./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_c3296cc3-ae04-416b-809c-1704b39edb97/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_c3296cc3-ae04-416b-809c-1704b39edb97/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c3296cc3-ae04-416b-809c-1704b39edb97/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c3296cc3-ae04-416b-809c-1704b39edb97/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_c3296cc3-ae04-416b-809c-1704b39edb97/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c3296cc3-ae04-416b-809c-1704b39edb97/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e9f95b6c839057502038c8f9c89c369852ea0865 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 22:07:36,222 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 22:07:36,223 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 22:07:36,231 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 22:07:36,231 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 22:07:36,232 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 22:07:36,233 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 22:07:36,234 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 22:07:36,235 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 22:07:36,236 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 22:07:36,237 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 22:07:36,237 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 22:07:36,238 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 22:07:36,238 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 22:07:36,239 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 22:07:36,240 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 22:07:36,240 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 22:07:36,241 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 22:07:36,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 22:07:36,244 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 22:07:36,246 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 22:07:36,246 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 22:07:36,247 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 22:07:36,248 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 22:07:36,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 22:07:36,250 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 22:07:36,250 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 22:07:36,250 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 22:07:36,250 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 22:07:36,251 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 22:07:36,251 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 22:07:36,251 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 22:07:36,252 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 22:07:36,252 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 22:07:36,253 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 22:07:36,253 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 22:07:36,253 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 22:07:36,254 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 22:07:36,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 22:07:36,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 22:07:36,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 22:07:36,255 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c3296cc3-ae04-416b-809c-1704b39edb97/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2019-12-07 22:07:36,265 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 22:07:36,265 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 22:07:36,266 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 22:07:36,266 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 22:07:36,266 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 22:07:36,266 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 22:07:36,266 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 22:07:36,267 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 22:07:36,267 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 22:07:36,267 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 22:07:36,267 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 22:07:36,267 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 22:07:36,267 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 22:07:36,267 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 22:07:36,267 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 22:07:36,268 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 22:07:36,268 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 22:07:36,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 22:07:36,268 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 22:07:36,268 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 22:07:36,269 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 22:07:36,269 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 22:07:36,269 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 22:07:36,269 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-12-07 22:07:36,269 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-12-07 22:07:36,269 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-12-07 22:07:36,269 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 22:07:36,269 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 22:07:36,270 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 22:07:36,270 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 22:07:36,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 22:07:36,270 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 22:07:36,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 22:07:36,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 22:07:36,271 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 22:07:36,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 22:07:36,271 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 22:07:36,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 22:07:36,271 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 22:07:36,271 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 22:07:36,271 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c3296cc3-ae04-416b-809c-1704b39edb97/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e9f95b6c839057502038c8f9c89c369852ea0865 [2019-12-07 22:07:36,374 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 22:07:36,382 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 22:07:36,385 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 22:07:36,386 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 22:07:36,386 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 22:07:36,386 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c3296cc3-ae04-416b-809c-1704b39edb97/bin/utaipan/../../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i [2019-12-07 22:07:36,423 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c3296cc3-ae04-416b-809c-1704b39edb97/bin/utaipan/data/a70646c70/681184fbde3443279996ee2660300744/FLAG465f71d5c [2019-12-07 22:07:36,883 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 22:07:36,883 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c3296cc3-ae04-416b-809c-1704b39edb97/sv-benchmarks/c/list-ext-properties/960521-1_1-1.i [2019-12-07 22:07:36,893 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c3296cc3-ae04-416b-809c-1704b39edb97/bin/utaipan/data/a70646c70/681184fbde3443279996ee2660300744/FLAG465f71d5c [2019-12-07 22:07:37,409 