./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/mbpr4.c --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/working_dir_824d6934-7bd6-4536-9fca-a600712fca25/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_824d6934-7bd6-4536-9fca-a600712fca25/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_824d6934-7bd6-4536-9fca-a600712fca25/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_824d6934-7bd6-4536-9fca-a600712fca25/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/mbpr4.c -s /tmp/vcloud-vcloud-master/worker/working_dir_824d6934-7bd6-4536-9fca-a600712fca25/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_824d6934-7bd6-4536-9fca-a600712fca25/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 162af48526beed8ce59715aaad1198a79a3197bf ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_824d6934-7bd6-4536-9fca-a600712fca25/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_824d6934-7bd6-4536-9fca-a600712fca25/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_824d6934-7bd6-4536-9fca-a600712fca25/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_824d6934-7bd6-4536-9fca-a600712fca25/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/mbpr4.c -s /tmp/vcloud-vcloud-master/worker/working_dir_824d6934-7bd6-4536-9fca-a600712fca25/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_824d6934-7bd6-4536-9fca-a600712fca25/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 162af48526beed8ce59715aaad1198a79a3197bf .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: NullPointerException: null --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 08:57:22,103 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 08:57:22,106 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 08:57:22,116 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 08:57:22,118 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 08:57:22,119 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 08:57:22,120 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 08:57:22,122 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 08:57:22,124 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 08:57:22,127 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 08:57:22,129 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 08:57:22,130 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 08:57:22,135 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 08:57:22,138 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 08:57:22,138 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 08:57:22,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 08:57:22,139 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 08:57:22,140 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 08:57:22,141 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 08:57:22,145 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 08:57:22,146 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 08:57:22,147 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 08:57:22,147 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 08:57:22,148 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 08:57:22,149 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 08:57:22,149 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 08:57:22,150 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 08:57:22,154 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 08:57:22,155 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 08:57:22,156 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 08:57:22,156 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 08:57:22,156 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 08:57:22,157 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 08:57:22,157 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 08:57:22,158 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 08:57:22,159 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 08:57:22,160 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 08:57:22,160 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 08:57:22,160 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 08:57:22,161 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 08:57:22,163 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 08:57:22,164 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_824d6934-7bd6-4536-9fca-a600712fca25/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-22 08:57:22,184 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 08:57:22,184 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 08:57:22,185 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 08:57:22,185 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 08:57:22,185 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 08:57:22,186 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 08:57:22,186 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 08:57:22,186 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 08:57:22,186 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 08:57:22,187 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 08:57:22,187 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 08:57:22,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 08:57:22,188 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 08:57:22,188 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 08:57:22,188 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 08:57:22,188 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 08:57:22,188 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 08:57:22,188 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 08:57:22,189 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 08:57:22,189 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 08:57:22,189 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 08:57:22,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:57:22,189 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 08:57:22,189 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 08:57:22,190 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 08:57:22,190 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 08:57:22,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 08:57:22,191 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 08:57:22,191 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/working_dir_824d6934-7bd6-4536-9fca-a600712fca25/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 -> 162af48526beed8ce59715aaad1198a79a3197bf [2019-10-22 08:57:22,225 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 08:57:22,234 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 08:57:22,237 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 08:57:22,239 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 08:57:22,239 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 08:57:22,240 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_824d6934-7bd6-4536-9fca-a600712fca25/bin/uautomizer/../../sv-benchmarks/c/array-tiling/mbpr4.c [2019-10-22 08:57:22,285 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_824d6934-7bd6-4536-9fca-a600712fca25/bin/uautomizer/data/375455d0b/08453b56fd154919b6735580ac9b7d84/FLAG89ff6f7a6 [2019-10-22 08:57:22,664 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 08:57:22,665 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_824d6934-7bd6-4536-9fca-a600712fca25/sv-benchmarks/c/array-tiling/mbpr4.c [2019-10-22 08:57:22,671 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_824d6934-7bd6-4536-9fca-a600712fca25/bin/uautomizer/data/375455d0b/08453b56fd154919b6735580ac9b7d84/FLAG89ff6f7a6 [2019-10-22 08:57:23,069 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_824d6934-7bd6-4536-9fca-a600712fca25/bin/uautomizer/data/375455d0b/08453b56fd154919b6735580ac9b7d84 [2019-10-22 08:57:23,071 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 08:57:23,072 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 08:57:23,072 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 08:57:23,073 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 08:57:23,076 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 08:57:23,077 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:57:23" (1/1) ... [2019-10-22 08:57:23,079 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e59a856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:23, skipping insertion in model container [2019-10-22 08:57:23,079 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:57:23" (1/1) ... [2019-10-22 08:57:23,086 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 08:57:23,101 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 08:57:23,295 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:57:23,303 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 08:57:23,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:57:23,351 INFO L192 MainTranslator]: Completed