./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/sep.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/sep.i -s /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/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 e150e83dea41703782a488455769a24bf6c8f600 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/sep.i -s /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/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 e150e83dea41703782a488455769a24bf6c8f600 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 17:28:00,216 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 17:28:00,217 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 17:28:00,225 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 17:28:00,225 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 17:28:00,225 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 17:28:00,226 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 17:28:00,228 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 17:28:00,229 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 17:28:00,229 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 17:28:00,230 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 17:28:00,231 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 17:28:00,231 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 17:28:00,232 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 17:28:00,232 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 17:28:00,233 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 17:28:00,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 17:28:00,234 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 17:28:00,235 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 17:28:00,237 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 17:28:00,238 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 17:28:00,239 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 17:28:00,239 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 17:28:00,240 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 17:28:00,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 17:28:00,242 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 17:28:00,242 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 17:28:00,242 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 17:28:00,242 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 17:28:00,243 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 17:28:00,243 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 17:28:00,244 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 17:28:00,244 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 17:28:00,244 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 17:28:00,245 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 17:28:00,245 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 17:28:00,245 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 17:28:00,246 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 17:28:00,246 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 17:28:00,246 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 17:28:00,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 17:28:00,247 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 17:28:00,257 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 17:28:00,257 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 17:28:00,258 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 17:28:00,258 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 17:28:00,258 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 17:28:00,258 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 17:28:00,258 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 17:28:00,258 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 17:28:00,258 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 17:28:00,259 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 17:28:00,259 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 17:28:00,259 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 17:28:00,259 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 17:28:00,259 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 17:28:00,259 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 17:28:00,259 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 17:28:00,259 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 17:28:00,260 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 17:28:00,260 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 17:28:00,260 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 17:28:00,260 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 17:28:00,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 17:28:00,260 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 17:28:00,260 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 17:28:00,260 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 17:28:00,261 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 17:28:00,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 17:28:00,261 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 17:28:00,261 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 17:28:00,261 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/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 -> e150e83dea41703782a488455769a24bf6c8f600 [2019-12-07 17:28:00,361 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 17:28:00,371 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 17:28:00,374 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 17:28:00,375 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 17:28:00,375 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 17:28:00,376 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/bin/uautomizer/../../sv-benchmarks/c/reducercommutativity/sep.i [2019-12-07 17:28:00,420 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/bin/uautomizer/data/d45ff233b/9afc08c70883496ea5eb130c7f6c6924/FLAG8fc371840 [2019-12-07 17:28:00,837 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 17:28:00,838 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/sv-benchmarks/c/reducercommutativity/sep.i [2019-12-07 17:28:00,841 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/bin/uautomizer/data/d45ff233b/9afc08c70883496ea5eb130c7f6c6924/FLAG8fc371840 [2019-12-07 17:28:00,850 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/bin/uautomizer/data/d45ff233b/9afc08c70883496ea5eb130c7f6c6924 [2019-12-07 17:28:00,852 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 17:28:00,853 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 17:28:00,853 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 17:28:00,854 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 17:28:00,856 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 17:28:00,856 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 05:28:00" (1/1) ... [2019-12-07 17:28:00,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@119a7e8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:28:00, skipping insertion in model container [2019-12-07 17:28:00,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 05:28:00" (1/1) ... [2019-12-07 17:28:00,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 17:28:00,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 17:28:01,009 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 17:28:01,015 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 17:28:01,029 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 17:28:01,038 INFO L208 MainTranslator]: Completed translation [2019-12-07 17:28:01,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:28:01 WrapperNode [2019-12-07 17:28:01,039 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 17:28:01,039 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 17:28:01,039 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 17:28:01,039 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 17:28:01,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:28:01" (1/1) ... [2019-12-07 17:28:01,050 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:28:01" (1/1) ... [2019-12-07 17:28:01,066 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 17:28:01,067 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 17:28:01,067 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 17:28:01,067 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 17:28:01,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:28:01" (1/1) ... [2019-12-07 17:28:01,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:28:01" (1/1) ... [2019-12-07 17:28:01,075 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:28:01" (1/1) ... [2019-12-07 17:28:01,075 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:28:01" (1/1) ... [2019-12-07 17:28:01,079 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:28:01" (1/1) ... [2019-12-07 17:28:01,082 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:28:01" (1/1) ... [2019-12-07 17:28:01,084 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:28:01" (1/1) ... [2019-12-07 17:28:01,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 17:28:01,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 17:28:01,086 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 17:28:01,086 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 17:28:01,086 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:28:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/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 [2019-12-07 17:28:01,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 