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c3296cc3-ae04-416b-809c-1704b39edb97/bin/utaipan/data/a70646c70/681184fbde3443279996ee2660300744 [2019-12-07 22:07:37,413 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 22:07:37,414 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 22:07:37,416 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 22:07:37,416 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 22:07:37,420 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 22:07:37,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 10:07:37" (1/1) ... [2019-12-07 22:07:37,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@513e5c80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:37, skipping insertion in model container [2019-12-07 22:07:37,425 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 10:07:37" (1/1) ... [2019-12-07 22:07:37,432 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 22:07:37,457 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 22:07:37,661 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 22:07:37,667 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 22:07:37,694 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 22:07:37,725 INFO L208 MainTranslator]: Completed translation [2019-12-07 22:07:37,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:37 WrapperNode [2019-12-07 22:07:37,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 22:07:37,726 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 22:07:37,726 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 22:07:37,726 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 22:07:37,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:37" (1/1) ... [2019-12-07 22:07:37,741 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:37" (1/1) ... [2019-12-07 22:07:37,755 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 22:07:37,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 22:07:37,756 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 22:07:37,756 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 22:07:37,761 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:37" (1/1) ... [2019-12-07 22:07:37,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:37" (1/1) ... [2019-12-07 22:07:37,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:37" (1/1) ... [2019-12-07 22:07:37,764 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:37" (1/1) ... [2019-12-07 22:07:37,768 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:37" (1/1) ... [2019-12-07 22:07:37,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:37" (1/1) ... [2019-12-07 22:07:37,772 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:37" (1/1) ... [2019-12-07 22:07:37,773 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 22:07:37,774 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 22:07:37,774 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 22:07:37,774 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 22:07:37,774 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:37" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3296cc3-ae04-416b-809c-1704b39edb97/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 22:07:37,813 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 22:07:37,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 22:07:37,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 22:07:37,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 22:07:37,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 22:07:37,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 22:07:38,038 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 22:07:38,039 INFO L287 CfgBuilder]: Removed 9 assume(true) statements. [2019-12-07 22:07:38,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 10:07:38 BoogieIcfgContainer [2019-12-07 22:07:38,040 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 22:07:38,041 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 22:07:38,041 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 22:07:38,043 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 22:07:38,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 10:07:37" (1/3) ... [2019-12-07 22:07:38,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e3de352 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 10:07:38, skipping insertion in model container [2019-12-07 22:07:38,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:37" (2/3) ... [2019-12-07 22:07:38,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e3de352 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 10:07:38, skipping insertion in model container [2019-12-07 22:07:38,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 10:07:38" (3/3) ... [2019-12-07 22:07:38,045 INFO L109 eAbstractionObserver]: Analyzing ICFG 960521-1_1-1.i [2019-12-07 22:07:38,051 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 22:07:38,056 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 21 error locations. [2019-12-07 22:07:38,064 INFO L249 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2019-12-07 22:07:38,076 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 22:07:38,076 INFO L374 AbstractCegarLoop]: Hoare is false [2019-12-07 22:07:38,076 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 22:07:38,076 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 22:07:38,077 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 22:07:38,077 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 22:07:38,077 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 22:07:38,077 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 22:07:38,088 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2019-12-07 22:07:38,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-12-07 22:07:38,092 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 22:07:38,093 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-12-07 22:07:38,093 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2019-12-07 22:07:38,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 22:07:38,097 INFO L82 PathProgramCache]: Analyzing trace with hash 3678261, now seen corresponding path program 1 times [2019-12-07 22:07:38,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 22:07:38,103 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651095787] [2019-12-07 22:07:38,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 22:07:38,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 22:07:38,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 22:07:38,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651095787] [2019-12-07 22:07:38,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 22:07:38,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 22:07:38,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764238300] [2019-12-07 22:07:38,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 22:07:38,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 22:07:38,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 22:07:38,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 22:07:38,199 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 2 states. [2019-12-07 22:07:38,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 22:07:38,209 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2019-12-07 22:07:38,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 22:07:38,210 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2019-12-07 22:07:38,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 22:07:38,216 INFO L225 Difference]: With dead ends: 47 [2019-12-07 22:07:38,216 INFO L226 Difference]: Without dead ends: 46 [2019-12-07 22:07:38,217 