./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_circular_traversal-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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_41b3aa71-e317-48fc-9aff-d7c6f495040d/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_circular_traversal-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 15c2a0dbf98e8d278e41c47d311b6d4dc752a8f7 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_circular_traversal-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 15c2a0dbf98e8d278e41c47d311b6d4dc752a8f7 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 21:53:21,215 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 21:53:21,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 21:53:21,225 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 21:53:21,225 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 21:53:21,226 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 21:53:21,226 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 21:53:21,228 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 21:53:21,230 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 21:53:21,230 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 21:53:21,231 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 21:53:21,232 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 21:53:21,232 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 21:53:21,233 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 21:53:21,233 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 21:53:21,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 21:53:21,235 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 21:53:21,236 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 21:53:21,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 21:53:21,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 21:53:21,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 21:53:21,240 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 21:53:21,241 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 21:53:21,241 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 21:53:21,243 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 21:53:21,243 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 21:53:21,243 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 21:53:21,244 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 21:53:21,244 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 21:53:21,245 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 21:53:21,245 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 21:53:21,246 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 21:53:21,246 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 21:53:21,247 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 21:53:21,248 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 21:53:21,248 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 21:53:21,248 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 21:53:21,248 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 21:53:21,249 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 21:53:21,249 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 21:53:21,250 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 21:53:21,251 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-12-07 21:53:21,264 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 21:53:21,264 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 21:53:21,265 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 21:53:21,265 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 21:53:21,265 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 21:53:21,265 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 21:53:21,266 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 21:53:21,266 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 21:53:21,266 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 21:53:21,266 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 21:53:21,266 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 21:53:21,266 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 21:53:21,267 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 21:53:21,267 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 21:53:21,267 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 21:53:21,267 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 21:53:21,267 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 21:53:21,268 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 21:53:21,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 21:53:21,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 21:53:21,268 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 21:53:21,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 21:53:21,268 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 21:53:21,268 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 21:53:21,268 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 21:53:21,268 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 21:53:21,269 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 21:53:21,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 21:53:21,269 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 21:53:21,269 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 21:53:21,269 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 21:53:21,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 21:53:21,269 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 21:53:21,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 21:53:21,269 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 21:53:21,270 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 21:53:21,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 21:53:21,270 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 21:53:21,270 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 21:53:21,270 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 21:53:21,270 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_41b3aa71-e317-48fc-9aff-d7c6f495040d/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 ! call(__VERIFIER_error())) ) 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 -> 15c2a0dbf98e8d278e41c47d311b6d4dc752a8f7 [2019-12-07 21:53:21,368 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 21:53:21,376 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 21:53:21,379 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 21:53:21,379 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 21:53:21,380 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 21:53:21,380 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/bin/utaipan/../../sv-benchmarks/c/list-ext3-properties/sll_circular_traversal-1.i [2019-12-07 21:53:21,419 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/bin/utaipan/data/75a9063f0/8af5fad77bbd42369bcac60e0841e2e3/FLAG3820c8ed2 [2019-12-07 21:53:21,786 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 21:53:21,786 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/sv-benchmarks/c/list-ext3-properties/sll_circular_traversal-1.i [2019-12-07 21:53:21,795 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/bin/utaipan/data/75a9063f0/8af5fad77bbd42369bcac60e0841e2e3/FLAG3820c8ed2 [2019-12-07 21:53:21,804 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/bin/utaipan/data/75a9063f0/8af5fad77bbd42369bcac60e0841e2e3 [2019-12-07 21:53:21,805 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 21:53:21,806 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 21:53:21,807 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 21:53:21,807 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 21:53:21,810 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 21:53:21,811 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 09:53:21" (1/1) ... [2019-12-07 21:53:21,813 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51100d54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:21, skipping insertion in model container [2019-12-07 21:53:21,814 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 09:53:21" (1/1) ... [2019-12-07 21:53:21,820 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 21:53:21,853 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 21:53:22,065 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 21:53:22,073 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 21:53:22,100 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 21:53:22,130 INFO L208 MainTranslator]: Completed translation [2019-12-07 21:53:22,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:22 WrapperNode [2019-12-07 21:53:22,131 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 21:53:22,131 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 21:53:22,131 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 21:53:22,131 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 21:53:22,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:22" (1/1) ... [2019-12-07 21:53:22,146 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:22" (1/1) ... [2019-12-07 21:53:22,161 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 21:53:22,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 21:53:22,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 21:53:22,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 21:53:22,167 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:22" (1/1) ... [2019-12-07 21:53:22,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:22" (1/1) ... [2019-12-07 21:53:22,169 