translation [2019-10-22 08:57:23,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:23 WrapperNode [2019-10-22 08:57:23,352 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 08:57:23,352 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 08:57:23,353 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 08:57:23,353 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 08:57:23,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:23" (1/1) ... [2019-10-22 08:57:23,378 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:23" (1/1) ... [2019-10-22 08:57:23,418 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 08:57:23,426 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 08:57:23,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 08:57:23,427 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 08:57:23,438 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:23" (1/1) ... [2019-10-22 08:57:23,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:23" (1/1) ... [2019-10-22 08:57:23,442 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:23" (1/1) ... [2019-10-22 08:57:23,442 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:23" (1/1) ... [2019-10-22 08:57:23,461 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:23" (1/1) ... [2019-10-22 08:57:23,471 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:23" (1/1) ... [2019-10-22 08:57:23,472 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:23" (1/1) ... [2019-10-22 08:57:23,474 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 08:57:23,482 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 08:57:23,483 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 08:57:23,483 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 08:57:23,483 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:23" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_824d6934-7bd6-4536-9fca-a600712fca25/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 [2019-10-22 08:57:23,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-22 08:57:23,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 08:57:23,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 08:57:23,552 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-22 08:57:23,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-22 08:57:23,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 08:57:23,902 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 08:57:23,902 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-10-22 08:57:23,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:57:23 BoogieIcfgContainer [2019-10-22 08:57:23,904 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 08:57:23,905 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 08:57:23,905 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 08:57:23,907 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 08:57:23,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 08:57:23" (1/3) ... [2019-10-22 08:57:23,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79cb762d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:57:23, skipping insertion in model container [2019-10-22 08:57:23,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:23" (2/3) ... [2019-10-22 08:57:23,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79cb762d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:57:23, skipping insertion in model container [2019-10-22 08:57:23,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:57:23" (3/3) ... [2019-10-22 08:57:23,911 INFO L109 eAbstractionObserver]: Analyzing ICFG mbpr4.c [2019-10-22 08:57:23,920 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 08:57:23,927 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 08:57:23,937 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 08:57:23,961 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 08:57:23,962 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 08:57:23,962 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 08:57:23,962 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 08:57:23,962 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 08:57:23,962 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 08:57:23,963 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 08:57:23,963 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 08:57:23,981 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2019-10-22 08:57:23,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-22 08:57:23,991 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:23,991 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:23,993 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:23,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:23,998 INFO L82 PathProgramCache]: Analyzing trace with hash 219549199, now seen corresponding path program 1 times [2019-10-22 08:57:24,004 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:24,004 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029887035] [2019-10-22 08:57:24,005 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:24,005 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:24,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:24,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:24,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:24,147 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029887035] [2019-10-22 08:57:24,147 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:24,148 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 08:57:24,148 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196091469] [2019-10-22 08:57:24,152 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 08:57:24,152 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:24,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 08:57:24,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 08:57:24,167 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 2 states. [2019-10-22 08:57:24,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:24,186 INFO L93 Difference]: Finished difference Result 66 states and 95 transitions. [2019-10-22 08:57:24,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 08:57:24,187 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-10-22 08:57:24,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:24,197 INFO L225 Difference]: With dead ends: 66 [2019-10-22 08:57:24,199 INFO L226 Difference]: Without dead ends: 32 [2019-10-22 08:57:24,202 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 [2019-10-22 08:57:24,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-22 08:57:24,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-22 08:57:24,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-22 08:57:24,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2019-10-22 08:57:24,238 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 17 [2019-10-22 08:57:24,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:24,239 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2019-10-22 08:57:24,239 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 08:57:24,239 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2019-10-22 08:57:24,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-22 08:57:24,240 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:24,240 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:24,240 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:24,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:24,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1179538664, now seen corresponding path program 1 times [2019-10-22 08:57:24,240 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:24,241 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823870830] [2019-10-22 08:57:24,241 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:24,241 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:24,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:24,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:24,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:24,365 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823870830] [2019-10-22 08:57:24,366 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:24,366 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-22 08:57:24,366 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061288127] [2019-10-22 08:57:24,367 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 08:57:24,367 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:24,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 08:57:24,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:57:24,368 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand 4 states. [2019-10-22 08:57:24,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:24,415 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2019-10-22 08:57:24,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:57:24,415 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-10-22 