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 22:07:38,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-12-07 22:07:38,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-12-07 22:07:38,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-12-07 22:07:38,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2019-12-07 22:07:38,240 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 4 [2019-12-07 22:07:38,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 22:07:38,240 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2019-12-07 22:07:38,240 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 22:07:38,241 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2019-12-07 22:07:38,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 22:07:38,241 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 22:07:38,241 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-07 22:07:38,241 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2019-12-07 22:07:38,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 22:07:38,241 INFO L82 PathProgramCache]: Analyzing trace with hash 113811744, now seen corresponding path program 1 times [2019-12-07 22:07:38,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 22:07:38,242 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754024672] [2019-12-07 22:07:38,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 22:07:38,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 22:07:38,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 22:07:38,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754024672] [2019-12-07 22:07:38,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 22:07:38,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 22:07:38,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731040508] [2019-12-07 22:07:38,280 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 22:07:38,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 22:07:38,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 22:07:38,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 22:07:38,280 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 3 states. [2019-12-07 22:07:38,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 22:07:38,313 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2019-12-07 22:07:38,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 22:07:38,313 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-07 22:07:38,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 22:07:38,314 INFO L225 Difference]: With dead ends: 45 [2019-12-07 22:07:38,314 INFO L226 Difference]: Without dead ends: 45 [2019-12-07 22:07:38,315 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 22:07:38,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-12-07 22:07:38,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-12-07 22:07:38,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-12-07 22:07:38,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2019-12-07 22:07:38,319 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 5 [2019-12-07 22:07:38,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 22:07:38,319 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2019-12-07 22:07:38,319 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 22:07:38,319 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2019-12-07 22:07:38,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 22:07:38,319 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 22:07:38,320 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-07 22:07:38,320 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2019-12-07 22:07:38,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 22:07:38,320 INFO L82 PathProgramCache]: Analyzing trace with hash 113811745, now seen corresponding path program 1 times [2019-12-07 22:07:38,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 22:07:38,320 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42923853] [2019-12-07 22:07:38,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 22:07:38,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 22:07:38,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 22:07:38,358 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42923853] [2019-12-07 22:07:38,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 22:07:38,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 22:07:38,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393916584] [2019-12-07 22:07:38,359 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 22:07:38,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 22:07:38,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 22:07:38,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 22:07:38,360 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 4 states. [2019-12-07 22:07:38,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 22:07:38,403 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2019-12-07 22:07:38,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 22:07:38,404 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-12-07 22:07:38,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 22:07:38,405 INFO L225 Difference]: With dead ends: 44 [2019-12-07 22:07:38,405 INFO L226 Difference]: Without dead ends: 44 [2019-12-07 22:07:38,405 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 22:07:38,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-12-07 22:07:38,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-12-07 22:07:38,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-12-07 22:07:38,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2019-12-07 22:07:38,409 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 5 [2019-12-07 22:07:38,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 22:07:38,409 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2019-12-07 22:07:38,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 22:07:38,409 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2019-12-07 22:07:38,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 22:07:38,409 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 22:07:38,409 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 22:07:38,410 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2019-12-07 22:07:38,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 22:07:38,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1998977518, now seen corresponding path program 1 times [2019-12-07 22:07:38,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 22:07:38,410 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003780667] [2019-12-07 22:07:38,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 22:07:38,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 22:07:38,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 22:07:38,445 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003780667] [2019-12-07 22:07:38,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 22:07:38,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 22:07:38,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43341962] [2019-12-07 22:07:38,446 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 22:07:38,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 22:07:38,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 22:07:38,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 22:07:38,446 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 4 states. [2019-12-07 22:07:38,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 22:07:38,472 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2019-12-07 22:07:38,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 