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:22" (1/1) ... [2019-12-07 21:53:22,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:22" (1/1) ... [2019-12-07 21:53:22,174 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:22" (1/1) ... [2019-12-07 21:53:22,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:22" (1/1) ... [2019-12-07 21:53:22,178 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:22" (1/1) ... [2019-12-07 21:53:22,180 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 21:53:22,180 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 21:53:22,181 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 21:53:22,181 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 21:53:22,181 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/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 21:53:22,219 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 21:53:22,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 21:53:22,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 21:53:22,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-12-07 21:53:22,220 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-12-07 21:53:22,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 21:53:22,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 21:53:22,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 21:53:22,437 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 21:53:22,437 INFO L287 CfgBuilder]: Removed 13 assume(true) statements. [2019-12-07 21:53:22,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 09:53:22 BoogieIcfgContainer [2019-12-07 21:53:22,438 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 21:53:22,439 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 21:53:22,439 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 21:53:22,440 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 21:53:22,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 09:53:21" (1/3) ... [2019-12-07 21:53:22,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8e0559b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 09:53:22, skipping insertion in model container [2019-12-07 21:53:22,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:22" (2/3) ... [2019-12-07 21:53:22,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8e0559b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 09:53:22, skipping insertion in model container [2019-12-07 21:53:22,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 09:53:22" (3/3) ... [2019-12-07 21:53:22,443 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_circular_traversal-1.i [2019-12-07 21:53:22,449 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 21:53:22,453 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 21:53:22,460 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 21:53:22,474 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 21:53:22,474 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 21:53:22,474 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 21:53:22,474 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 21:53:22,474 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 21:53:22,474 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 21:53:22,474 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 21:53:22,475 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 21:53:22,485 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-12-07 21:53:22,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-12-07 21:53:22,488 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:53:22,489 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-12-07 21:53:22,489 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:53:22,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:53:22,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1039727438, now seen corresponding path program 1 times [2019-12-07 21:53:22,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:53:22,498 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931024006] [2019-12-07 21:53:22,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:53:22,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:53:22,611 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 21:53:22,611 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931024006] [2019-12-07 21:53:22,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 21:53:22,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 21:53:22,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949554195] [2019-12-07 21:53:22,615 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 21:53:22,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:53:22,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 21:53:22,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 21:53:22,625 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2019-12-07 21:53:22,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:53:22,649 INFO L93 Difference]: Finished difference Result 33 states and 48 transitions. [2019-12-07 21:53:22,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 21:53:22,651 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-12-07 21:53:22,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:53:22,659 INFO L225 Difference]: With dead ends: 33 [2019-12-07 21:53:22,659 INFO L226 Difference]: Without dead ends: 15 [2019-12-07 21:53:22,661 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 21:53:22,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-12-07 21:53:22,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-12-07 21:53:22,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-12-07 21:53:22,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2019-12-07 21:53:22,688 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 6 [2019-12-07 21:53:22,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:53:22,688 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2019-12-07 21:53:22,688 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 21:53:22,688 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2019-12-07 21:53:22,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 21:53:22,689 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:53:22,689 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 21:53:22,689 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:53:22,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:53:22,689 INFO L82 PathProgramCache]: Analyzing trace with hash -325945519, now seen corresponding path program 1 times [2019-12-07 21:53:22,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:53:22,689 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971887725] [2019-12-07 21:53:22,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:53:22,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:53:22,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:53:22,734 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971887725] [2019-12-07 21:53:22,734 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542357118] [2019-12-07 21:53:22,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/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 21:53:22,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:53:22,779 INFO L264 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 21:53:22,783 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:53:22,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:53:22,803 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:53:22,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:53:22,816 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2105437258] [2019-12-07 21:53:22,833 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2019-12-07 21:53:22,833 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 21:53:22,838 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 21:53:22,842 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 21:53:22,842 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 21:53:22,961 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 21:53:23,110 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 21:53:23,509 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 21:53:23,735 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 21:53:24,159 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 21:53:24,252 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 21:53:24,366 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 21:53:24,376 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 21:53:24,397 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 21:53:24,445 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 21:53:24,814 WARN L192 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 95 [2019-12-07 21:53:25,070 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 77 [2019-12-07 21:53:25,238 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 82 [2019-12-07 21:53:25,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-12-07 21:53:25,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 3, 3] total 11 [2019-12-07 21:53:25,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938746812] [2019-12-07 21:53:25,241 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 21:53:25,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:53:25,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 21:53:25,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-12-07 21:53:25,242 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 7 states. [2019-12-07 21:53:25,399 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 63 [2019-12-07 21:53:25,582 WARN L192 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 