) ... [2018-12-03 01:56:27,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@333456ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 01:56:27, skipping insertion in model container [2018-12-03 01:56:27,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:56:27" (2/3) ... [2018-12-03 01:56:27,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@333456ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 01:56:27, skipping insertion in model container [2018-12-03 01:56:27,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 01:56:27" (3/3) ... [2018-12-03 01:56:27,425 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test4_true-valid-memsafety_true-termination.i [2018-12-03 01:56:27,430 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 01:56:27,434 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2018-12-03 01:56:27,443 INFO L257 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2018-12-03 01:56:27,456 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-03 01:56:27,457 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 01:56:27,457 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-03 01:56:27,457 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 01:56:27,457 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 01:56:27,457 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 01:56:27,457 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 01:56:27,457 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 01:56:27,457 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 01:56:27,465 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2018-12-03 01:56:27,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-03 01:56:27,470 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 01:56:27,470 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 01:56:27,472 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-03 01:56:27,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 01:56:27,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1461646450, now seen corresponding path program 1 times [2018-12-03 01:56:27,478 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-03 01:56:27,479 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/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 [2018-12-03 01:56:27,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 01:56:27,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 01:56:27,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 01:56:27,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 01:56:27,691 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 01:56:27,693 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 01:56:27,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-03 01:56:27,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 01:56:27,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 01:56:27,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 01:56:27,705 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2018-12-03 01:56:27,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 01:56:27,742 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2018-12-03 01:56:27,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 01:56:27,743 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2018-12-03 01:56:27,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 01:56:27,752 INFO L225 Difference]: With dead ends: 45 [2018-12-03 01:56:27,752 INFO L226 Difference]: Without dead ends: 42 [2018-12-03 01:56:27,754 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 01:56:27,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-12-03 01:56:27,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2018-12-03 01:56:27,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-12-03 01:56:27,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2018-12-03 01:56:27,783 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 16 [2018-12-03 01:56:27,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 01:56:27,784 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2018-12-03 01:56:27,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 01:56:27,784 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2018-12-03 01:56:27,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-03 01:56:27,785 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 01:56:27,785 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 01:56:27,786 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-03 01:56:27,786 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 01:56:27,786 INFO L82 PathProgramCache]: Analyzing trace with hash 281163885, now seen corresponding path program 1 times [2018-12-03 01:56:27,787 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-03 01:56:27,787 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/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 [2018-12-03 01:56:27,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 01:56:27,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 01:56:27,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 01:56:27,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 01:56:27,828 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 01:56:27,830 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 01:56:27,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-03 01:56:27,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-03 01:56:27,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-03 01:56:27,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 01:56:27,831 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 3 states. [2018-12-03 01:56:27,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 01:56:27,868 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2018-12-03 01:56:27,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-03 01:56:27,869 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2018-12-03 01:56:27,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 01:56:27,870 INFO L225 Difference]: With dead ends: 40 [2018-12-03 01:56:27,870 INFO L226 Difference]: Without dead ends: 37 [2018-12-03 01:56:27,871 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-03 01:56:27,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-12-03 01:56:27,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 27. [2018-12-03 01:56:27,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-03 01:56:27,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-12-03 01:56:27,875 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 16 [2018-12-03 01:56:27,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 01:56:27,876 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-12-03 01:56:27,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-03 01:56:27,876 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-12-03 01:56:27,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-12-03 01:56:27,877 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 01:56:27,877 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 01:56:27,877 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-03 01:56:27,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 