./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i -s /tmp/vcloud-vcloud-master/worker/run_dir_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 04d17eda3d030bee53a60ea5a86a683be82674c1 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i -s /tmp/vcloud-vcloud-master/worker/run_dir_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 04d17eda3d030bee53a60ea5a86a683be82674c1 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: UnsupportedOperationException: expected NNF --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-15 22:36:30,018 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 22:36:30,020 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 22:36:30,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 22:36:30,034 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 22:36:30,035 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 22:36:30,037 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 22:36:30,047 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 22:36:30,051 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 22:36:30,055 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 22:36:30,057 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 22:36:30,058 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 22:36:30,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 22:36:30,061 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 22:36:30,062 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 22:36:30,062 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 22:36:30,063 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 22:36:30,064 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 22:36:30,066 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 22:36:30,070 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 22:36:30,073 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 22:36:30,075 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 22:36:30,078 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 22:36:30,079 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 22:36:30,082 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 22:36:30,082 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 22:36:30,082 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 22:36:30,084 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 22:36:30,084 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 22:36:30,085 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 22:36:30,085 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 22:36:30,086 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 22:36:30,086 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 22:36:30,087 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 22:36:30,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 22:36:30,089 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 22:36:30,090 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 22:36:30,090 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 22:36:30,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 22:36:30,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 22:36:30,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 22:36:30,093 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-15 22:36:30,118 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 22:36:30,127 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 22:36:30,129 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 22:36:30,129 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 22:36:30,129 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 22:36:30,129 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 22:36:30,130 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 22:36:30,130 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 22:36:30,130 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 22:36:30,130 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 22:36:30,131 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 22:36:30,131 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 22:36:30,131 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 22:36:30,131 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 22:36:30,132 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 22:36:30,133 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 22:36:30,133 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 22:36:30,133 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 22:36:30,134 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 22:36:30,134 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 22:36:30,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 22:36:30,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 22:36:30,135 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 22:36:30,135 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 22:36:30,135 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 22:36:30,135 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 22:36:30,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-15 22:36:30,136 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 22:36:30,136 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer 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 -> Automizer 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 -> 04d17eda3d030bee53a60ea5a86a683be82674c1 [2019-11-15 22:36:30,169 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 22:36:30,183 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 22:36:30,186 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 22:36:30,187 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 22:36:30,188 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 22:36:30,188 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer/../../sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i [2019-11-15 22:36:30,247 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer/data/f5e686b61/60aad413aa824c0daa44087909a008b1/FLAG6b64bd7f0 [2019-11-15 22:36:30,744 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 22:36:30,745 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_92ceb48b-9480-441a-b36f-36f9d3d6bd21/sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i [2019-11-15 22:36:30,766 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer/data/f5e686b61/60aad413aa824c0daa44087909a008b1/FLAG6b64bd7f0 [2019-11-15 22:36:31,077 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer/data/f5e686b61/60aad413aa824c0daa44087909a008b1 [2019-11-15 22:36:31,080 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 22:36:31,081 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 22:36:31,082 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 22:36:31,082 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 22:36:31,085 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 22:36:31,091 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 10:36:31" (1/1) ... [2019-11-15 22:36:31,094 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15509908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:36:31, skipping insertion in model container [2019-11-15 22:36:31,094 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 10:36:31" (1/1) ... [2019-11-15 22:36:31,101 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 22:36:31,153 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 22:36:31,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 22:36:31,526 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 22:36:31,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 22:36:31,658 INFO L192 MainTranslator]: Completed translation [2019-11-15 22:36:31,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:36:31 WrapperNode [2019-11-15 22:36:31,659 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 22:36:31,659 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 22:36:31,659 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 22:36:31,660 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 22:36:31,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:36:31" (1/1) ... [2019-11-15 22:36:31,680 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:36:31" (1/1) ... [2019-11-15 22:36:31,700 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 22:36:31,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 22:36:31,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 22:36:31,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 22:36:31,709 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:36:31" (1/1) ... [2019-11-15 22:36:31,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:36:31" (1/1) ... [2019-11-15 22:36:31,713 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:36:31" (1/1) ... [2019-11-15 22:36:31,713 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:36:31" (1/1) ... [2019-11-15 22:36:31,720 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:36:31" (1/1) ... [2019-11-15 22:36:31,725 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:36:31" (1/1) ... [2019-11-15 22:36:31,726 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:36:31" (1/1) ... [2019-11-15 22:36:31,730 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 22:36:31,730 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 22:36:31,730 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 22:36:31,730 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 22:36:31,731 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:36:31" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 22:36:31,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-15 22:36:31,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-15 22:36:31,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-15 22:36:31,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-15 22:36:31,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-15 22:36:31,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-15 22:36:31,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-15 22:36:31,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 22:36:31,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 22:36:32,243 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 22:36:32,244 INFO L284 CfgBuilder]: Removed 13 assume(true) statements. [2019-11-15 22:36:32,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 10:36:32 BoogieIcfgContainer [2019-11-15 22:36:32,246 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 22:36:32,246 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 22:36:32,247 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 22:36:32,249 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 22:36:32,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 10:36:31" (1/3) ... [2019-11-15 22:36:32,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a13f62b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 10:36:32, skipping insertion in model