70 [2019-12-07 21:53:25,793 WARN L192 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 86 [2019-12-07 21:53:25,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:53:25,869 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2019-12-07 21:53:25,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 21:53:25,870 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2019-12-07 21:53:25,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:53:25,871 INFO L225 Difference]: With dead ends: 27 [2019-12-07 21:53:25,871 INFO L226 Difference]: Without dead ends: 25 [2019-12-07 21:53:25,872 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2019-12-07 21:53:25,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-12-07 21:53:25,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 16. [2019-12-07 21:53:25,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-12-07 21:53:25,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2019-12-07 21:53:25,875 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 8 [2019-12-07 21:53:25,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:53:25,875 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2019-12-07 21:53:25,875 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 21:53:25,876 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2019-12-07 21:53:25,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 21:53:25,876 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:53:25,876 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 21:53:26,077 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:53:26,077 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:53:26,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:53:26,078 INFO L82 PathProgramCache]: Analyzing trace with hash 679238864, now seen corresponding path program 1 times [2019-12-07 21:53:26,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:53:26,078 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953912438] [2019-12-07 21:53:26,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:53:26,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:53:26,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 21:53:26,115 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953912438] [2019-12-07 21:53:26,115 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176655855] [2019-12-07 21:53:26,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:53:26,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:53:26,148 INFO L264 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 21:53:26,148 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:53:26,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 21:53:26,153 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:53:26,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 21:53:26,161 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1757613471] [2019-12-07 21:53:26,162 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-12-07 21:53:26,162 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 21:53:26,162 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 21:53:26,162 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 21:53:26,163 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 21:53:26,198 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 21:53:26,273 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 21:53:26,436 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 21:53:26,690 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 21:53:27,064 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 21:53:27,142 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 21:53:27,229 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 21:53:27,236 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 21:53:27,243 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 21:53:27,512 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 21:53:27,930 WARN L192 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 95 [2019-12-07 21:53:28,034 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 21:53:28,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 21:53:28,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2019-12-07 21:53:28,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282443340] [2019-12-07 21:53:28,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 21:53:28,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:53:28,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 21:53:28,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-12-07 21:53:28,036 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 7 states. [2019-12-07 21:53:28,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:53:28,061 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2019-12-07 21:53:28,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 21:53:28,062 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-07 21:53:28,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:53:28,062 INFO L225 Difference]: With dead ends: 33 [2019-12-07 21:53:28,062 INFO L226 Difference]: Without dead ends: 22 [2019-12-07 21:53:28,063 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-12-07 21:53:28,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-12-07 21:53:28,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-12-07 21:53:28,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-07 21:53:28,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-12-07 21:53:28,069 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 11 [2019-12-07 21:53:28,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:53:28,069 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-12-07 21:53:28,069 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 21:53:28,069 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-12-07 21:53:28,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-07 21:53:28,070 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:53:28,070 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 21:53:28,270 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:53:28,271 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:53:28,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:53:28,272 INFO L82 PathProgramCache]: Analyzing trace with hash 576189011, now seen corresponding path program 2 times [2019-12-07 21:53:28,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:53:28,272 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191176680] [2019-12-07 21:53:28,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:53:28,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:53:28,646 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 21:53:28,646 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191176680] [2019-12-07 21:53:28,646 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185778826] [2019-12-07 21:53:28,646 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:53:28,747 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-07 21:53:28,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 21:53:28,748 INFO L264 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 59 conjunts are in the unsatisfiable core [2019-12-07 21:53:28,750 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:53:29,208 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@3ce69340 [2019-12-07 21:53:29,209 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [121219969] [2019-12-07 21:53:29,210 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-12-07 21:53:29,210 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 21:53:29,210 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 21:53:29,210 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 21:53:29,211 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 21:53:29,216 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@3ce69340 at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.managedscript.ManagedScript.lock(ManagedScript.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker.assertLhs(IncrementalPlicationChecker.java:74) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker.checkPlication(IncrementalPlicationChecker.java:106) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ArrayIndexEqualityManager.(ArrayIndexEqualityManager.java:91) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:555) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:428) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:234) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:146) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:279) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:139) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:332) 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:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-12-07 21:53:29,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 21:53:29,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-12-07 21:53:29,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427155977] [2019-12-07 21:53:29,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-07 21:53:29,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:53:29,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-07 21:53:29,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2019-12-07 21:53:29,219 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 11 states. [2019-12-07 21:53:29,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 21:53:29,420 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:53:29,420 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@3ce69340 at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.managedscript.ManagedScript.lock(ManagedScript.