08:57:24,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:24,416 INFO L225 Difference]: With dead ends: 41 [2019-10-22 08:57:24,416 INFO L226 Difference]: Without dead ends: 39 [2019-10-22 08:57:24,418 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-22 08:57:24,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-22 08:57:24,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2019-10-22 08:57:24,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-22 08:57:24,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2019-10-22 08:57:24,425 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 17 [2019-10-22 08:57:24,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:24,426 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2019-10-22 08:57:24,426 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 08:57:24,426 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2019-10-22 08:57:24,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-22 08:57:24,427 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:24,427 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:24,427 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:24,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:24,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1179598246, now seen corresponding path program 1 times [2019-10-22 08:57:24,429 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:24,429 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974857023] [2019-10-22 08:57:24,430 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:24,430 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:24,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:24,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:24,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:24,595 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974857023] [2019-10-22 08:57:24,595 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:24,595 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-22 08:57:24,595 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266058251] [2019-10-22 08:57:24,596 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 08:57:24,596 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:24,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 08:57:24,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:57:24,597 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 4 states. [2019-10-22 08:57:24,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:24,680 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2019-10-22 08:57:24,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 08:57:24,680 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-10-22 08:57:24,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:24,681 INFO L225 Difference]: With dead ends: 64 [2019-10-22 08:57:24,681 INFO L226 Difference]: Without dead ends: 38 [2019-10-22 08:57:24,682 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:57:24,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-22 08:57:24,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2019-10-22 08:57:24,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-22 08:57:24,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2019-10-22 08:57:24,686 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 17 [2019-10-22 08:57:24,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:24,686 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2019-10-22 08:57:24,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 08:57:24,687 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2019-10-22 08:57:24,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-22 08:57:24,687 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:24,687 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:24,687 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:24,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:24,688 INFO L82 PathProgramCache]: Analyzing trace with hash -130988767, now seen corresponding path program 1 times [2019-10-22 08:57:24,688 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:24,688 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058700250] [2019-10-22 08:57:24,688 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:24,688 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:24,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:24,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:24,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:24,789 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058700250] [2019-10-22 08:57:24,789 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239364079] [2019-10-22 08:57:24,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_824d6934-7bd6-4536-9fca-a600712fca25/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 [2019-10-22 08:57:24,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:24,853 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 08:57:24,858 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:24,882 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:57:24,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:24,928 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:57:24,929 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-10-22 08:57:24,929 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545610510] [2019-10-22 08:57:24,929 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-22 08:57:24,929 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:24,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 08:57:24,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-22 08:57:24,930 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand 8 states. [2019-10-22 08:57:25,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:25,123 INFO L93 Difference]: Finished difference Result 81 states and 103 transitions. [2019-10-22 08:57:25,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 08:57:25,124 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2019-10-22 08:57:25,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:25,125 INFO L225 Difference]: With dead ends: 81 [2019-10-22 08:57:25,125 INFO L226 Difference]: Without dead ends: 60 [2019-10-22 08:57:25,126 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-22 08:57:25,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-22 08:57:25,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 38. [2019-10-22 08:57:25,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-22 08:57:25,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2019-10-22 08:57:25,136 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 21 [2019-10-22 08:57:25,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:25,136 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2019-10-22 08:57:25,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-22 08:57:25,137 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2019-10-22 08:57:25,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-22 08:57:25,137 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:25,137 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:25,338 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:57:25,338 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:25,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:25,339 INFO L82 PathProgramCache]: Analyzing trace with hash 956146768, now seen corresponding path program 1 times [2019-10-22 08:57:25,339 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:25,339 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741572104] [2019-10-22 08:57:25,339 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:25,339 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:25,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:25,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:25,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-22 08:57:25,411 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741572104] [2019-10-22 08:57:25,412 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:25,412 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 08:57:25,412 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848386761] [2019-10-22 08:57:25,412 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 08:57:25,413 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:25,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 08:57:25,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 08:57:25,413 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 3 states. [2019-10-22 08:57:25,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:25,430 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2019-10-22 08:57:25,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 08:57:25,431 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2019-10-22 08:57:25,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:25,432 INFO L225 Difference]: With dead ends: 59 [2019-10-22 08:57:25,432 INFO L226 Difference]: Without dead ends: 38 [2019-10-22 08:57:25,432 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 [2019-10-22 08:57:25,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-22 08:57:25,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-10-22 08:57:25,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-22 08:57:25,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2019-10-22 08:57:25,441 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 33 [2019-10-22 08:57:25,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:25,441 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2019-10-22 08:57:25,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 08:57:25,441 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2019-10-22 08:57:25,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-22 08:57:25,442 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:25,442 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:25,442 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:25,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:25,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1977215122, now seen corresponding path program 1 times [2019-10-22 08:57:25,443 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:25,443 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562993707] [2019-10-22 08:57:25,443 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:25,443 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:25,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:25,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:25,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-22 08:57:25,510 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562993707] [2019-10-22 08:57:25,510 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:25,510 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 08:57:25,511 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465353665] [2019-10-22 08:57:25,511 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 08:57:25,511 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:25,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 08:57:25,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 08:57:25,512 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 3 states. [2019-10-22 08:57:25,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:25,544 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2019-10-22 08:57:25,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 08:57:25,546 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2019-10-22 08:57:25,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:25,546 INFO L225 Difference]: With dead ends: 53 [2019-10-22 08:57:25,546 INFO L226 Difference]: Without dead ends: 38 [2019-10-22 08:57:25,547 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 [2019-10-22 08:57:25,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-22 08:57:25,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-10-22 08:57:25,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-22 08:57:25,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2019-10-22 08:57:25,552 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 33 [2019-10-22 08:57:25,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:25,553 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2019-10-22 08:57:25,553 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 08:57:25,553 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2019-10-22 08:57:25,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-22 08:57:25,553 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:25,554 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:25,554 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:25,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:25,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1584188112, now seen corresponding path program 1 times [2019-10-22 08:57:25,554 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:25,554 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943350945] [2019-10-22 08:57:25,555 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:25,555 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:25,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:25,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:26,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:26,920 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943350945] [2019-10-22 08:57:26,921 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516975822] [2019-10-22 08:57:26,921 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_824d6934-7bd6-4536-9fca-a600712fca25/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 [2019-10-22 08:57:26,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:26,960 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-22 08:57:26,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:27,039 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 16 treesize of output 12 [2019-10-22 08:57:27,041 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 08:57:27,051 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 08:57:27,052 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-22 08:57:27,052 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2019-10-22 08:57:27,286 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:57:27,286 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.NullPointerException 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$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.MultiDimensionalNestedStore.getInnermost(MultiDimensionalNestedStore.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:277) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive$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$ArrOccFinder.(ArrayOccurrenceAnalysis.java:181) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.(ArrayOccurrenceAnalysis.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.downgradeDimensionsIfNecessary(ArrayOccurrenceAnalysis.java:171) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.computeCostEstimation(ArrayIndexBasedCostEstimation.java:132) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.(ArrayIndexBasedCostEstimation.java:64) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:519) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:390) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer$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 [2019-10-22 08:57:27,291 INFO L168 Benchmark]: Toolchain (without parser) took 4218.87 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 212.9 MB). Free memory was 942.0 MB in the beginning and 1.1 GB in the end (delta: -198.8 MB). Peak memory consumption was 14.1 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:27,291 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 966.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:57:27,292 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.54 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.2 MB). Free memory was 942.0 MB in the beginning and 1.1 GB in the end (delta: -195.0 MB). Peak memory consumption was 20.7 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:27,292 INFO L168 Benchmark]: Boogie Procedure Inliner took 73.73 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. [2019-10-22 08:57:27,293 INFO L168 Benchmark]: Boogie Preprocessor took 55.74 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: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:27,293 INFO L168 Benchmark]: RCFGBuilder took 421.48 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: 27.4 MB). Peak memory consumption was 27.4 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:27,294 INFO L168 Benchmark]: TraceAbstraction took 3384.99 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 67.6 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -34.6 MB). Peak memory consumption was 33.1 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:27,296 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 966.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 279.54 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.2 MB). Free memory was 942.0 MB in the beginning and 1.1 GB in the end (delta: -195.0 MB). Peak memory consumption was 20.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 73.73 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 55.74 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: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 421.48 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: 27.4 MB). Peak memory consumption was 27.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3384.99 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 67.6 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -34.6 MB). Peak memory consumption was 33.