container [2019-11-15 22:36:32,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:36:31" (2/3) ... [2019-11-15 22:36:32,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a13f62b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 10:36:32, skipping insertion in model container [2019-11-15 22:36:32,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 10:36:32" (3/3) ... [2019-11-15 22:36:32,260 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2n_remove_all_reverse.i [2019-11-15 22:36:32,270 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 22:36:32,280 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 22:36:32,290 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 22:36:32,309 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 22:36:32,309 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 22:36:32,309 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 22:36:32,310 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 22:36:32,310 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 22:36:32,310 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 22:36:32,310 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 22:36:32,310 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 22:36:32,322 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-15 22:36:32,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-15 22:36:32,328 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:36:32,328 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:36:32,330 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:36:32,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:36:32,336 INFO L82 PathProgramCache]: Analyzing trace with hash -717862130, now seen corresponding path program 1 times [2019-11-15 22:36:32,343 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:36:32,343 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241101327] [2019-11-15 22:36:32,343 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:36:32,344 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:36:32,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:36:32,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:36:32,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:36:32,460 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241101327] [2019-11-15 22:36:32,461 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:36:32,461 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-15 22:36:32,461 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206814498] [2019-11-15 22:36:32,465 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-15 22:36:32,465 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:36:32,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-15 22:36:32,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-15 22:36:32,477 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2019-11-15 22:36:32,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:36:32,490 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2019-11-15 22:36:32,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-15 22:36:32,491 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-11-15 22:36:32,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:36:32,498 INFO L225 Difference]: With dead ends: 38 [2019-11-15 22:36:32,498 INFO L226 Difference]: Without dead ends: 19 [2019-11-15 22:36:32,501 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-15 22:36:32,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-15 22:36:32,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-15 22:36:32,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-15 22:36:32,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2019-11-15 22:36:32,529 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2019-11-15 22:36:32,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:36:32,530 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2019-11-15 22:36:32,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-15 22:36:32,530 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2019-11-15 22:36:32,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-15 22:36:32,531 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:36:32,531 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:36:32,531 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:36:32,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:36:32,532 INFO L82 PathProgramCache]: Analyzing trace with hash -718636696, now seen corresponding path program 1 times [2019-11-15 22:36:32,532 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:36:32,532 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314306128] [2019-11-15 22:36:32,532 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:36:32,533 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:36:32,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:36:32,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:36:32,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:36:32,579 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314306128] [2019-11-15 22:36:32,580 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:36:32,580 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-15 22:36:32,580 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244823432] [2019-11-15 22:36:32,581 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-15 22:36:32,581 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:36:32,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-15 22:36:32,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 22:36:32,582 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 3 states. [2019-11-15 22:36:32,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:36:32,600 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2019-11-15 22:36:32,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 22:36:32,600 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-15 22:36:32,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:36:32,601 INFO L225 Difference]: With dead ends: 36 [2019-11-15 22:36:32,601 INFO L226 Difference]: Without dead ends: 24 [2019-11-15 22:36:32,602 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 22:36:32,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-15 22:36:32,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2019-11-15 22:36:32,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-15 22:36:32,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-11-15 22:36:32,607 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 9 [2019-11-15 22:36:32,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:36:32,607 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-11-15 22:36:32,607 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-15 22:36:32,607 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-11-15 22:36:32,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-15 22:36:32,608 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:36:32,608 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:36:32,609 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:36:32,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:36:32,609 INFO L82 PathProgramCache]: Analyzing trace with hash -335176259, now seen corresponding path program 1 times [2019-11-15 22:36:32,609 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:36:32,610 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751258262] [2019-11-15 22:36:32,610 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:36:32,610 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:36:32,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:36:32,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:36:32,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:36:32,687 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751258262] [2019-11-15 22:36:32,687 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:36:32,687 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-15 22:36:32,687 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218282339] [2019-11-15 22:36:32,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-15 22:36:32,688 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:36:32,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-15 22:36:32,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 22:36:32,688 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2019-11-15 22:36:32,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:36:32,735 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2019-11-15 22:36:32,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 22:36:32,736 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-15 22:36:32,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:36:32,737 INFO L225 Difference]: With dead ends: 41 [2019-11-15 22:36:32,737 INFO L226 Difference]: Without dead ends: 24 [2019-11-15 22:36:32,738 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 22:36:32,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-15 22:36:32,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-11-15 22:36:32,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-15 22:36:32,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-11-15 22:36:32,745 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2019-11-15 22:36:32,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:36:32,746 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-11-15 22:36:32,746 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-15 22:36:32,746 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-11-15 22:36:32,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-15 22:36:32,749 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:36:32,749 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:36:32,749 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:36:32,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:36:32,750 INFO L82 PathProgramCache]: Analyzing trace with hash 344882111, now seen corresponding path program 1 times [2019-11-15 22:36:32,750 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:36:32,750 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227778654] [2019-11-15 22:36:32,750 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:36:32,751 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:36:32,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:36:32,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:36:32,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:36:32,834 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227778654] [2019-11-15 22:36:32,834 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375183777] [2019-11-15 22:36:32,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer/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 [2019-11-15 22:36:32,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:36:32,919 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-15 22:36:32,924 