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:354) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:202) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:127) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:60) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:62) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:359) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1066) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:968) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:188) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:698) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:627) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:454) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:139) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:332) 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:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-12-07 21:53:29,424 INFO L168 Benchmark]: Toolchain (without parser) took 7617.45 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 399.0 MB). Free memory was 934.4 MB in the beginning and 1.1 GB in the end (delta: -126.7 MB). Peak memory consumption was 272.3 MB. Max. memory is 11.5 GB. [2019-12-07 21:53:29,425 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 955.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 21:53:29,425 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.61 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 156.8 MB). Free memory was 934.4 MB in the beginning and 1.1 GB in the end (delta: -196.4 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. [2019-12-07 21:53:29,426 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.03 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 21:53:29,426 INFO L168 Benchmark]: Boogie Preprocessor took 19.11 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 21:53:29,427 INFO L168 Benchmark]: RCFGBuilder took 257.52 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: 36.0 MB). Peak memory consumption was 36.0 MB. Max. memory is 11.5 GB. [2019-12-07 21:53:29,428 INFO L168 Benchmark]: TraceAbstraction took 6984.07 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 242.2 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 33.7 MB). Peak memory consumption was 275.9 MB. Max. memory is 11.5 GB. [2019-12-07 21:53:29,430 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 955.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 323.61 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 156.8 MB). Free memory was 934.4 MB in the beginning and 1.1 GB in the end (delta: -196.4 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 30.03 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 19.11 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 257.52 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: 36.0 MB). Peak memory consumption was 36.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6984.07 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 242.2 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 33.7 MB). Peak memory consumption was 275.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@3ce69340 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@3ce69340: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.managedscript.ManagedScript.lock(ManagedScript.java:83) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.25-f470102 [2019-12-07 21:53:30,787 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 21:53:30,788 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 21:53:30,796 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 21:53:30,796 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 21:53:30,797 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 21:53:30,798 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 21:53:30,799 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 21:53:30,801 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 21:53:30,801 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 21:53:30,802 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 21:53:30,803 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 21:53:30,803 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 21:53:30,804 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 21:53:30,804 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 21:53:30,805 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 21:53:30,806 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 21:53:30,806 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 21:53:30,808 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 21:53:30,809 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 21:53:30,811 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 21:53:30,811 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 21:53:30,812 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 21:53:30,813 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 21:53:30,815 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 21:53:30,815 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 21:53:30,815 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 21:53:30,816 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 21:53:30,816 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 21:53:30,817 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 21:53:30,817 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 21:53:30,817 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 21:53:30,818 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 21:53:30,818 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 21:53:30,819 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 21:53:30,819 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 21:53:30,819 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 21:53:30,820 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 21:53:30,820 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 21:53:30,820 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 21:53:30,821 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 21:53:30,821 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-12-07 21:53:30,832 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 21:53:30,832 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 21:53:30,832 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 21:53:30,832 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 21:53:30,833 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 21:53:30,833 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 21:53:30,833 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 21:53:30,833 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 21:53:30,833 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 21:53:30,834 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 21:53:30,834 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 21:53:30,834 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 21:53:30,834 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 21:53:30,834 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 21:53:30,834 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 21:53:30,834 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 21:53:30,835 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 21:53:30,835 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-12-07 21:53:30,835 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-12-07 21:53:30,835 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 21:53:30,835 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 21:53:30,835 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 21:53:30,835 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 21:53:30,836 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 21:53:30,836 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 21:53:30,836 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 21:53:30,836 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 21:53:30,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 21:53:30,836 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 21:53:30,836 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 21:53:30,836 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 21:53:30,837 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-12-07 21:53:30,837 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-12-07 21:53:30,837 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 21:53:30,837 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 21:53:30,837 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 21:53:30,837 INFO L138 SettingsManager]: * Logic for external solver=AUFBV Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/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 ! call(__VERIFIER_error())) ) 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 -> 15c2a0dbf98e8d278e41c47d311b6d4dc752a8f7 [2019-12-07 21:53:31,011 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 21:53:31,021 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 21:53:31,024 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 21:53:31,025 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 21:53:31,025 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 21:53:31,026 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/bin/utaipan/../../sv-benchmarks/c/list-ext3-properties/sll_circular_traversal-1.i [2019-12-07 21:53:31,072 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/bin/utaipan/data/f69df2495/b3c3f7cef57142b8a81d152721897fbd/FLAG8b8279fe3 [2019-12-07 21:53:31,495 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 21:53:31,495 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/sv-benchmarks/c/list-ext3-properties/sll_circular_traversal-1.i [2019-12-07 21:53:31,504 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/bin/utaipan/data/f69df2495/b3c3f7cef57142b8a81d152721897fbd/FLAG8b8279fe3 [2019-12-07 21:53:31,844 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/bin/utaipan/data/f69df2495/b3c3f7cef57142b8a81d152721897fbd [2019-12-07 21:53:31,847 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 21:53:31,849 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 21:53:31,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 21:53:31,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 21:53:31,854 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 21:53:31,855 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 09:53:31" (1/1) ... [2019-12-07 21:53:31,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21518952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:31, skipping insertion in model container [2019-12-07 21:53:31,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 09:53:31" (1/1) ... [2019-12-07 21:53:31,867 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 21:53:31,898 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 21:53:32,104 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 21:53:32,112 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 21:53:32,141 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 21:53:32,175 INFO L208 MainTranslator]: Completed translation [2019-12-07 21:53:32,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:32 WrapperNode [2019-12-07 21:53:32,175 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 21:53:32,175 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 21:53:32,176 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 21:53:32,176 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 21:53:32,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:32" (1/1) ... [2019-12-07 21:53:32,193 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:32" (1/1) ... [2019-12-07 21:53:32,207 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 21:53:32,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 21:53:32,207 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 21:53:32,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 21:53:32,213 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:32" (1/1) ... [2019-12-07 21:53:32,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:32" (1/1) ... [2019-12-07 21:53:32,215 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:32" (1/1) ... [2019-12-07 21:53:32,216 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:32" (1/1) ... [2019-12-07 21:53:32,222 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:32" (1/1) ... [2019-12-07 21:53:32,226 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:32" (1/1) ... [2019-12-07 21:53:32,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:32" (1/1) ... [2019-12-07 21:53:32,230 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 21:53:32,230 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 21:53:32,230 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 21:53:32,230 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 21:53:32,231 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:32" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/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 21:53:32,269 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-12-07 21:53:32,269 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 21:53:32,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-12-07 21:53:32,270 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-12-07 21:53:32,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 21:53:32,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-12-07 21:53:32,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 21:53:32,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 21:53:32,488 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 21:53:32,488 INFO L287 CfgBuilder]: Removed 13 assume(true) statements. [2019-12-07 21:53:32,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 09:53:32 BoogieIcfgContainer [2019-12-07 21:53:32,489 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 21:53:32,490 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 21:53:32,490 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 21:53:32,492 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 21:53:32,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 09:53:31" (1/3) ... [2019-12-07 21:53:32,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d3f92e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 09:53:32, skipping insertion in model container [2019-12-07 21:53:32,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:53:32" (2/3) ... [2019-12-07 21:53:32,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d3f92e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 09:53:32, skipping insertion in model container [2019-12-07 21:53:32,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 09:53:32" (3/3) ... [2019-12-07 21:53:32,494 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_circular_traversal-1.i [2019-12-07 21:53:32,500 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 21:53:32,506 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 21:53:32,515 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 21:53:32,531 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 21:53:32,531 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 21:53:32,531 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 21:53:32,531 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 21:53:32,531 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 21:53:32,531 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 21:53:32,531 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 21:53:32,532 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 21:53:32,540 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-12-07 21:53:32,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 21:53:32,544 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:53:32,545 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 21:53:32,545 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:53:32,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:53:32,548 INFO L82 PathProgramCache]: Analyzing trace with hash 742134712, now seen corresponding path program 1 times [2019-12-07 21:53:32,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 21:53:32,556 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [435709484] [2019-12-07 21:53:32,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2019-12-07 21:53:32,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:53:32,626 INFO L264 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 21:53:32,630 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:53:32,658 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 21:53:32,658 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:53:32,670 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 21:53:32,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [435709484] [2019-12-07 21:53:32,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 21:53:32,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-12-07 21:53:32,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571031845] [2019-12-07 21:53:32,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 21:53:32,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 21:53:32,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 21:53:32,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 21:53:32,685 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 4 states. [2019-12-07 21:53:32,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:53:32,745 INFO L93 Difference]: Finished difference Result 44 states and 63 transitions. [2019-12-07 21:53:32,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 21:53:32,746 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-12-07 21:53:32,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:53:32,752 INFO L225 Difference]: With dead ends: 44 [2019-12-07 21:53:32,752 INFO L226 Difference]: Without dead ends: 22 [2019-12-07 21:53:32,754 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 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 21:53:32,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-12-07 21:53:32,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-12-07 21:53:32,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-07 21:53:32,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-12-07 21:53:32,777 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 10 [2019-12-07 21:53:32,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:53:32,777 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-12-07 21:53:32,777 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 21:53:32,777 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-12-07 21:53:32,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 21:53:32,778 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:53:32,778 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 21:53:32,979 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2019-12-07 21:53:32,979 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:53:32,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:53:32,980 INFO L82 PathProgramCache]: Analyzing trace with hash 