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.NullPointerException de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.NullPointerException: 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 [2019-10-22 08:57:29,291 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 08:57:29,292 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 08:57:29,301 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 08:57:29,302 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 08:57:29,302 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 08:57:29,303 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 08:57:29,305 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 08:57:29,306 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 08:57:29,307 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 08:57:29,308 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 08:57:29,309 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 08:57:29,309 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 08:57:29,310 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 08:57:29,311 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 08:57:29,311 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 08:57:29,312 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 08:57:29,313 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 08:57:29,314 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 08:57:29,316 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 08:57:29,317 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 08:57:29,318 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 08:57:29,319 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 08:57:29,320 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 08:57:29,321 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 08:57:29,322 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 08:57:29,322 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 08:57:29,323 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 08:57:29,323 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 08:57:29,324 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 08:57:29,324 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 08:57:29,325 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 08:57:29,325 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 08:57:29,326 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 08:57:29,327 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 08:57:29,327 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 08:57:29,327 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 08:57:29,328 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 08:57:29,328 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 08:57:29,329 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 08:57:29,329 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 08:57:29,330 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_824d6934-7bd6-4536-9fca-a600712fca25/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-10-22 08:57:29,341 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 08:57:29,341 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 08:57:29,342 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 08:57:29,343 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 08:57:29,343 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 08:57:29,343 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 08:57:29,343 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 08:57:29,343 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 08:57:29,343 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 08:57:29,344 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 08:57:29,344 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 08:57:29,344 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 08:57:29,344 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-10-22 08:57:29,344 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-10-22 08:57:29,344 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 08:57:29,344 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 08:57:29,344 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 08:57:29,345 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 08:57:29,345 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 08:57:29,345 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 08:57:29,345 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 08:57:29,345 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 08:57:29,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:57:29,346 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 08:57:29,346 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 08:57:29,346 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 08:57:29,346 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-10-22 08:57:29,347 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-10-22 08:57:29,347 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 08:57:29,347 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 08:57:29,347 INFO L138 SettingsManager]: * Logic for external solver=AUFBV Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_824d6934-7bd6-4536-9fca-a600712fca25/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 -> 162af48526beed8ce59715aaad1198a79a3197bf [2019-10-22 08:57:29,373 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 08:57:29,383 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 08:57:29,386 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 08:57:29,387 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 08:57:29,388 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 08:57:29,388 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_824d6934-7bd6-4536-9fca-a600712fca25/bin/uautomizer/../../sv-benchmarks/c/array-tiling/mbpr4.c [2019-10-22 08:57:29,441 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_824d6934-7bd6-4536-9fca-a600712fca25/bin/uautomizer/data/ae4b8d2e9/a892ee406b364c42a1d21dde37e75e55/FLAG809955d4a [2019-10-22 08:57:29,841 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 08:57:29,842 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_824d6934-7bd6-4536-9fca-a600712fca25/sv-benchmarks/c/array-tiling/mbpr4.c [2019-10-22 08:57:29,850 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_824d6934-7bd6-4536-9fca-a600712fca25/bin/uautomizer/data/ae4b8d2e9/a892ee406b364c42a1d21dde37e75e55/FLAG809955d4a [2019-10-22 08:57:29,860 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_824d6934-7bd6-4536-9fca-a600712fca25/bin/uautomizer/data/ae4b8d2e9/a892ee406b364c42a1d21dde37e75e55 [2019-10-22 08:57:29,862 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 08:57:29,864 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 08:57:29,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 08:57:29,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 08:57:29,867 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 08:57:29,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:57:29" (1/1) ... [2019-10-22 08:57:29,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@313b155 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:29, skipping insertion in model container [2019-10-22 08:57:29,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:57:29" (1/1) ... [2019-10-22 08:57:29,877 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 08:57:29,893 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 08:57:30,062 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:57:30,072 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 08:57:30,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:57:30,155 INFO L192 MainTranslator]: Completed translation [2019-10-22 08:57:30,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:30 WrapperNode [2019-10-22 08:57:30,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 08:57:30,156 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 08:57:30,156 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 08:57:30,156 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 08:57:30,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:30" (1/1) ... [2019-10-22 08:57:30,234 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:30" (1/1) ... [2019-10-22 08:57:30,267 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 08:57:30,267 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 08:57:30,267 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 08:57:30,267 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 08:57:30,276 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:30" (1/1) ... [2019-10-22 08:57:30,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:30" (1/1) ... [2019-10-22 08:57:30,280 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:30" (1/1) ... [2019-10-22 08:57:30,280 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:30" (1/1) ... [2019-10-22 08:57:30,291 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:30" (1/1) ... [2019-10-22 