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:36:32,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:36:32,961 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:36:32,961 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-15 22:36:32,961 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964084871] [2019-11-15 22:36:32,961 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 22:36:32,962 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:36:32,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 22:36:32,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-15 22:36:32,962 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2019-11-15 22:36:32,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:36:32,984 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2019-11-15 22:36:32,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 22:36:32,985 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-11-15 22:36:32,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:36:32,986 INFO L225 Difference]: With dead ends: 37 [2019-11-15 22:36:32,986 INFO L226 Difference]: Without dead ends: 25 [2019-11-15 22:36:32,986 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-15 22:36:32,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-15 22:36:32,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-15 22:36:32,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-15 22:36:32,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-11-15 22:36:32,990 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 14 [2019-11-15 22:36:32,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:36:32,990 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-11-15 22:36:32,990 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 22:36:32,990 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-11-15 22:36:32,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-15 22:36:32,991 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:36:32,991 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:36:33,192 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:36:33,192 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:36:33,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:36:33,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1454868026, now seen corresponding path program 1 times [2019-11-15 22:36:33,193 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:36:33,193 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941676030] [2019-11-15 22:36:33,193 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:36:33,193 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:36:33,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:36:33,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:36:33,277 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:36:33,277 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941676030] [2019-11-15 22:36:33,277 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691099631] [2019-11-15 22:36:33,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer/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 [2019-11-15 22:36:33,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:36:33,359 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-15 22:36:33,361 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:36:33,366 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-15 22:36:33,366 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-15 22:36:33,366 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2019-11-15 22:36:33,367 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244452050] [2019-11-15 22:36:33,367 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 22:36:33,367 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:36:33,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 22:36:33,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-15 22:36:33,368 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 4 states. [2019-11-15 22:36:33,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:36:33,397 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2019-11-15 22:36:33,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 22:36:33,398 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-11-15 22:36:33,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:36:33,399 INFO L225 Difference]: With dead ends: 35 [2019-11-15 22:36:33,399 INFO L226 Difference]: Without dead ends: 31 [2019-11-15 22:36:33,400 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-15 22:36:33,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-15 22:36:33,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2019-11-15 22:36:33,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-15 22:36:33,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-15 22:36:33,405 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 19 [2019-11-15 22:36:33,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:36:33,405 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-15 22:36:33,405 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 22:36:33,405 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-15 22:36:33,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-15 22:36:33,406 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:36:33,406 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:36:33,606 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:36:33,607 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:36:33,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:36:33,607 INFO L82 PathProgramCache]: Analyzing trace with hash -349283435, now seen corresponding path program 1 times [2019-11-15 22:36:33,607 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:36:33,607 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970749991] [2019-11-15 22:36:33,608 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:36:33,608 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:36:33,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:36:33,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:36:33,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:36:33,694 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970749991] [2019-11-15 22:36:33,694 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488942392] [2019-11-15 22:36:33,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer/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 [2019-11-15 22:36:33,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:36:33,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-15 22:36:33,787 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:36:33,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-15 22:36:33,806 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:36:33,806 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2019-11-15 22:36:33,806 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192904490] [2019-11-15 22:36:33,812 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-15 22:36:33,813 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:36:33,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-15 22:36:33,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-15 22:36:33,814 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 6 states. [2019-11-15 22:36:33,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:36:33,890 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2019-11-15 22:36:33,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 22:36:33,892 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2019-11-15 22:36:33,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:36:33,892 INFO L225 Difference]: With dead ends: 36 [2019-11-15 22:36:33,893 INFO L226 Difference]: Without dead ends: 32 [2019-11-15 22:36:33,893 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-15 22:36:33,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-15 22:36:33,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-15 22:36:33,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-15 22:36:33,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2019-11-15 22:36:33,898 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 22 [2019-11-15 22:36:33,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:36:33,899 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2019-11-15 22:36:33,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-15 22:36:33,899 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2019-11-15 22:36:33,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-15 22:36:33,900 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:36:33,900 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:36:34,100 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:36:34,101 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:36:34,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:36:34,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1982925978, now seen corresponding path program 2 times [2019-11-15 22:36:34,101 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:36:34,102 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013836171] [2019-11-15 22:36:34,102 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:36:34,102 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:36:34,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:36:34,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:36:34,175 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-15 22:36:34,175 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013836171] [2019-11-15 22:36:34,175 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:36:34,175 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-15 22:36:34,176 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362435494] [2019-11-15 22:36:34,176 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 22:36:34,176 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:36:34,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 22:36:34,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-15 22:36:34,177 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 5 states. [2019-11-15 22:36:34,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:36:34,278 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2019-11-15 22:36:34,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 22:36:34,278 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2019-11-15 22:36:34,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:36:34,279 INFO L225 Difference]: With dead ends: 44 [2019-11-15 22:36:34,279 INFO L226 Difference]: Without dead ends: 32 [2019-11-15 22:36:34,280 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-15 22:36:34,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-15 22:36:34,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-15 22:36:34,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-15 22:36:34,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-11-15 