17:28:01,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 17:28:01,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 17:28:01,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 17:28:01,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 17:28:01,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 17:28:01,293 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 17:28:01,293 INFO L287 CfgBuilder]: Removed 14 assume(true) statements. [2019-12-07 17:28:01,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:28:01 BoogieIcfgContainer [2019-12-07 17:28:01,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 17:28:01,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 17:28:01,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 17:28:01,297 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 17:28:01,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 05:28:00" (1/3) ... [2019-12-07 17:28:01,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61629309 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 05:28:01, skipping insertion in model container [2019-12-07 17:28:01,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:28:01" (2/3) ... [2019-12-07 17:28:01,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61629309 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 05:28:01, skipping insertion in model container [2019-12-07 17:28:01,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:28:01" (3/3) ... [2019-12-07 17:28:01,299 INFO L109 eAbstractionObserver]: Analyzing ICFG sep.i [2019-12-07 17:28:01,305 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 17:28:01,309 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 17:28:01,317 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 17:28:01,331 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 17:28:01,331 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 17:28:01,332 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 17:28:01,332 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 17:28:01,332 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 17:28:01,332 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 17:28:01,332 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 17:28:01,332 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 17:28:01,342 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-12-07 17:28:01,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 17:28:01,346 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:28:01,346 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:28:01,346 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:28:01,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:28:01,350 INFO L82 PathProgramCache]: Analyzing trace with hash -805411982, now seen corresponding path program 1 times [2019-12-07 17:28:01,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:28:01,356 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464926048] [2019-12-07 17:28:01,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:28:01,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:28:01,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:28:01,440 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464926048] [2019-12-07 17:28:01,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:28:01,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 17:28:01,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168489321] [2019-12-07 17:28:01,444 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 17:28:01,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:28:01,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 17:28:01,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 17:28:01,454 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2019-12-07 17:28:01,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:28:01,466 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2019-12-07 17:28:01,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 17:28:01,467 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2019-12-07 17:28:01,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:28:01,473 INFO L225 Difference]: With dead ends: 52 [2019-12-07 17:28:01,473 INFO L226 Difference]: Without dead ends: 24 [2019-12-07 17:28:01,475 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 17:28:01,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-12-07 17:28:01,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-12-07 17:28:01,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-12-07 17:28:01,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2019-12-07 17:28:01,497 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 16 [2019-12-07 17:28:01,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:28:01,497 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2019-12-07 17:28:01,497 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 17:28:01,497 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2019-12-07 17:28:01,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 17:28:01,498 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:28:01,498 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:28:01,498 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:28:01,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:28:01,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1872946201, now seen corresponding path program 1 times [2019-12-07 17:28:01,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:28:01,499 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759326647] [2019-12-07 17:28:01,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:28:01,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:28:01,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:28:01,555 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759326647] [2019-12-07 17:28:01,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:28:01,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 17:28:01,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077369930] [2019-12-07 17:28:01,557 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 17:28:01,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:28:01,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 17:28:01,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 17:28:01,557 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand 3 states. [2019-12-07 17:28:01,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:28:01,591 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2019-12-07 17:28:01,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 17:28:01,592 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-12-07 17:28:01,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:28:01,592 INFO L225 Difference]: With dead ends: 45 [2019-12-07 17:28:01,592 INFO L226 Difference]: Without dead ends: 27 [2019-12-07 17:28:01,593 INFO L630 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 [2019-12-07 17:28:01,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-12-07 17:28:01,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2019-12-07 17:28:01,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-12-07 17:28:01,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2019-12-07 17:28:01,597 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 16 [2019-12-07 17:28:01,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:28:01,597 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2019-12-07 17:28:01,597 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 17:28:01,597 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2019-12-07 17:28:01,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-07 17:28:01,598 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:28:01,598 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:28:01,598 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:28:01,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:28:01,598 INFO L82 PathProgramCache]: Analyzing trace with hash -567209286, now seen corresponding path program 1 times [2019-12-07 17:28:01,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:28:01,599 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386054711] [2019-12-07 17:28:01,599 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:28:01,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:28:01,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 17:28:01,644 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386054711] [2019-12-07 17:28:01,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:28:01,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 17:28:01,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212241805] [2019-12-07 17:28:01,645 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 17:28:01,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:28:01,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 17:28:01,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 17:28:01,645 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 4 states. [2019-12-07 17:28:01,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:28:01,680 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2019-12-07 17:28:01,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 17:28:01,680 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-12-07 17:28:01,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:28:01,681 INFO L225 Difference]: With dead ends: 46 [2019-12-07 17:28:01,681 INFO L226 Difference]: Without dead ends: 33 [2019-12-07 17:28:01,681 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 17:28:01,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-12-07 