08:57:30,295 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:30" (1/1) ... [2019-10-22 08:57:30,297 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:30" (1/1) ... [2019-10-22 08:57:30,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 08:57:30,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 08:57:30,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 08:57:30,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 08:57:30,301 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:30" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_824d6934-7bd6-4536-9fca-a600712fca25/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 [2019-10-22 08:57:30,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-10-22 08:57:30,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 08:57:30,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 08:57:30,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-22 08:57:30,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-10-22 08:57:30,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 08:57:30,796 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 08:57:30,796 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-10-22 08:57:30,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:57:30 BoogieIcfgContainer [2019-10-22 08:57:30,798 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 08:57:30,799 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 08:57:30,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 08:57:30,801 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 08:57:30,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 08:57:29" (1/3) ... [2019-10-22 08:57:30,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@581da45d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:57:30, skipping insertion in model container [2019-10-22 08:57:30,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:30" (2/3) ... [2019-10-22 08:57:30,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@581da45d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:57:30, skipping insertion in model container [2019-10-22 08:57:30,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:57:30" (3/3) ... [2019-10-22 08:57:30,805 INFO L109 eAbstractionObserver]: Analyzing ICFG mbpr4.c [2019-10-22 08:57:30,812 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 08:57:30,819 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 08:57:30,830 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 08:57:30,853 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 08:57:30,853 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 08:57:30,853 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 08:57:30,853 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 08:57:30,853 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 08:57:30,853 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 08:57:30,854 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 08:57:30,854 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 08:57:30,866 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2019-10-22 08:57:30,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-22 08:57:30,872 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:30,873 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:30,875 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:30,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:30,881 INFO L82 PathProgramCache]: Analyzing trace with hash 219549199, now seen corresponding path program 1 times [2019-10-22 08:57:30,889 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:57:30,889 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2040143730] [2019-10-22 08:57:30,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_824d6934-7bd6-4536-9fca-a600712fca25/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 [2019-10-22 08:57:30,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:30,967 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-22 08:57:30,971 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:30,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:30,985 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:57:30,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:30,990 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2040143730] [2019-10-22 08:57:30,991 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:30,991 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-10-22 08:57:30,991 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623017097] [2019-10-22 08:57:30,995 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 08:57:30,995 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:57:31,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 08:57:31,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 08:57:31,010 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 2 states. [2019-10-22 08:57:31,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:31,026 INFO L93 Difference]: Finished difference Result 66 states and 95 transitions. [2019-10-22 08:57:31,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 08:57:31,027 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-10-22 08:57:31,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:31,036 INFO L225 Difference]: With dead ends: 66 [2019-10-22 08:57:31,037 INFO L226 Difference]: Without dead ends: 32 [2019-10-22 08:57:31,039 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 08:57:31,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-22 08:57:31,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-22 08:57:31,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-22 08:57:31,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2019-10-22 08:57:31,075 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 17 [2019-10-22 08:57:31,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:31,076 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2019-10-22 08:57:31,076 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 08:57:31,076 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2019-10-22 08:57:31,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-22 08:57:31,076 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:31,077 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:31,277 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 08:57:31,278 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:31,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:31,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1179538664, now seen corresponding path program 1 times [2019-10-22 08:57:31,278 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:57:31,279 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2129079030] [2019-10-22 08:57:31,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_824d6934-7bd6-4536-9fca-a600712fca25/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 [2019-10-22 08:57:31,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:31,336 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 08:57:31,338 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:31,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:31,378 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:57:31,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:31,397 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2129079030] [2019-10-22 08:57:31,397 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:31,397 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2019-10-22 08:57:31,397 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923661878] [2019-10-22 08:57:31,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 08:57:31,402 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:57:31,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 08:57:31,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-22 08:57:31,403 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand 5 states. [2019-10-22 08:57:31,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:31,499 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2019-10-22 08:57:31,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 08:57:31,500 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2019-10-22 08:57:31,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:31,501 INFO L225 Difference]: With dead ends: 46 [2019-10-22 08:57:31,501 INFO L226 Difference]: Without dead ends: 44 [2019-10-22 08:57:31,502 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-22 08:57:31,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-22 08:57:31,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2019-10-22 08:57:31,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-22 08:57:31,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2019-10-22 08:57:31,508 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 17 [2019-10-22 08:57:31,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:31,509 