22:36:34,284 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 25 [2019-11-15 22:36:34,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:36:34,285 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-11-15 22:36:34,285 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 22:36:34,285 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-11-15 22:36:34,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-15 22:36:34,286 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:36:34,286 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:36:34,286 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:36:34,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:36:34,287 INFO L82 PathProgramCache]: Analyzing trace with hash 432541788, now seen corresponding path program 1 times [2019-11-15 22:36:34,287 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:36:34,287 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005366234] [2019-11-15 22:36:34,287 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:36:34,287 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:36:34,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:36:34,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:36:34,942 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:36:34,943 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005366234] [2019-11-15 22:36:34,943 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628639473] [2019-11-15 22:36:34,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:36:35,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:36:35,048 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 58 conjunts are in the unsatisfiable core [2019-11-15 22:36:35,053 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:36:35,406 INFO L375 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 21 treesize of output 20 [2019-11-15 22:36:35,407 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:36:35,418 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:36:35,419 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:36:35,419 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:24 [2019-11-15 22:36:35,705 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:36:35,725 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 22:36:35,727 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:36:35,727 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 60 [2019-11-15 22:36:35,729 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:36:35,771 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:36:35,778 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 22:36:35,779 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:36:35,779 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 50 [2019-11-15 22:36:35,780 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:36:35,821 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:36:35,823 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2019-11-15 22:36:35,823 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:159, output treesize:99 [2019-11-15 22:36:35,942 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:36:35,942 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-15 22:36:35,943 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [14] total 24 [2019-11-15 22:36:35,943 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718456142] [2019-11-15 22:36:35,943 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-15 22:36:35,943 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:36:35,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-15 22:36:35,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2019-11-15 22:36:35,944 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 12 states. [2019-11-15 22:36:36,453 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2019-11-15 22:36:36,680 WARN L191 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2019-11-15 22:36:36,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:36:36,752 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2019-11-15 22:36:36,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-15 22:36:36,753 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2019-11-15 22:36:36,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:36:36,754 INFO L225 Difference]: With dead ends: 68 [2019-11-15 22:36:36,754 INFO L226 Difference]: Without dead ends: 58 [2019-11-15 22:36:36,755 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2019-11-15 22:36:36,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-15 22:36:36,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2019-11-15 22:36:36,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-15 22:36:36,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2019-11-15 22:36:36,763 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 31 [2019-11-15 22:36:36,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:36:36,763 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2019-11-15 22:36:36,764 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-15 22:36:36,764 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2019-11-15 22:36:36,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-15 22:36:36,765 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:36:36,765 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:36:36,969 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:36:36,969 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:36:36,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:36:36,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1860510687, now seen corresponding path program 1 times [2019-11-15 22:36:36,970 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:36:36,970 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246343817] [2019-11-15 22:36:36,970 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:36:36,970 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:36:36,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:36:37,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:36:37,332 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-15 22:36:37,332 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246343817] [2019-11-15 22:36:37,333 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510465022] [2019-11-15 22:36:37,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:36:37,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:36:37,432 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 73 conjunts are in the unsatisfiable core [2019-11-15 22:36:37,437 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:36:37,810 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 22:36:37,834 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:36:37,834 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 92 [2019-11-15 22:36:37,835 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:36:37,887 INFO L567 ElimStorePlain]: treesize reduction 40, result has 63.0 percent of original size [2019-11-15 22:36:37,904 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:36:37,904 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 70 [2019-11-15 22:36:37,905 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-15 22:36:37,937 INFO L567 ElimStorePlain]: treesize reduction 40, result has 61.5 percent of original size [2019-11-15 22:36:37,937 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:36:37,938 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:84, output treesize:64 [2019-11-15 22:36:38,259 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:36:38,259 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:36:38,259 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2019-11-15 22:36:38,259 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229544498] [2019-11-15 22:36:38,260 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-15 22:36:38,260 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:36:38,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-15 22:36:38,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2019-11-15 22:36:38,261 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 27 states. [2019-11-15 22:36:38,835 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2019-11-15 22:36:38,963 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2019-11-15 22:36:39,117 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2019-11-15 22:36:39,292 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 69 [2019-11-15 22:36:39,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:36:39,426 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2019-11-15 22:36:39,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-15 22:36:39,441 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 33 [2019-11-15 22:36:39,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:36:39,442 INFO L225 Difference]: With dead ends: 87 [2019-11-15 22:36:39,442 INFO L226 Difference]: Without dead ends: 44 [2019-11-15 22:36:39,443 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=282, Invalid=1050, Unknown=0, NotChecked=0, Total=1332 [2019-11-15 22:36:39,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-15 22:36:39,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-15 22:36:39,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-15 22:36:39,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2019-11-15 22:36:39,450 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 33 [2019-11-15 22:36:39,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:36:39,450 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2019-11-15 22:36:39,451 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-15 22:36:39,451 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2019-11-15 22:36:39,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-15 22:36:39,452 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:36:39,452 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:36:39,663 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:36:39,663 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:36:39,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:36:39,664 INFO L82 PathProgramCache]: Analyzing trace with hash 289325857, now seen corresponding path program 2 times [2019-11-15 22:36:39,664 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:36:39,664 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476320139] [2019-11-15 22:36:39,664 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:36:39,664 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:36:39,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:36:39,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:36:39,947 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:36:39,947 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476320139] [2019-11-15 22:36:39,947 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288535122] [2019-11-15 22:36:39,947 