01:56:27,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1352899899, now seen corresponding path program 1 times [2018-12-03 01:56:27,878 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-03 01:56:27,878 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/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 [2018-12-03 01:56:27,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 01:56:27,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 01:56:27,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 01:56:27,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-03 01:56:27,942 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 01:56:27,943 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 01:56:27,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-03 01:56:27,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 01:56:27,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 01:56:27,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 01:56:27,944 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 5 states. [2018-12-03 01:56:27,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 01:56:27,951 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2018-12-03 01:56:27,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 01:56:27,951 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-12-03 01:56:27,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 01:56:27,952 INFO L225 Difference]: With dead ends: 26 [2018-12-03 01:56:27,952 INFO L226 Difference]: Without dead ends: 26 [2018-12-03 01:56:27,952 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 01:56:27,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-12-03 01:56:27,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-12-03 01:56:27,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-03 01:56:27,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-12-03 01:56:27,954 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 20 [2018-12-03 01:56:27,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 01:56:27,954 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-12-03 01:56:27,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 01:56:27,955 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-12-03 01:56:27,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-12-03 01:56:27,955 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 01:56:27,955 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 01:56:27,955 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-03 01:56:27,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 01:56:27,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1009776145, now seen corresponding path program 1 times [2018-12-03 01:56:27,956 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-03 01:56:27,956 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-03 01:56:27,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 01:56:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 01:56:28,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 01:56:28,025 INFO L478 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 [2018-12-03 01:56:28,027 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-03 01:56:28,029 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 01:56:28,029 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-12-03 01:56:28,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-03 01:56:28,048 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 01:56:28,049 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 01:56:28,049 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-03 01:56:28,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 01:56:28,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 01:56:28,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 01:56:28,050 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 5 states. [2018-12-03 01:56:28,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 01:56:28,083 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2018-12-03 01:56:28,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 01:56:28,084 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2018-12-03 01:56:28,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 01:56:28,085 INFO L225 Difference]: With dead ends: 31 [2018-12-03 01:56:28,085 INFO L226 Difference]: Without dead ends: 31 [2018-12-03 01:56:28,085 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 01:56:28,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-12-03 01:56:28,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-12-03 01:56:28,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-12-03 01:56:28,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-12-03 01:56:28,087 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 21 [2018-12-03 01:56:28,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 01:56:28,088 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-12-03 01:56:28,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 01:56:28,088 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-12-03 01:56:28,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-12-03 01:56:28,088 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 01:56:28,088 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 01:56:28,089 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-03 01:56:28,089 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 01:56:28,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1038405296, now seen corresponding path program 1 times [2018-12-03 01:56:28,089 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-03 01:56:28,089 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/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 [2018-12-03 01:56:28,103 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 01:56:28,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 01:56:28,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 01:56:28,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-03 01:56:28,135 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 01:56:28,136 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 01:56:28,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-03 01:56:28,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 01:56:28,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 01:56:28,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 01:56:28,137 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 5 states. [2018-12-03 01:56:28,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 01:56:28,148 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-12-03 01:56:28,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 01:56:28,149 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2018-12-03 01:56:28,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 01:56:28,149 INFO L225 Difference]: With dead ends: 36 [2018-12-03 01:56:28,149 INFO L226 Difference]: Without dead ends: 36 [2018-12-03 01:56:28,150 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 01:56:28,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-03 