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2019-10-22 08:57:31,509 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 08:57:31,509 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2019-10-22 08:57:31,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-22 08:57:31,510 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:31,510 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:31,711 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 08:57:31,711 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:31,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:31,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1179598246, now seen corresponding path program 1 times [2019-10-22 08:57:31,712 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:57:31,713 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1977320925] [2019-10-22 08:57:31,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_824d6934-7bd6-4536-9fca-a600712fca25/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 [2019-10-22 08:57:31,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:31,811 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-22 08:57:31,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:31,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:31,846 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:57:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:32,117 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1977320925] [2019-10-22 08:57:32,117 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:32,118 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-22 08:57:32,118 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755051020] [2019-10-22 08:57:32,118 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 08:57:32,118 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:57:32,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 08:57:32,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-22 08:57:32,119 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 6 states. [2019-10-22 08:57:32,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:32,872 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2019-10-22 08:57:32,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:57:32,877 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-10-22 08:57:32,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:32,878 INFO L225 Difference]: With dead ends: 74 [2019-10-22 08:57:32,878 INFO L226 Difference]: Without dead ends: 48 [2019-10-22 08:57:32,879 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-10-22 08:57:32,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-22 08:57:32,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 35. [2019-10-22 08:57:32,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-22 08:57:32,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2019-10-22 08:57:32,883 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 17 [2019-10-22 08:57:32,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:32,883 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2019-10-22 08:57:32,883 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 08:57:32,883 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2019-10-22 08:57:32,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-22 08:57:32,884 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:32,884 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:33,085 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 08:57:33,085 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:33,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:33,085 INFO L82 PathProgramCache]: Analyzing trace with hash -130988767, now seen corresponding path program 1 times [2019-10-22 08:57:33,086 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:57:33,086 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1830878580] [2019-10-22 08:57:33,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_824d6934-7bd6-4536-9fca-a600712fca25/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 [2019-10-22 08:57:33,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:33,165 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 08:57:33,166 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:33,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:33,761 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:57:34,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:34,797 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1830878580] [2019-10-22 08:57:34,797 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:57:34,797 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-10-22 08:57:34,798 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293576424] [2019-10-22 08:57:34,798 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-22 08:57:34,798 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:57:34,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-22 08:57:34,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-10-22 08:57:34,799 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand 12 states. [2019-10-22 08:57:35,224 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 14 [2019-10-22 08:57:35,438 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 10 [2019-10-22 08:57:35,932 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2019-10-22 08:57:36,391 WARN L191 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2019-10-22 08:57:45,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:45,237 INFO L93 Difference]: Finished difference Result 156 states and 207 transitions. [2019-10-22 08:57:45,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-22 08:57:45,243 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2019-10-22 08:57:45,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:45,244 INFO L225 Difference]: With dead ends: 156 [2019-10-22 08:57:45,245 INFO L226 Difference]: Without dead ends: 131 [2019-10-22 08:57:45,245 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2019-10-22 08:57:45,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-10-22 08:57:45,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 68. [2019-10-22 08:57:45,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-22 08:57:45,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2019-10-22 08:57:45,265 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 21 [2019-10-22 08:57:45,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:45,265 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2019-10-22 08:57:45,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-22 08:57:45,265 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2019-10-22 08:57:45,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-22 08:57:45,266 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:45,266 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:45,467 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 08:57:45,467 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:45,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:45,468 INFO L82 PathProgramCache]: Analyzing trace with hash 956146768, now seen corresponding path program 1 times [2019-10-22 08:57:45,468 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:57:45,468 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [392217220] [2019-10-22 08:57:45,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_824d6934-7bd6-4536-9fca-a600712fca25/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 [2019-10-22 08:57:45,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:45,566 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 08:57:45,567 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:45,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-22 08:57:45,579 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:57:45,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-22 08:57:45,598 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [392217220] [2019-10-22 08:57:45,598 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:45,598 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-10-22 08:57:45,600 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972953343] [2019-10-22 08:57:45,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 08:57:45,600 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:57:45,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 08:57:45,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:57:45,601 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand 4 states. [2019-10-22 08:57:45,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:45,637 INFO L93 Difference]: Finished difference Result 101 states and 126 transitions. [2019-10-22 08:57:45,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 08:57:45,638 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2019-10-22 08:57:45,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:45,639 INFO L225 Difference]: With dead