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:36:40,042 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 22:36:40,043 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:36:40,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 62 conjunts are in the unsatisfiable core [2019-11-15 22:36:40,051 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:36:40,330 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 22:36:40,331 INFO L375 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 46 [2019-11-15 22:36:40,332 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:36:40,343 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:36:40,346 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 22:36:40,347 INFO L375 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2019-11-15 22:36:40,347 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-15 22:36:40,357 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:36:40,357 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:36:40,358 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:74, output treesize:46 [2019-11-15 22:36:40,402 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 22:36:40,402 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-15 22:36:40,404 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:36:40,404 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 38 [2019-11-15 22:36:40,405 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:36:40,415 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:36:40,416 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:36:40,416 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:80, output treesize:43 [2019-11-15 22:36:40,467 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:36:40,467 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:36:40,467 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2019-11-15 22:36:40,467 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563655668] [2019-11-15 22:36:40,470 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-15 22:36:40,471 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:36:40,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-15 22:36:40,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2019-11-15 22:36:40,471 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 22 states. [2019-11-15 22:36:41,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:36:41,396 INFO L93 Difference]: Finished difference Result 87 states and 101 transitions. [2019-11-15 22:36:41,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-15 22:36:41,397 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 33 [2019-11-15 22:36:41,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:36:41,398 INFO L225 Difference]: With dead ends: 87 [2019-11-15 22:36:41,398 INFO L226 Difference]: Without dead ends: 61 [2019-11-15 22:36:41,399 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=326, Invalid=1006, Unknown=0, NotChecked=0, Total=1332 [2019-11-15 22:36:41,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-15 22:36:41,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2019-11-15 22:36:41,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-15 22:36:41,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2019-11-15 22:36:41,408 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 33 [2019-11-15 22:36:41,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:36:41,408 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2019-11-15 22:36:41,408 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-15 22:36:41,408 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2019-11-15 22:36:41,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-15 22:36:41,409 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:36:41,410 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:36:41,612 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:36:41,613 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:36:41,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:36:41,613 INFO L82 PathProgramCache]: Analyzing trace with hash 97769638, now seen corresponding path program 3 times [2019-11-15 22:36:41,613 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:36:41,613 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790415158] [2019-11-15 22:36:41,613 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:36:41,613 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:36:41,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:36:41,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:36:41,915 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-15 22:36:41,915 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790415158] [2019-11-15 22:36:41,915 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116008185] [2019-11-15 22:36:41,915 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer/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 [2019-11-15 22:36:41,991 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-15 22:36:41,991 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:36:41,992 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-15 22:36:41,994 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:36:42,013 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:36:42,046 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:36:42,069 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:36:42,069 INFO L375 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 53 treesize of output 42 [2019-11-15 22:36:42,070 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:36:42,071 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:36:42,071 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:36:42,084 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:36:42,084 INFO L375 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 53 treesize of output 52 [2019-11-15 22:36:42,085 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:36:42,086 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:36:42,086 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:36:42,121 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:36:42,322 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:36:42,323 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.UnsupportedOperationException: expected NNF at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.UnsupportedOperationException: expected NNF at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:236) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive$TermWalker.walk(NonRecursive.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:195) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder.(ArrayOccurrenceAnalysis.java:181) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.(ArrayOccurrenceAnalysis.java:74) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:275) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:253) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:245) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:292) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:299) ... 21 more [2019-11-15 22:36:42,327 INFO L168 Benchmark]: Toolchain (without parser) took 11245.39 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 338.2 MB). Free memory was 946.1 MB in the beginning and 1.2 GB in the end (delta: -257.5 MB). Peak memory consumption was 80.7 MB. Max. memory is 11.5 GB. [2019-11-15 22:36:42,327 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 22:36:42,330 INFO L168 Benchmark]: CACSL2BoogieTranslator took 576.82 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 174.1 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -199.1 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. [2019-11-15 22:36:42,333 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.40 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 22:36:42,334 INFO L168 Benchmark]: Boogie Preprocessor took 29.78 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: 6.4 MB). Peak memory consumption was 6.4 MB. Max. memory is 11.5 GB. [2019-11-15 22:36:42,334 INFO L168 Benchmark]: RCFGBuilder took 515.68 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: 26.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 11.5 GB. [2019-11-15 22:36:42,334 INFO L168 Benchmark]: TraceAbstraction took 10078.92 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 164.1 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -91.6 MB). Peak memory consumption was 72.5 MB. Max. memory is 11.5 GB. [2019-11-15 22:36:42,339 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 576.82 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 174.1 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -199.1 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 40.40 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 29.78 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: 6.4 MB). Peak memory consumption was 6.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 515.68 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: 26.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 10078.92 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 164.1 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -91.6 MB). Peak memory consumption was 72.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.UnsupportedOperationException: expected NNF de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.UnsupportedOperationException: expected NNF: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:307) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-cad4683 [2019-11-15 22:36:44,541 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 22:36:44,543 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 22:36:44,558 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 22:36:44,559 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 22:36:44,560 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 22:36:44,563 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 22:36:44,572 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 22:36:44,575 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 22:36:44,578 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 22:36:44,579 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 22:36:44,581 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 22:36:44,581 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 22:36:44,583 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 22:36:44,584 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 22:36:44,586 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 22:36:44,587 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 22:36:44,589 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 22:36:44,591 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 22:36:44,594 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 22:36:44,597 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 