500274136, now seen corresponding path program 1 times [2019-12-07 21:53:32,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 21:53:32,981 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989574960] [2019-12-07 21:53:32,981 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2019-12-07 21:53:33,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:53:33,091 INFO L264 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 21:53:33,092 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:53:33,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:53:33,108 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:53:33,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:53:33,149 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989574960] [2019-12-07 21:53:33,149 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1364199860] [2019-12-07 21:53:33,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/bin/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 21:53:33,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:53:33,235 INFO L264 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 21:53:33,236 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:53:33,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:53:33,249 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:53:33,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:53:33,254 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953119464] [2019-12-07 21:53:33,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:53:33,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:53:33,327 INFO L264 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 21:53:33,328 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:53:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:53:33,342 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:53:33,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:53:33,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2019-12-07 21:53:33,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 6] total 10 [2019-12-07 21:53:33,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356330031] [2019-12-07 21:53:33,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 21:53:33,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 21:53:33,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 21:53:33,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-07 21:53:33,408 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 10 states. [2019-12-07 21:53:33,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:53:33,660 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2019-12-07 21:53:33,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 21:53:33,661 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-12-07 21:53:33,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:53:33,661 INFO L225 Difference]: With dead ends: 45 [2019-12-07 21:53:33,661 INFO L226 Difference]: Without dead ends: 34 [2019-12-07 21:53:33,662 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 78 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-12-07 21:53:33,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-12-07 21:53:33,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-12-07 21:53:33,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-07 21:53:33,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-12-07 21:53:33,667 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 16 [2019-12-07 21:53:33,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:53:33,667 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-12-07 21:53:33,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 21:53:33,667 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-12-07 21:53:33,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-07 21:53:33,668 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:53:33,668 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 21:53:34,269 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk,3 mathsat -unsat_core_generation=3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:53:34,270 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:53:34,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:53:34,271 INFO L82 PathProgramCache]: Analyzing trace with hash -2045871112, now seen corresponding path program 2 times [2019-12-07 21:53:34,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 21:53:34,273 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [760201481] [2019-12-07 21:53:34,273 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/bin/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2019-12-07 21:53:34,413 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 21:53:34,413 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 21:53:34,423 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-07 21:53:34,425 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:53:34,473 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2019-12-07 21:53:34,473 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:53:34,485 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:34,486 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 21:53:34,486 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2019-12-07 21:53:34,512 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 21:53:34,512 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 25 treesize of output 13 [2019-12-07 21:53:34,513 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:53:34,520 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:34,520 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 21:53:34,521 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:16 [2019-12-07 21:53:34,563 INFO L377 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 15 treesize of output 7 [2019-12-07 21:53:34,563 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:53:34,568 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:34,569 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 21:53:34,569 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:7 [2019-12-07 21:53:34,587 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-12-07 21:53:34,587 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:53:34,660 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 21:53:34,664 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:34,665 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-12-07 21:53:34,665 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:17 [2019-12-07 21:53:34,709 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:53:34,733 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:34,734 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 21:53:34,735 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 21:53:34,737 INFO L534 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2019-12-07 21:53:34,737 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:26 [2019-12-07 21:53:34,809 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-12-07 21:53:34,810 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [760201481] [2019-12-07 21:53:34,810 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [307866363] [2019-12-07 21:53:34,810 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/bin/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 [2019-12-07 21:53:34,927 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 21:53:34,927 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 21:53:34,929 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-07 21:53:34,931 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:53:34,938 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2019-12-07 21:53:34,939 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:53:34,947 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:34,947 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 21:53:34,947 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2019-12-07 21:53:34,953 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 21:53:34,954 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 25 treesize of output 13 [2019-12-07 21:53:34,954 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:53:34,960 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:34,961 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 21:53:34,961 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:16 [2019-12-07 21:53:34,966 INFO L377 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 15 treesize of output 7 [2019-12-07 21:53:34,967 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:53:34,970 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:34,970 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 21:53:34,971 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:7 [2019-12-07 21:53:34,972 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-12-07 21:53:34,973 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:53:34,977 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 21:53:34,981 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:34,982 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 21:53:34,982 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2019-12-07 21:53:35,037 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:53:35,059 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:35,060 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 21:53:35,060 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 21:53:35,061 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2019-12-07 21:53:35,061 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:26 [2019-12-07 21:53:35,065 