ends: 101 [2019-10-22 08:57:45,639 INFO L226 Difference]: Without dead ends: 68 [2019-10-22 08:57:45,640 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:57:45,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-22 08:57:45,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-10-22 08:57:45,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-22 08:57:45,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2019-10-22 08:57:45,650 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 33 [2019-10-22 08:57:45,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:45,650 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2019-10-22 08:57:45,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 08:57:45,650 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2019-10-22 08:57:45,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-22 08:57:45,651 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:45,651 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:45,852 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 08:57:45,852 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:45,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:45,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1977215122, now seen corresponding path program 1 times [2019-10-22 08:57:45,853 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:57:45,853 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1124086191] [2019-10-22 08:57:45,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_824d6934-7bd6-4536-9fca-a600712fca25/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 [2019-10-22 08:57:45,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:45,936 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 08:57:45,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:45,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-22 08:57:45,949 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:57:45,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-22 08:57:45,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1124086191] [2019-10-22 08:57:45,963 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:45,963 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-10-22 08:57:45,963 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461265098] [2019-10-22 08:57:45,964 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 08:57:45,964 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:57:45,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 08:57:45,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:57:45,964 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand 4 states. [2019-10-22 08:57:45,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:45,995 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2019-10-22 08:57:45,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 08:57:45,996 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2019-10-22 08:57:45,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:45,997 INFO L225 Difference]: With dead ends: 86 [2019-10-22 08:57:45,997 INFO L226 Difference]: Without dead ends: 68 [2019-10-22 08:57:45,997 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:57:45,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-22 08:57:46,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-10-22 08:57:46,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-22 08:57:46,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 81 transitions. [2019-10-22 08:57:46,007 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 81 transitions. Word has length 33 [2019-10-22 08:57:46,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:46,007 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 81 transitions. [2019-10-22 08:57:46,008 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 08:57:46,008 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 81 transitions. [2019-10-22 08:57:46,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-22 08:57:46,008 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:46,009 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:46,209 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 08:57:46,209 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:46,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:46,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1584188112, now seen corresponding path program 1 times [2019-10-22 08:57:46,210 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:57:46,210 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [192524239] [2019-10-22 08:57:46,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_824d6934-7bd6-4536-9fca-a600712fca25/bin/uautomizer/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 08:57:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:46,337 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-22 08:57:46,339 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:46,382 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 16 treesize of output 12 [2019-10-22 08:57:46,382 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 08:57:46,394 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 08:57:46,394 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-22 08:57:46,395 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2019-10-22 08:57:46,616 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 08:57:46,617 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.MultiDimensionalNestedStore.getInnermost(MultiDimensionalNestedStore.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:277) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive$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$ArrOccFinder.(ArrayOccurrenceAnalysis.java:181) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.(ArrayOccurrenceAnalysis.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.downgradeDimensionsIfNecessary(ArrayOccurrenceAnalysis.java:171) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.computeCostEstimation(ArrayIndexBasedCostEstimation.java:132) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.(ArrayIndexBasedCostEstimation.java:64) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:519) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:390) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer$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) [2019-10-22 08:57:46,621 INFO L168 Benchmark]: Toolchain (without parser) took 16757.58 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.3 MB). Free memory was 947.0 MB in the beginning and 878.3 MB in the end (delta: 68.6 MB). Peak memory consumption was 227.0 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:46,621 INFO L168 Benchmark]: CDTParser took 0.18 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. [2019-10-22 08:57:46,622 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.34 ms. Allocated memory is still 1.0 GB. Free memory was 947.0 MB in the beginning and 930.9 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:46,623 INFO L168 Benchmark]: Boogie Procedure Inliner took 110.72 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.3 MB). Free memory was 930.9 MB in the beginning and 1.1 GB in the end (delta: -215.9 MB). Peak memory consumption was 13.0 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:46,623 INFO L168 Benchmark]: Boogie Preprocessor took 32.97 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. [2019-10-22 08:57:46,623 INFO L168 Benchmark]: RCFGBuilder took 497.64 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: 26.3 MB). Peak memory consumption was 26.3 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:46,624 INFO L168 Benchmark]: TraceAbstraction took 15821.36 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 878.3 MB in the end (delta: 242.1 MB). Peak memory consumption was 242.1 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:46,626 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 972.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 291.34 ms. Allocated memory is still 1.0 GB. Free memory was 947.0 MB in the beginning and 930.9 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 110.72 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.3 MB). Free memory was 930.9 MB in the beginning and 1.1 GB in the end (delta: -215.9 MB). Peak memory consumption was 13.0 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 32.97 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 497.64 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: 26.3 MB). Peak memory consumption was 26.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 15821.36 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 878.3 MB in the end (delta: 242.1 MB). Peak memory consumption was 242.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.MultiDimensionalNestedStore.getInnermost(MultiDimensionalNestedStore.java:121) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...