22:36:44,599 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 22:36:44,601 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 22:36:44,604 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 22:36:44,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 22:36:44,607 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 22:36:44,607 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 22:36:44,608 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 22:36:44,609 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 22:36:44,609 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 22:36:44,610 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 22:36:44,610 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 22:36:44,611 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 22:36:44,611 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 22:36:44,613 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 22:36:44,613 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 22:36:44,614 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 22:36:44,614 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 22:36:44,614 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 22:36:44,615 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 22:36:44,616 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 22:36:44,617 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-11-15 22:36:44,642 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 22:36:44,653 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 22:36:44,654 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 22:36:44,654 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 22:36:44,654 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 22:36:44,655 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 22:36:44,655 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 22:36:44,655 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 22:36:44,655 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 22:36:44,655 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 22:36:44,656 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 22:36:44,656 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 22:36:44,656 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-15 22:36:44,656 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-15 22:36:44,656 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 22:36:44,657 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 22:36:44,657 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 22:36:44,657 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 22:36:44,657 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 22:36:44,658 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 22:36:44,658 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 22:36:44,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 22:36:44,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 22:36:44,659 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 22:36:44,659 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 22:36:44,659 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 22:36:44,660 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-15 22:36:44,660 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-15 22:36:44,660 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 22:36:44,661 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-15 22:36:44,661 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_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer 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 -> Automizer 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 -> 04d17eda3d030bee53a60ea5a86a683be82674c1 [2019-11-15 22:36:44,703 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 22:36:44,719 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 22:36:44,725 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 22:36:44,727 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 22:36:44,728 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 22:36:44,729 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer/../../sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i [2019-11-15 22:36:44,788 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer/data/1f8a569f3/3ff4a9b390df4dbbb60956d8f0c10099/FLAG4c3bb2920 [2019-11-15 22:36:45,298 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 22:36:45,301 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_92ceb48b-9480-441a-b36f-36f9d3d6bd21/sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i [2019-11-15 22:36:45,324 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer/data/1f8a569f3/3ff4a9b390df4dbbb60956d8f0c10099/FLAG4c3bb2920 [2019-11-15 22:36:45,617 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer/data/1f8a569f3/3ff4a9b390df4dbbb60956d8f0c10099 [2019-11-15 22:36:45,619 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 22:36:45,619 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 22:36:45,620 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 22:36:45,621 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 22:36:45,623 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 22:36:45,624 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 10:36:45" (1/1) ... [2019-11-15 22:36:45,626 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b000ae3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:36:45, skipping insertion in model container [2019-11-15 22:36:45,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 10:36:45" (1/1) ... [2019-11-15 22:36:45,633 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 22:36:45,665 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 22:36:46,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 22:36:46,061 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 22:36:46,101 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 22:36:46,157 INFO L192 MainTranslator]: Completed translation [2019-11-15 22:36:46,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:36:46 WrapperNode [2019-11-15 22:36:46,158 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 22:36:46,159 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 22:36:46,159 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 22:36:46,159 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 22:36:46,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:36:46" (1/1) ... [2019-11-15 22:36:46,185 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:36:46" (1/1) ... [2019-11-15 22:36:46,208 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 22:36:46,208 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 22:36:46,208 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 22:36:46,208 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 22:36:46,217 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:36:46" (1/1) ... [2019-11-15 22:36:46,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:36:46" (1/1) ... [2019-11-15 22:36:46,221 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:36:46" (1/1) ... [2019-11-15 22:36:46,222 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:36:46" (1/1) ... [2019-11-15 22:36:46,232 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:36:46" (1/1) ... [2019-11-15 22:36:46,236 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:36:46" (1/1) ... [2019-11-15 22:36:46,239 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:36:46" (1/1) ... [2019-11-15 22:36:46,243 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 22:36:46,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 22:36:46,244 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 22:36:46,244 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 22:36:46,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:36:46" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 22:36:46,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-15 22:36:46,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-15 22:36:46,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-15 22:36:46,305 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-15 22:36:46,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-15 22:36:46,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-15 22:36:46,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-15 22:36:46,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 22:36:46,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 22:36:46,681 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 22:36:46,681 INFO L284 CfgBuilder]: Removed 13 assume(true) statements. [2019-11-15 22:36:46,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 10:36:46 BoogieIcfgContainer [2019-11-15 22:36:46,682 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 22:36:46,683 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 22:36:46,683 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 22:36:46,685 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 22:36:46,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 10:36:45" (1/3) ... [2019-11-15 22:36:46,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9e272f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 10:36:46, skipping insertion in model container [2019-11-15 22:36:46,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:36:46" (2/3) ... [2019-11-15 22:36:46,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9e272f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 10:36:46, skipping insertion in model container [2019-11-15 22:36:46,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 10:36:46" (3/3) ... [2019-11-15 22:36:46,688 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2n_remove_all_reverse.i [2019-11-15 22:36:46,697 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 22:36:46,703 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 22:36:46,712 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 22:36:46,731 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 22:36:46,731 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 22:36:46,731 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 22:36:46,731 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 22:36:46,731 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 22:36:46,732 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 22:36:46,732 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 22:36:46,732 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 22:36:46,744 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-15 22:36:46,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-15 22:36:46,749 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:36:46,750 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:36:46,751 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:36:46,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:36:46,755 INFO L82 