01:56:28,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 25. [2018-12-03 01:56:28,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-03 01:56:28,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-12-03 01:56:28,152 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2018-12-03 01:56:28,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 01:56:28,152 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-12-03 01:56:28,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 01:56:28,153 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-12-03 01:56:28,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-03 01:56:28,153 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 01:56:28,153 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 01:56:28,154 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-03 01:56:28,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 01:56:28,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1238289479, now seen corresponding path program 1 times [2018-12-03 01:56:28,154 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-03 01:56:28,154 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/utaipan/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-03 01:56:28,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 01:56:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 01:56:28,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 01:56:28,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-03 01:56:28,212 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 01:56:28,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-03 01:56:28,241 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 01:56:28,241 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 01:56:28,247 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 01:56:28,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 01:56:28,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 01:56:28,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-03 01:56:28,263 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 01:56:28,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-03 01:56:28,312 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-03 01:56:28,312 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4] total 4 [2018-12-03 01:56:28,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 01:56:28,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 01:56:28,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 01:56:28,312 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 5 states. [2018-12-03 01:56:28,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 01:56:28,327 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2018-12-03 01:56:28,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 01:56:28,328 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-12-03 01:56:28,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 01:56:28,328 INFO L225 Difference]: With dead ends: 24 [2018-12-03 01:56:28,328 INFO L226 Difference]: Without dead ends: 24 [2018-12-03 01:56:28,328 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 01:56:28,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-12-03 01:56:28,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-12-03 01:56:28,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-03 01:56:28,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-12-03 01:56:28,330 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2018-12-03 01:56:28,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 01:56:28,330 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-12-03 01:56:28,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 01:56:28,330 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-12-03 01:56:28,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-03 01:56:28,331 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 01:56:28,331 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 01:56:28,331 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-03 01:56:28,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 01:56:28,331 INFO L82 PathProgramCache]: Analyzing trace with hash -267731757, now seen corresponding path program 1 times [2018-12-03 01:56:28,331 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-03 01:56:28,332 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/utaipan/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-03 01:56:28,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 01:56:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 01:56:28,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 01:56:28,392 INFO L478 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 [2018-12-03 01:56:28,392 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-03 01:56:28,394 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 01:56:28,394 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-12-03 01:56:28,426 INFO L701 Elim1Store]: detected not equals via solver [2018-12-03 01:56:28,427 INFO L701 Elim1Store]: detected not equals via solver [2018-12-03 01:56:28,428 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 21 [2018-12-03 01:56:28,428 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-03 01:56:28,435 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 01:56:28,435 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:16 [2018-12-03 01:56:28,472 INFO L683 Elim1Store]: detected equality via solver [2018-12-03 01:56:28,473 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 21 [2018-12-03 01:56:28,473 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-03 01:56:28,481 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-03 01:56:28,482 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:12 [2018-12-03 01:56:28,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 01:56:28,551 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 01:56:28,552 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 01:56:28,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-12-03 01:56:28,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-03 01:56:28,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-03 01:56:28,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-12-03 01:56:28,553 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2018-12-03 01:56:30,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 01:56:30,666 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2018-12-03 01:56:30,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-03 01:56:30,666 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2018-12-03 01:56:30,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 01:56:30,667 INFO L225 Difference]: With dead ends: 40 [2018-12-03 01:56:30,667 INFO L226 Difference]: Without dead ends: 40 [2018-12-03 01:56:30,667 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-12-03 01:56:30,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-12-03 01:56:30,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2018-12-03 01:56:30,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-03 01:56:30,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2018-12-03 01:56:30,670 