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-12-07 21:53:35,065 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973421887] [2019-12-07 21:53:35,065 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:53:35,137 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 21:53:35,138 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 21:53:35,140 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-07 21:53:35,142 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:53:35,195 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2019-12-07 21:53:35,195 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:53:35,203 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:35,203 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 21:53:35,203 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2019-12-07 21:53:35,237 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 21:53:35,238 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 25 treesize of output 13 [2019-12-07 21:53:35,238 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:53:35,244 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:35,245 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 21:53:35,245 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:13 [2019-12-07 21:53:35,307 INFO L377 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 15 treesize of output 7 [2019-12-07 21:53:35,307 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:53:35,309 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:35,309 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 21:53:35,309 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-12-07 21:53:35,311 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-12-07 21:53:35,311 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:53:35,315 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 21:53:35,319 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:35,320 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-12-07 21:53:35,320 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:17 [2019-12-07 21:53:35,364 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:53:35,394 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:35,394 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 21:53:35,395 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 21:53:35,395 INFO L534 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2019-12-07 21:53:35,395 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:26 [2019-12-07 21:53:35,400 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-12-07 21:53:35,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2019-12-07 21:53:35,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2019-12-07 21:53:35,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22325958] [2019-12-07 21:53:35,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-07 21:53:35,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-12-07 21:53:35,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-07 21:53:35,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2019-12-07 21:53:35,402 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 20 states. [2019-12-07 21:53:35,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:53:35,745 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2019-12-07 21:53:35,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 21:53:35,746 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 22 [2019-12-07 21:53:35,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:53:35,746 INFO L225 Difference]: With dead ends: 38 [2019-12-07 21:53:35,746 INFO L226 Difference]: Without dead ends: 36 [2019-12-07 21:53:35,747 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2019-12-07 21:53:35,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-07 21:53:35,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-07 21:53:35,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-07 21:53:35,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-12-07 21:53:35,752 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 22 [2019-12-07 21:53:35,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:53:35,752 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-12-07 21:53:35,752 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-07 21:53:35,752 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-12-07 21:53:35,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-12-07 21:53:35,753 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:53:35,753 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 21:53:36,353 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 mathsat -unsat_core_generation=3,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:53:36,354 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 21:53:36,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:53:36,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1335739081, now seen corresponding path program 1 times [2019-12-07 21:53:36,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-12-07 21:53:36,356 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2043615114] [2019-12-07 21:53:36,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/bin/utaipan/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2019-12-07 21:53:36,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:53:36,575 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 44 conjunts are in the unsatisfiable core [2019-12-07 21:53:36,577 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:53:36,581 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-12-07 21:53:36,581 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:53:36,587 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:36,587 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 21:53:36,587 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 21:53:36,613 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:36,613 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 41 [2019-12-07 21:53:36,614 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:53:36,636 INFO L614 ElimStorePlain]: treesize reduction 14, result has 60.0 percent of original size [2019-12-07 21:53:36,636 INFO L534 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. [2019-12-07 21:53:36,636 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2019-12-07 21:53:36,687 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:36,688 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 71 [2019-12-07 21:53:36,689 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:53:36,735 INFO L614 ElimStorePlain]: treesize reduction 28, result has 54.8 percent of original size [2019-12-07 21:53:36,736 INFO L534 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. [2019-12-07 21:53:36,736 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:34 [2019-12-07 21:53:36,817 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:36,817 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 103 [2019-12-07 21:53:36,818 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:53:36,905 INFO L614 ElimStorePlain]: treesize reduction 42, result has 56.3 percent of original size [2019-12-07 21:53:36,906 INFO L534 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. [2019-12-07 21:53:36,906 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:54 [2019-12-07 21:53:36,953 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-12-07 21:53:36,953 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:53:36,992 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:36,993 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-12-07 21:53:36,993 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:73, output treesize:69 [2019-12-07 21:53:37,074 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:37,074 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 54 [2019-12-07 21:53:37,075 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:53:37,122 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:37,123 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 21:53:37,123 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:77, output treesize:34 [2019-12-07 21:53:37,160 INFO L430 ElimStorePlain]: Different costs {0=[|v_#memory_$Pointer$.base_44|, |v_#memory_$Pointer$.offset_44|], 2=[|v_#memory_int_54|, |v_#memory_int_55|]} [2019-12-07 21:53:37,173 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 21:53:37,174 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2019-12-07 21:53:37,174 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:53:37,267 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:37,278 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 21:53:37,278 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2019-12-07 21:53:37,279 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 21:53:37,338 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:37,342 INFO L534 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 21:53:37,382 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:37,389 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 21:53:37,390 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-12-07 21:53:37,390 INFO L534 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-12-07 21:53:37,426 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:37,426 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 21:53:37,427 INFO L239 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:98, output treesize:54 [2019-12-07 21:53:37,474 INFO L430 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.offset_45|, |v_#memory_$Pointer$.base_45|], 4=[|v_#memory_int_56|]} [2019-12-07 