PathProgramCache]: Analyzing trace with hash -717862130, now seen corresponding path program 1 times [2019-11-15 22:36:46,762 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 22:36:46,763 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1383983882] [2019-11-15 22:36:46,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 22:36:46,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:36:46,857 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-15 22:36:46,864 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:36:46,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:36:46,880 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 22:36:46,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:36:46,889 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1383983882] [2019-11-15 22:36:46,889 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:36:46,890 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-15 22:36:46,890 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594630581] [2019-11-15 22:36:46,896 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-15 22:36:46,896 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 22:36:46,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-15 22:36:46,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-15 22:36:46,914 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2019-11-15 22:36:46,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:36:46,934 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2019-11-15 22:36:46,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-15 22:36:46,937 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-11-15 22:36:46,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:36:46,945 INFO L225 Difference]: With dead ends: 38 [2019-11-15 22:36:46,946 INFO L226 Difference]: Without dead ends: 19 [2019-11-15 22:36:46,949 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-15 22:36:46,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-15 22:36:46,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-15 22:36:46,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-15 22:36:46,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2019-11-15 22:36:46,978 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2019-11-15 22:36:46,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:36:46,979 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2019-11-15 22:36:46,979 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-15 22:36:46,979 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2019-11-15 22:36:46,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-15 22:36:46,980 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:36:46,980 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:36:47,185 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 22:36:47,185 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:36:47,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:36:47,186 INFO L82 PathProgramCache]: Analyzing trace with hash -718636696, now seen corresponding path program 1 times [2019-11-15 22:36:47,186 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 22:36:47,187 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2101136682] [2019-11-15 22:36:47,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 22:36:47,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:36:47,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-15 22:36:47,302 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:36:47,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:36:47,325 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 22:36:47,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:36:47,347 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2101136682] [2019-11-15 22:36:47,347 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:36:47,348 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-15 22:36:47,348 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104655165] [2019-11-15 22:36:47,351 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 22:36:47,351 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 22:36:47,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 22:36:47,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 22:36:47,352 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 4 states. [2019-11-15 22:36:47,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:36:47,394 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2019-11-15 22:36:47,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 22:36:47,395 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-15 22:36:47,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:36:47,396 INFO L225 Difference]: With dead ends: 37 [2019-11-15 22:36:47,396 INFO L226 Difference]: Without dead ends: 25 [2019-11-15 22:36:47,397 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 22:36:47,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-15 22:36:47,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-15 22:36:47,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-15 22:36:47,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2019-11-15 22:36:47,406 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 9 [2019-11-15 22:36:47,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:36:47,407 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2019-11-15 22:36:47,407 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 22:36:47,407 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2019-11-15 22:36:47,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-15 22:36:47,411 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:36:47,412 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:36:47,614 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 22:36:47,614 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:36:47,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:36:47,615 INFO L82 PathProgramCache]: Analyzing trace with hash -443750776, now seen corresponding path program 1 times [2019-11-15 22:36:47,616 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 22:36:47,616 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1342996563] [2019-11-15 22:36:47,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 22:36:47,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:36:47,710 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-15 22:36:47,711 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:36:47,736 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 22:36:47,741 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 22:36:47,746 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 22:36:47,749 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1342996563] [2019-11-15 22:36:47,749 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:36:47,750 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-15 22:36:47,750 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061186479] [2019-11-15 22:36:47,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-15 22:36:47,753 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 22:36:47,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-15 22:36:47,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 22:36:47,754 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 3 states. [2019-11-15 22:36:47,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:36:47,877 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2019-11-15 22:36:47,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 22:36:47,880 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-15 22:36:47,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:36:47,881 INFO L225 Difference]: With dead ends: 45 [2019-11-15 22:36:47,881 INFO L226 Difference]: Without dead ends: 26 [2019-11-15 22:36:47,881 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 22:36:47,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-15 22:36:47,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2019-11-15 22:36:47,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-15 22:36:47,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-11-15 22:36:47,886 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 19 [2019-11-15 22:36:47,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:36:47,886 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-11-15 22:36:47,886 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-15 22:36:47,887 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-11-15 22:36:47,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-15 22:36:47,887 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:36:47,887 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:36:48,088 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 22:36:48,089 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:36:48,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:36:48,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1454868026, now seen corresponding path program 1 times [2019-11-15 22:36:48,090 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 22:36:48,090 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1822417196] [2019-11-15 22:36:48,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 22:36:48,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:36:48,211 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-15 22:36:48,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:36:48,250 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-15 22:36:48,250 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 22:36:48,289 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-15 22:36:48,294 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1822417196] [2019-11-15 22:36:48,295 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:36:48,295 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-15 22:36:48,295 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913499908] [2019-11-15 22:36:48,296 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-15 22:36:48,297 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 22:36:48,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-15 22:36:48,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-15 22:36:48,298 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 6 states. [2019-11-15 22:36:48,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:36:48,364 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2019-11-15 22:36:48,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 22:36:48,364 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-11-15 22:36:48,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:36:48,365 INFO L225 Difference]: With dead ends: 36 [2019-11-15 22:36:48,366 INFO L226 Difference]: Without dead ends: 32 [2019-11-15 22:36:48,366 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-15 22:36:48,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-15 