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 23 [2018-12-03 01:56:30,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 01:56:30,670 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2018-12-03 01:56:30,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-03 01:56:30,670 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2018-12-03 01:56:30,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-03 01:56:30,671 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 01:56:30,671 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 01:56:30,671 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-03 01:56:30,671 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 01:56:30,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1475078578, now seen corresponding path program 1 times [2018-12-03 01:56:30,672 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-03 01:56:30,672 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/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 [2018-12-03 01:56:30,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 01:56:30,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 01:56:30,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 01:56:30,727 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2018-12-03 01:56:30,727 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-03 01:56:30,732 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 01:56:30,732 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:10 [2018-12-03 01:56:30,795 INFO L701 Elim1Store]: detected not equals via solver [2018-12-03 01:56:30,796 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 23 [2018-12-03 01:56:30,796 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-03 01:56:30,802 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 01:56:30,802 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:13 [2018-12-03 01:56:30,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 01:56:30,813 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 01:56:30,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 01:56:30,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 01:56:30,923 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 01:56:30,929 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 01:56:30,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 01:56:30,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 01:56:30,943 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2018-12-03 01:56:30,943 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-03 01:56:30,946 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 01:56:30,947 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:10 [2018-12-03 01:56:30,955 INFO L701 Elim1Store]: detected not equals via solver [2018-12-03 01:56:30,955 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 23 [2018-12-03 01:56:30,956 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-03 01:56:30,964 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 01:56:30,965 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:13 [2018-12-03 01:56:30,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 01:56:30,966 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 01:56:31,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 01:56:31,057 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-03 01:56:31,057 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9] total 14 [2018-12-03 01:56:31,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-03 01:56:31,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-03 01:56:31,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=164, Unknown=3, NotChecked=0, Total=210 [2018-12-03 01:56:31,058 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 15 states. [2018-12-03 01:56:31,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 01:56:31,503 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2018-12-03 01:56:31,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-03 01:56:31,504 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2018-12-03 01:56:31,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 01:56:31,504 INFO L225 Difference]: With dead ends: 42 [2018-12-03 01:56:31,505 INFO L226 Difference]: Without dead ends: 42 [2018-12-03 01:56:31,505 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=371, Unknown=5, NotChecked=0, Total=462 [2018-12-03 01:56:31,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-12-03 01:56:31,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2018-12-03 01:56:31,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-03 01:56:31,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2018-12-03 01:56:31,508 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 23 [2018-12-03 01:56:31,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 01:56:31,509 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2018-12-03 01:56:31,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-03 01:56:31,509 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2018-12-03 01:56:31,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-03 01:56:31,509 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 01:56:31,510 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 01:56:31,510 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-03 01:56:31,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 01:56:31,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1239820052, now seen corresponding path program 2 times [2018-12-03 01:56:31,510 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-03 01:56:31,510 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/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 [2018-12-03 01:56:31,527 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-12-03 01:56:31,557 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-03 01:56:31,557 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 01:56:31,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 01:56:31,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-03 01:56:31,572 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 01:56:31,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-03 01:56:31,585 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 01:56:31,585 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 01:56:31,592 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-03 01:56:31,602 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-03 01:56:31,603 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 01:56:31,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 01:56:31,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-03 01:56:31,605 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 01:56:31,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-03 01:56:31,634 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-03 01:56:31,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4] total 4 [2018-12-03 01:56:31,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 01:56:31,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 01:56:31,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 01:56:31,635 