22:07:38,472 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-07 22:07:38,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 22:07:38,472 INFO L225 Difference]: With dead ends: 41 [2019-12-07 22:07:38,473 INFO L226 Difference]: Without dead ends: 41 [2019-12-07 22:07:38,473 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 22:07:38,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-07 22:07:38,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-12-07 22:07:38,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-12-07 22:07:38,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2019-12-07 22:07:38,476 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 7 [2019-12-07 22:07:38,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 22:07:38,476 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2019-12-07 22:07:38,476 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 22:07:38,476 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2019-12-07 22:07:38,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 22:07:38,477 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 22:07:38,477 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 22:07:38,477 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2019-12-07 22:07:38,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 22:07:38,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1998977519, now seen corresponding path program 1 times [2019-12-07 22:07:38,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 22:07:38,478 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351657108] [2019-12-07 22:07:38,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 22:07:38,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 22:07:38,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 22:07:38,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351657108] [2019-12-07 22:07:38,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 22:07:38,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 22:07:38,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475456249] [2019-12-07 22:07:38,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 22:07:38,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 22:07:38,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 22:07:38,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-12-07 22:07:38,542 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 6 states. [2019-12-07 22:07:38,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 22:07:38,609 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2019-12-07 22:07:38,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 22:07:38,610 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2019-12-07 22:07:38,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 22:07:38,610 INFO L225 Difference]: With dead ends: 72 [2019-12-07 22:07:38,610 INFO L226 Difference]: Without dead ends: 72 [2019-12-07 22:07:38,611 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-12-07 22:07:38,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-12-07 22:07:38,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 41. [2019-12-07 22:07:38,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-12-07 22:07:38,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2019-12-07 22:07:38,615 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 7 [2019-12-07 22:07:38,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 22:07:38,615 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2019-12-07 22:07:38,615 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 22:07:38,615 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2019-12-07 22:07:38,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 22:07:38,616 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 22:07:38,616 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 22:07:38,616 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2019-12-07 22:07:38,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 22:07:38,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1167076850, now seen corresponding path program 1 times [2019-12-07 22:07:38,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 22:07:38,617 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622002187] [2019-12-07 22:07:38,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 22:07:38,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 22:07:38,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 22:07:38,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622002187] [2019-12-07 22:07:38,655 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820138069] [2019-12-07 22:07:38,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c3296cc3-ae04-416b-809c-1704b39edb97/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 22:07:38,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 22:07:38,688 INFO L264 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 22:07:38,691 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 22:07:38,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 22:07:38,719 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 22:07:38,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 22:07:38,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-12-07 22:07:38,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 8 [2019-12-07 22:07:38,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707537642] [2019-12-07 22:07:38,736 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 22:07:38,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 22:07:38,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 22:07:38,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-12-07 22:07:38,737 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 7 states. [2019-12-07 22:07:38,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 22:07:38,771 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2019-12-07 22:07:38,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 22:07:38,771 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-12-07 22:07:38,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 22:07:38,772 INFO L225 Difference]: With dead ends: 76 [2019-12-07 22:07:38,772 INFO L226 Difference]: Without dead ends: 76 [2019-12-07 22:07:38,773 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-12-07 22:07:38,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-12-07 22:07:38,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 49. [2019-12-07 22:07:38,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-12-07 22:07:38,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2019-12-07 22:07:38,777 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 9 [2019-12-07 22:07:38,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 22:07:38,778 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2019-12-07 22:07:38,778 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 22:07:38,778 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2019-12-07 22:07:38,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 22:07:38,778 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 22:07:38,778 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 22:07:38,979 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 22:07:38,980 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2019-12-07 22:07:38,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 22:07:38,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1819713415, now seen corresponding path program 1 times [2019-12-07 22:07:38,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 22:07:38,981 