22:36:48,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-15 22:36:48,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-15 22:36:48,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2019-11-15 22:36:48,373 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 19 [2019-11-15 22:36:48,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:36:48,373 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2019-11-15 22:36:48,374 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-15 22:36:48,374 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2019-11-15 22:36:48,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-15 22:36:48,376 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:36:48,376 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:36:48,578 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 22:36:48,578 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:36:48,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:36:48,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1982925978, now seen corresponding path program 1 times [2019-11-15 22:36:48,579 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 22:36:48,579 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [690316528] [2019-11-15 22:36:48,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 22:36:48,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:36:48,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-15 22:36:48,749 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:36:48,811 INFO L375 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 11 treesize of output 7 [2019-11-15 22:36:48,812 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:36:48,831 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:36:48,836 INFO L375 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 11 treesize of output 7 [2019-11-15 22:36:48,836 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-15 22:36:48,846 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:36:48,846 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:36:48,846 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-11-15 22:36:48,883 INFO L375 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 [2019-11-15 22:36:48,884 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:36:48,893 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:36:48,896 INFO L375 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 [2019-11-15 22:36:48,897 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-15 22:36:48,902 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:36:48,903 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:36:48,903 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2019-11-15 22:36:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-15 22:36:48,918 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 22:36:48,961 INFO L375 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 25 treesize of output 21 [2019-11-15 22:36:48,962 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-15 22:36:48,976 INFO L567 ElimStorePlain]: treesize reduction 15, result has 31.8 percent of original size [2019-11-15 22:36:48,976 INFO L464 ElimStorePlain]: Eliminatee |#memory_$Pointer$.offset| vanished before elimination [2019-11-15 22:36:48,977 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-11-15 22:36:48,977 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:7 [2019-11-15 22:36:49,001 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-15 22:36:49,001 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [690316528] [2019-11-15 22:36:49,001 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:36:49,002 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 8 [2019-11-15 22:36:49,002 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942463066] [2019-11-15 22:36:49,002 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-15 22:36:49,003 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 22:36:49,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-15 22:36:49,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-15 22:36:49,004 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 8 states. [2019-11-15 22:36:49,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:36:49,290 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2019-11-15 22:36:49,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 22:36:49,291 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2019-11-15 22:36:49,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:36:49,292 INFO L225 Difference]: With dead ends: 44 [2019-11-15 22:36:49,292 INFO L226 Difference]: Without dead ends: 32 [2019-11-15 22:36:49,293 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-15 22:36:49,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-15 22:36:49,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-15 22:36:49,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-15 22:36:49,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-11-15 22:36:49,299 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 25 [2019-11-15 22:36:49,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:36:49,299 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-11-15 22:36:49,299 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-15 22:36:49,300 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-11-15 22:36:49,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-15 22:36:49,302 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:36:49,302 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:36:49,504 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 22:36:49,504 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:36:49,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:36:49,505 INFO L82 PathProgramCache]: Analyzing trace with hash 432541788, now seen corresponding path program 1 times [2019-11-15 22:36:49,505 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 22:36:49,505 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [132405326] [2019-11-15 22:36:49,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92ceb48b-9480-441a-b36f-36f9d3d6bd21/bin/uautomizer/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 [2019-11-15 22:36:49,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:36:49,668 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-15 22:36:49,670 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:36:49,692 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:36:49,751 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:36:49,796 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:36:49,796 INFO L375 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 53 treesize of output 52 [2019-11-15 22:36:49,798 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:36:49,799 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:36:49,800 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:36:49,839 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:36:49,840 INFO L375 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 53 treesize of output 42 [2019-11-15 22:36:49,841 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:36:49,843 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:36:49,844 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:36:49,915 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:36:50,116 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 22:36:50,117 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: expected NNF at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:236) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive$TermWalker.walk(NonRecursive.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:195) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder.(ArrayOccurrenceAnalysis.java:181) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.(ArrayOccurrenceAnalysis.java:74) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:275) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:253) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:245) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:292) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) 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.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.checkFeasibility(TraceAbstractionRefinementEngine.java:244) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:160) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-15 22:36:50,121 INFO L168 Benchmark]: Toolchain (without parser) took 4501.26 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 162.5 MB). Free memory was 941.6 MB in the beginning and 918.3 MB in the end (delta: 23.3 MB). Peak memory consumption was 185.8 MB. Max. memory is 11.5 GB. [2019-11-15 22:36:50,121 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 1.0 GB. Free memory is still 972.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 22:36:50,122 INFO L168 Benchmark]: CACSL2BoogieTranslator took 538.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 162.5 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -190.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. [2019-11-15 22:36:50,123 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.05 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: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 11.5 GB. [2019-11-15 22:36:50,123 INFO L168 Benchmark]: Boogie Preprocessor took 35.03 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. [2019-11-15 22:36:50,123 INFO L168 Benchmark]: RCFGBuilder took 439.03 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: 30.2 MB). Peak memory consumption was 30.2 MB. Max. memory is 11.5 GB. [2019-11-15 22:36:50,127 INFO L168 Benchmark]: TraceAbstraction took 3436.57 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 918.3 MB in the end (delta: 182.4 MB). Peak memory consumption was 182.4 MB. Max. memory is 11.5 GB. [2019-11-15 22:36:50,130 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 1.0 GB. Free memory is still 972.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 538.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 162.5 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -190.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 49.05 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 35.03 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 439.03 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 30.2 MB). Peak memory consumption was 30.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3436.57 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 918.3 MB in the end (delta: 182.4 MB). Peak memory consumption was 182.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: UnsupportedOperationException: expected NNF de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: expected NNF: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:236) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...