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 5 states. [2018-12-03 01:56:31,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 01:56:31,647 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2018-12-03 01:56:31,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 01:56:31,647 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2018-12-03 01:56:31,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 01:56:31,648 INFO L225 Difference]: With dead ends: 35 [2018-12-03 01:56:31,648 INFO L226 Difference]: Without dead ends: 35 [2018-12-03 01:56:31,648 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 01:56:31,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-12-03 01:56:31,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 23. [2018-12-03 01:56:31,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-03 01:56:31,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-12-03 01:56:31,650 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 23 [2018-12-03 01:56:31,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 01:56:31,650 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-12-03 01:56:31,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 01:56:31,650 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-12-03 01:56:31,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-03 01:56:31,650 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 01:56:31,650 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 01:56:31,650 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-03 01:56:31,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 01:56:31,651 INFO L82 PathProgramCache]: Analyzing trace with hash -242442381, now seen corresponding path program 1 times [2018-12-03 01:56:31,651 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-03 01:56:31,651 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/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 [2018-12-03 01:56:31,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 01:56:31,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 01:56:31,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 01:56:31,745 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2018-12-03 01:56:31,747 INFO L701 Elim1Store]: detected not equals via solver [2018-12-03 01:56:31,748 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2018-12-03 01:56:31,748 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-03 01:56:31,751 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 01:56:31,753 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2018-12-03 01:56:31,760 INFO L701 Elim1Store]: detected not equals via solver [2018-12-03 01:56:31,765 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 15 [2018-12-03 01:56:31,766 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2018-12-03 01:56:31,773 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-12-03 01:56:31,780 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2018-12-03 01:56:31,781 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:18, output treesize:19 [2018-12-03 01:56:39,053 WARN L180 SmtUtils]: Spent 3.84 s on a formula simplification that was a NOOP. DAG size: 24 [2018-12-03 01:56:42,229 WARN L180 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 19 [2018-12-03 01:56:43,154 WARN L854 $PredicateComparison]: unable to prove that (exists ((entry_point_~p~0.base (_ BitVec 32)) (v_prenex_2 (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| entry_point_~p~0.base (_ bv1 1)))) (let ((.cse1 (store .cse0 v_prenex_2 (_ bv0 1)))) (and (= (_ bv0 1) (select .cse0 v_prenex_2)) (= |c_#valid| (store .cse1 entry_point_~p~0.base (_ bv0 1))) (= (select |c_old(#valid)| entry_point_~p~0.base) (_ bv0 1)) (= (_ bv1 1) (select .cse1 entry_point_~p~0.base)) (not (= (_ bv0 32) entry_point_~p~0.base)))))) is different from true [2018-12-03 01:56:43,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-03 01:56:43,207 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-03 01:56:43,209 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 01:56:43,209 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2018-12-03 01:56:43,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-03 01:56:43,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-03 01:56:43,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=4, NotChecked=24, Total=210 [2018-12-03 01:56:43,210 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 15 states. [2018-12-03 01:56:55,636 WARN L180 SmtUtils]: Spent 3.76 s on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2018-12-03 01:57:03,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 01:57:03,744 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2018-12-03 01:57:03,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-03 01:57:03,745 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2018-12-03 01:57:03,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 01:57:03,745 INFO L225 Difference]: With dead ends: 42 [2018-12-03 01:57:03,745 INFO L226 Difference]: Without dead ends: 34 [2018-12-03 01:57:03,745 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=4, NotChecked=26, Total=240 [2018-12-03 01:57:03,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-12-03 01:57:03,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2018-12-03 01:57:03,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-12-03 01:57:03,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2018-12-03 01:57:03,748 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 26 [2018-12-03 01:57:03,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 01:57:03,748 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2018-12-03 01:57:03,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-03 01:57:03,748 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2018-12-03 01:57:03,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-03 01:57:03,749 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 01:57:03,749 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 01:57:03,749 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-03 01:57:03,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 01:57:03,749 INFO L82 PathProgramCache]: Analyzing trace with hash -2039393740, now seen corresponding path program 1 times [2018-12-03 01:57:03,749 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-03 01:57:03,749 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/utaipan/cvc4 Starting monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-03 01:57:03,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 01:57:03,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 01:57:03,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 01:57:03,832 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2018-12-03 01:57:03,839 INFO L701 Elim1Store]: detected not equals via solver [2018-12-03 01:57:03,840 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 21 [2018-12-03 01:57:03,840 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-03 01:57:03,851 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 01:57:03,859 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-03 