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227822813] [2019-12-07 22:07:38,981 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 22:07:38,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 22:07:39,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 22:07:39,031 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227822813] [2019-12-07 22:07:39,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 22:07:39,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 22:07:39,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888827666] [2019-12-07 22:07:39,033 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 22:07:39,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 22:07:39,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 22:07:39,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 22:07:39,034 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 4 states. [2019-12-07 22:07:39,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 22:07:39,092 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2019-12-07 22:07:39,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 22:07:39,093 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-12-07 22:07:39,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 22:07:39,094 INFO L225 Difference]: With dead ends: 47 [2019-12-07 22:07:39,094 INFO L226 Difference]: Without dead ends: 47 [2019-12-07 22:07:39,094 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 22:07:39,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-12-07 22:07:39,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-12-07 22:07:39,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-07 22:07:39,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2019-12-07 22:07:39,098 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 10 [2019-12-07 22:07:39,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 22:07:39,098 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2019-12-07 22:07:39,098 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 22:07:39,098 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2019-12-07 22:07:39,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 22:07:39,099 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 22:07:39,099 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 22:07:39,099 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2019-12-07 22:07:39,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 22:07:39,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1819713416, now seen corresponding path program 1 times [2019-12-07 22:07:39,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 22:07:39,100 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414768835] [2019-12-07 22:07:39,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 22:07:39,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 22:07:39,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 22:07:39,134 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-12-07 22:07:39,134 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 22:07:39,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 10:07:39 BoogieIcfgContainer [2019-12-07 22:07:39,152 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 22:07:39,152 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 22:07:39,152 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 22:07:39,152 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 22:07:39,153 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 10:07:38" (3/4) ... [2019-12-07 22:07:39,154 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 22:07:39,185 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c3296cc3-ae04-416b-809c-1704b39edb97/bin/utaipan/witness.graphml [2019-12-07 22:07:39,185 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 22:07:39,187 INFO L168 Benchmark]: Toolchain (without parser) took 1772.47 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 91.8 MB). Free memory was 939.3 MB in the beginning and 908.3 MB in the end (delta: 31.0 MB). Peak memory consumption was 122.8 MB. Max. memory is 11.5 GB. [2019-12-07 22:07:39,187 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 955.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 22:07:39,187 INFO L168 Benchmark]: CACSL2BoogieTranslator took 310.02 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 91.8 MB). Free memory was 934.0 MB in the beginning and 1.1 GB in the end (delta: -140.5 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. [2019-12-07 22:07:39,187 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.48 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 22:07:39,188 INFO L168 Benchmark]: Boogie Preprocessor took 18.03 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 22:07:39,188 INFO L168 Benchmark]: RCFGBuilder took 266.21 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 27.2 MB). Peak memory consumption was 27.2 MB. Max. memory is 11.5 GB. [2019-12-07 22:07:39,188 INFO L168 Benchmark]: TraceAbstraction took 1111.38 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 913.7 MB in the end (delta: 128.1 MB). Peak memory consumption was 128.1 MB. Max. memory is 11.5 GB. [2019-12-07 22:07:39,189 INFO L168 Benchmark]: Witness Printer took 32.74 ms. Allocated memory is still 1.1 GB. Free memory was 913.7 MB in the beginning and 908.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 22:07:39,190 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 955.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 310.02 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 91.8 MB). Free memory was 934.0 MB in the beginning and 1.1 GB in the end (delta: -140.5 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 29.48 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.03 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 266.21 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 27.2 MB). Peak memory consumption was 27.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1111.38 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 913.7 MB in the end (delta: 128.1 MB). Peak memory consumption was 128.1 MB. Max. memory is 11.5 GB. * Witness Printer took 32.74 ms. Allocated memory is still 1.1 GB. Free memory was 913.7 MB in the beginning and 908.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 533]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L512] int *a, *b; [L513] int n; [L525] n = 1 VAL [a={0:0}, b={0:0}, n=1] [L526] COND FALSE !(__VERIFIER_nondet_int() && n < 30) [L529] a = malloc(n * sizeof(*a)) [L530] b = malloc(n * sizeof(*b)) [L531] EXPR b++ VAL [a={-1:0}, b={-2:4}, n=1] [L531] *b++ = 0 [L517] int i; [L518] i = 0 VAL [a={-1:0}, b={-2:4}, n=1] [L518] COND TRUE i < n VAL [a={-1:0}, b={-2:4}, n=1] [L519] a[i] = n [L518] i++ VAL [a={-1:0}, b={-2:4}, n=1] [L518] COND FALSE !(i < n) [L520] i = 0 VAL [a={-1:0}, b={-2:4}, n=1] [L520] COND FALSE !(i < n - 1) VAL [a={-1:0}, b={-2:4}, n=1] [L533] b[-2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 47 locations, 21 error locations. Result: UNSAFE, OverallTime: 1.0s, OverallIterations: 8, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 251 SDtfs, 385 SDslu, 228 SDs, 0 SdLazy, 202 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 58 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 66 NumberOfCodeBlocks, 66 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 56 ConstructedInterpolants, 0 QuantifiedInterpolants, 1704 SizeOfPredicates, 2 NumberOfNonLiveVariables, 65 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 9 InterpolantComputations, 8 PerfectInterpolantSequences, 6/7 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...