21:53:37,481 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2019-12-07 21:53:37,482 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 21:53:37,528 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:37,533 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 39 treesize of output 30 [2019-12-07 21:53:37,534 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 21:53:37,597 INFO L614 ElimStorePlain]: treesize reduction 4, result has 95.0 percent of original size [2019-12-07 21:53:37,609 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 21:53:37,610 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 27 [2019-12-07 21:53:37,610 INFO L534 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-12-07 21:53:37,630 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:37,631 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 21:53:37,631 INFO L239 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:88, output treesize:61 [2019-12-07 21:53:37,729 INFO L430 ElimStorePlain]: Different costs {0=[|#memory_$Pointer$.base|, |#memory_$Pointer$.offset|], 1=[|v_#memory_$Pointer$.offset_46|, |v_#memory_$Pointer$.base_46|], 3=[|v_#memory_int_57|]} [2019-12-07 21:53:37,735 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 21:53:37,790 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:37,796 INFO L534 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 21:53:37,826 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:37,838 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 21:53:37,839 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2019-12-07 21:53:37,856 INFO L377 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-12-07 21:53:37,856 INFO L534 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-12-07 21:53:37,858 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:37,858 INFO L534 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 21:53:37,879 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:37,885 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 21:53:37,885 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 69 [2019-12-07 21:53:37,885 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 21:53:37,887 INFO L430 ElimStorePlain]: Different costs {0=[v_arrayElimCell_29], 1=[v_arrayElimCell_30]} [2019-12-07 21:53:37,889 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2043615114] [2019-12-07 21:53:37,890 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@e2cc498 [2019-12-07 21:53:37,890 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1312378736] [2019-12-07 21:53:37,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/bin/utaipan/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 21:53:38,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:53:38,069 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 47 conjunts are in the unsatisfiable core [2019-12-07 21:53:38,070 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@e2cc498 [2019-12-07 21:53:38,070 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905201777] [2019-12-07 21:53:38,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_41b3aa71-e317-48fc-9aff-d7c6f495040d/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:53:38,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:53:38,124 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 36 conjunts are in the unsatisfiable core [2019-12-07 21:53:38,125 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@e2cc498 [2019-12-07 21:53:38,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2019-12-07 21:53:38,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2019-12-07 21:53:38,125 ERROR L206 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2019-12-07 21:53:38,125 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 21:53:38,729 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3,10 cvc4 --incremental --print-success --lang smt --rewrite-divk,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:53:38,743 WARN L229 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2019-12-07 21:53:38,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 09:53:38 BoogieIcfgContainer [2019-12-07 21:53:38,744 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 21:53:38,744 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 21:53:38,744 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 21:53:38,744 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 21:53:38,744 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 09:53:32" (3/4) ... [2019-12-07 21:53:38,746 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-12-07 21:53:38,747 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 21:53:38,748 INFO L168 Benchmark]: Toolchain (without parser) took 6899.43 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 195.6 MB). Free memory was 947.0 MB in the beginning and 945.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 197.2 MB. Max. memory is 11.5 GB. [2019-12-07 21:53:38,748 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 21:53:38,748 INFO L168 Benchmark]: CACSL2BoogieTranslator took 325.40 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.5 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -153.4 MB). Peak memory consumption was 26.4 MB. Max. memory is 11.5 GB. [2019-12-07 21:53:38,748 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.50 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: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-12-07 21:53:38,749 INFO L168 Benchmark]: Boogie Preprocessor took 22.91 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 21:53:38,749 INFO L168 Benchmark]: RCFGBuilder took 259.03 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: 31.3 MB). Peak memory consumption was 31.3 MB. Max. memory is 11.5 GB. [2019-12-07 21:53:38,749 INFO L168 Benchmark]: TraceAbstraction took 6253.78 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 76.0 MB). Free memory was 1.1 GB in the beginning and 945.4 MB in the end (delta: 117.0 MB). Peak memory consumption was 193.0 MB. Max. memory is 11.5 GB. [2019-12-07 21:53:38,750 INFO L168 Benchmark]: Witness Printer took 2.80 ms. Allocated memory is still 1.2 GB. Free memory is still 945.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 21:53:38,751 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 325.40 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.5 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -153.4 MB). Peak memory consumption was 26.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 31.50 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: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 22.91 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. * RCFGBuilder took 259.03 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: 31.3 MB). Peak memory consumption was 31.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6253.78 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 76.0 MB). Free memory was 1.1 GB in the beginning and 945.4 MB in the end (delta: 117.0 MB). Peak memory consumption was 193.0 MB. Max. memory is 11.5 GB. * Witness Printer took 2.80 ms. Allocated memory is still 1.2 GB. Free memory is still 945.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 609]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L585] const int len = 5; [L586] const int data_init = 1; [L564] SLL const last = (SLL) malloc(sizeof(struct node)); [L565] COND FALSE !(((void *)0) == last) [L568] last->next = last [L569] last->data = data [L570] SLL head = last; [L571] COND TRUE len > 1 [L572] SLL new_head = (SLL) malloc(sizeof(struct node)); [L573] COND FALSE !(((void *)0) == new_head) [L576] new_head->next = head [L577] new_head->data = data [L578] head = new_head [L579] len-- [L571] COND TRUE len > 1 [L572] SLL new_head = (SLL) malloc(sizeof(struct node)); [L573] COND FALSE !(((void *)0) == new_head) [L576] new_head->next = head [L577] new_head->data = data [L578] head = new_head [L579] len-- [L571] COND TRUE len > 1 [L572] SLL new_head = (SLL) malloc(sizeof(struct node)); [L573] COND FALSE !(((void *)0) == new_head) [L576] new_head->next = head [L577] new_head->data = data [L578] head = new_head [L579] len-- [L571] COND TRUE len > 1 [L572] SLL new_head = (SLL) malloc(sizeof(struct node)); [L573] COND FALSE !(((void *)0) == new_head) [L576] new_head->next = head [L577] new_head->data = data [L578] head = new_head [L579] len-- [L571] COND FALSE !(len > 1) [L581] last->next = head [L582] return head; [L587] SLL const head = sll_circular_create(len, data_init); [L588] int data_new = 1; [L589] SLL ptr = head; [L591] EXPR ptr->data [L591] COND FALSE !(data_init != ptr->data) [L594] ptr->data = data_new [L595] EXPR ptr->next [L595] ptr = ptr->next [L596] data_new++ [L597] COND TRUE ptr != head [L591] EXPR ptr->data [L591] COND TRUE data_init != ptr->data [L609] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 1 error locations. Result: UNKNOWN, OverallTime: 6.2s, OverallIterations: 4, TraceHistogramMax: 4, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 60 SDtfs, 84 SDslu, 166 SDs, 0 SdLazy, 106 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 242 GetRequests, 201 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=3, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 124 NumberOfCodeBlocks, 124 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 234 ConstructedInterpolants, 6 QuantifiedInterpolants, 30702 SizeOfPredicates, 69 NumberOfNonLiveVariables, 600 ConjunctsInSsa, 80 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 90/162 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...