01:57:03,859 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:18 [2018-12-03 01:57:03,869 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2018-12-03 01:57:03,871 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2018-12-03 01:57:03,871 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-03 01:57:03,872 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 01:57:03,875 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-03 01:57:03,876 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:20, output treesize:13 [2018-12-03 01:57:04,639 WARN L854 $PredicateComparison]: unable to prove that (exists ((entry_point_~p~0.base (_ BitVec 32))) (let ((.cse0 (store (store |c_old(#valid)| entry_point_~p~0.base (_ bv1 1)) (_ bv0 32) (_ bv0 1)))) (and (= |c_#valid| (store .cse0 entry_point_~p~0.base (_ bv0 1))) (= (_ bv1 1) (select .cse0 entry_point_~p~0.base)) (= (select |c_old(#valid)| entry_point_~p~0.base) (_ bv0 1)) (not (= (_ bv0 32) entry_point_~p~0.base))))) is different from true [2018-12-03 01:57:06,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-03 01:57:06,684 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 01:57:07,364 WARN L832 $PredicateComparison]: unable to prove that (forall ((v_entry_point_~p~0.base_14 (_ BitVec 32))) (or (= (_ bv0 32) v_entry_point_~p~0.base_14) (not (= (select |c_#valid| v_entry_point_~p~0.base_14) (_ bv0 1))) (= (store (store (store |c_#valid| v_entry_point_~p~0.base_14 (_ bv1 1)) (_ bv0 32) (_ bv0 1)) v_entry_point_~p~0.base_14 (_ bv0 1)) |c_old(#valid)|))) is different from false [2018-12-03 01:57:07,368 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 01:57:07,368 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 01:57:07,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 01:57:07,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 01:57:07,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 01:57:07,394 INFO L478 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2018-12-03 01:57:07,396 INFO L701 Elim1Store]: detected not equals via solver [2018-12-03 01:57:07,397 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 21 [2018-12-03 01:57:07,397 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-03 01:57:07,401 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-03 01:57:07,406 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-03 01:57:07,406 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:14, output treesize:11 [2018-12-03 01:57:09,490 WARN L854 $PredicateComparison]: unable to prove that (exists ((entry_point_~p~0.base (_ BitVec 32))) (and (= |c_#valid| (store (store (store |c_old(#valid)| entry_point_~p~0.base (_ bv1 1)) (_ bv0 32) (_ bv0 1)) entry_point_~p~0.base (_ bv0 1))) (= (select |c_old(#valid)| entry_point_~p~0.base) (_ bv0 1)))) is different from true [2018-12-03 01:57:09,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-03 01:57:09,503 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 01:57:10,510 WARN L832 $PredicateComparison]: unable to prove that (forall ((v_entry_point_~p~0.base_17 (_ BitVec 32))) (or (= (store (store (store |c_#valid| v_entry_point_~p~0.base_17 (_ bv1 1)) (_ bv0 32) (_ bv0 1)) v_entry_point_~p~0.base_17 (_ bv0 1)) |c_old(#valid)|) (not (= (_ bv0 1) (select |c_#valid| v_entry_point_~p~0.base_17))))) is different from false [2018-12-03 01:57:10,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-03 01:57:10,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 20 [2018-12-03 01:57:10,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-03 01:57:10,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-03 01:57:10,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=290, Unknown=5, NotChecked=148, Total=506 [2018-12-03 01:57:10,527 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 21 states. [2018-12-03 01:57:24,677 WARN L180 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 24 [2018-12-03 01:57:34,848 WARN L180 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2018-12-03 01:57:47,027 WARN L180 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2018-12-03 01:57:51,109 WARN L180 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2018-12-03 01:58:03,999 WARN L180 SmtUtils]: Spent 4.02 s on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2018-12-03 01:58:13,292 WARN L180 SmtUtils]: Spent 3.23 s on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2018-12-03 01:58:13,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 01:58:13,292 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2018-12-03 01:58:13,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-03 01:58:13,293 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2018-12-03 01:58:13,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 01:58:13,293 INFO L225 Difference]: With dead ends: 39 [2018-12-03 01:58:13,293 INFO L226 Difference]: Without dead ends: 28 [2018-12-03 01:58:13,293 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 40.7s TimeCoverageRelationStatistics Valid=133, Invalid=625, Unknown=14, NotChecked=220, Total=992 [2018-12-03 01:58:13,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-03 01:58:13,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2018-12-03 01:58:13,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-03 01:58:13,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-12-03 01:58:13,295 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 26 [2018-12-03 01:58:13,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 01:58:13,295 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-12-03 01:58:13,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-03 01:58:13,295 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-12-03 01:58:13,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-03 01:58:13,296 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 01:58:13,296 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 01:58:13,296 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, entry_pointErr3ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr0ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr1ASSERT_VIOLATIONMEMORY_FREE, entry_pointErr2ASSERT_VIOLATIONMEMORY_FREE]=== [2018-12-03 01:58:13,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 01:58:13,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1239514734, now seen corresponding path program 2 times [2018-12-03 01:58:13,296 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-03 01:58:13,297 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/utaipan/cvc4 Starting monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-03 01:58:13,312 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-12-03 01:58:13,345 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-03 01:58:13,346 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 01:58:13,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 01:58:13,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-03 01:58:13,365 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 01:58:13,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-03 01:58:13,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 01:58:13,392 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/utaipan/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 01:58:13,398 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-03 01:58:13,411 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-03 01:58:13,411 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 01:58:13,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 01:58:13,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-03 01:58:13,415 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 01:58:13,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-03 01:58:13,460 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-03 01:58:13,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6] total 6 [2018-12-03 01:58:13,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-03 01:58:13,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-03 01:58:13,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-12-03 01:58:13,460 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 6 states. [2018-12-03 01:58:13,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 01:58:13,472 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2018-12-03 01:58:13,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-03 01:58:13,472 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2018-12-03 01:58:13,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 01:58:13,472 INFO L225 Difference]: With dead ends: 20 [2018-12-03 01:58:13,472 INFO L226 Difference]: Without dead ends: 0 [2018-12-03 01:58:13,473 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-12-03 01:58:13,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-03 01:58:13,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-03 01:58:13,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-03 01:58:13,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-03 01:58:13,473 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2018-12-03 01:58:13,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 01:58:13,473 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-03 01:58:13,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-03 01:58:13,473 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-03 01:58:13,473 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-03 01:58:13,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 01:58:13 BoogieIcfgContainer [2018-12-03 01:58:13,476 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-03 01:58:13,476 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-03 01:58:13,476 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-03 01:58:13,476 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-03 01:58:13,477 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 01:56:27" (3/4) ... [2018-12-03 01:58:13,479 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-03 01:58:13,482 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ldv_malloc [2018-12-03 01:58:13,482 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-03 01:58:13,483 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-03 01:58:13,483 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure entry_point [2018-12-03 01:58:13,485 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2018-12-03 01:58:13,485 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2018-12-03 01:58:13,485 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-03 01:58:13,507 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_4426901a-d34b-4678-8f22-0f975ddb31c2/bin-2019/utaipan/witness.graphml [2018-12-03 01:58:13,507 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-03 01:58:13,508 INFO L168 Benchmark]: Toolchain (without parser) took 106642.98 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 202.4 MB). Free memory was 938.0 MB in the beginning and 1.2 GB in the end (delta: -248.2 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 01:58:13,508 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 01:58:13,508 INFO L168 Benchmark]: CACSL2BoogieTranslator took 367.35 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 938.0 MB in the beginning and 1.1 GB in the end (delta: -171.6 MB). Peak memory consumption was 37.4 MB. Max. memory is 11.5 GB. [2018-12-03 01:58:13,509 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.52 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 01:58:13,509 INFO L168 Benchmark]: Boogie Preprocessor took 14.75 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 01:58:13,509 INFO L168 Benchmark]: RCFGBuilder took 150.75 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. [2018-12-03 01:58:13,509 INFO L168 Benchmark]: TraceAbstraction took 106054.82 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 59.8 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -97.2 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 01:58:13,509 INFO L168 Benchmark]: Witness Printer took 31.31 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 11.5 GB. [2018-12-03 01:58:13,511 INFO L336 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 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 367.35 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 938.0 MB in the beginning and 1.1 GB in the end (delta: -171.6 MB). Peak memory consumption was 37.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 21.52 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.75 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 150.75 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 106054.82 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 59.8 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -97.2 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 31.31 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 1442]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 1438]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 1437]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 1437]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 1438]: free always succeeds For all program executions holds that free always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 5 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 5 error locations. SAFE Result, 106.0s OverallTime, 12 OverallIterations, 2 TraceHistogramMax, 86.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 322 SDtfs, 131 SDslu, 891 SDs, 0 SdLazy, 884 SolverSat, 118 SolverUnsat, 24 SolverUnknown, 0 SolverNotchecked, 47.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 576 GetRequests, 476 SyntacticMatches, 4 SemanticMatches, 96 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 56.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 12 MinimizatonAttempts, 67 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 18.9s InterpolantComputationTime, 383 NumberOfCodeBlocks, 383 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 546 ConstructedInterpolants, 33 QuantifiedInterpolants, 61871 SizeOfPredicates, 35 NumberOfNonLiveVariables, 1319 ConjunctsInSsa, 163 ConjunctsInUnsatCore, 25 InterpolantComputations, 7 PerfectInterpolantSequences, 56/92 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...