17:28:01,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2019-12-07 17:28:01,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-12-07 17:28:01,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2019-12-07 17:28:01,685 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 19 [2019-12-07 17:28:01,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:28:01,685 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2019-12-07 17:28:01,685 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 17:28:01,686 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2019-12-07 17:28:01,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-12-07 17:28:01,686 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:28:01,686 INFO L410 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] [2019-12-07 17:28:01,686 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:28:01,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:28:01,687 INFO L82 PathProgramCache]: Analyzing trace with hash -2050984225, now seen corresponding path program 1 times [2019-12-07 17:28:01,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:28:01,687 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127945407] [2019-12-07 17:28:01,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:28:01,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:28:01,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-07 17:28:01,743 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127945407] [2019-12-07 17:28:01,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:28:01,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 17:28:01,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769060791] [2019-12-07 17:28:01,744 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 17:28:01,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:28:01,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 17:28:01,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 17:28:01,744 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 4 states. [2019-12-07 17:28:01,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:28:01,770 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2019-12-07 17:28:01,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 17:28:01,770 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-12-07 17:28:01,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:28:01,771 INFO L225 Difference]: With dead ends: 39 [2019-12-07 17:28:01,771 INFO L226 Difference]: Without dead ends: 29 [2019-12-07 17:28:01,771 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 17:28:01,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-07 17:28:01,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-12-07 17:28:01,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-07 17:28:01,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-12-07 17:28:01,774 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 25 [2019-12-07 17:28:01,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:28:01,775 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-12-07 17:28:01,775 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 17:28:01,775 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2019-12-07 17:28:01,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-07 17:28:01,775 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:28:01,775 INFO L410 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] [2019-12-07 17:28:01,775 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:28:01,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:28:01,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1500824769, now seen corresponding path program 1 times [2019-12-07 17:28:01,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:28:01,776 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659498827] [2019-12-07 17:28:01,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:28:01,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:28:01,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-07 17:28:01,822 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659498827] [2019-12-07 17:28:01,823 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985380323] [2019-12-07 17:28:01,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/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 [2019-12-07 17:28:01,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:28:01,870 INFO L264 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 17:28:01,874 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:28:01,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-07 17:28:01,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:28:01,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-12-07 17:28:01,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855556219] [2019-12-07 17:28:01,901 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 17:28:01,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:28:01,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 17:28:01,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-12-07 17:28:01,902 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 6 states. [2019-12-07 17:28:01,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:28:01,938 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2019-12-07 17:28:01,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 17:28:01,938 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2019-12-07 17:28:01,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:28:01,939 INFO L225 Difference]: With dead ends: 54 [2019-12-07 17:28:01,939 INFO L226 Difference]: Without dead ends: 33 [2019-12-07 17:28:01,939 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-12-07 17:28:01,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-12-07 17:28:01,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2019-12-07 17:28:01,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-12-07 17:28:01,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2019-12-07 17:28:01,942 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 27 [2019-12-07 17:28:01,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:28:01,943 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2019-12-07 17:28:01,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 17:28:01,943 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2019-12-07 17:28:01,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-12-07 17:28:01,943 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:28:01,943 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:28:02,144 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:28:02,144 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:28:02,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:28:02,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1175870478, now seen corresponding path program 2 times [2019-12-07 17:28:02,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:28:02,146 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868142490] [2019-12-07 17:28:02,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:28:02,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:28:02,253 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 17:28:02,254 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868142490] [2019-12-07 17:28:02,254 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29840870] [2019-12-07 17:28:02,255 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/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 [2019-12-07 17:28:02,310 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 17:28:02,310 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:28:02,310 INFO L264 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 17:28:02,312 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:28:02,330 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 17:28:02,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:28:02,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2019-12-07 17:28:02,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558687821] [2019-12-07 17:28:02,331 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 17:28:02,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:28:02,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 17:28:02,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2019-12-07 17:28:02,331 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 7 states. [2019-12-07 17:28:02,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:28:02,383 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2019-12-07 17:28:02,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 17:28:02,383 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2019-12-07 17:28:02,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:28:02,384 INFO L225 Difference]: With dead ends: 58 [2019-12-07 17:28:02,384 INFO L226 Difference]: Without dead ends: 43 [2019-12-07 17:28:02,384 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2019-12-07 17:28:02,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-12-07 17:28:02,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2019-12-07 17:28:02,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-12-07 17:28:02,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2019-12-07 17:28:02,388 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 30 [2019-12-07 17:28:02,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:28:02,388 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2019-12-07 17:28:02,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 17:28:02,388 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2019-12-07 17:28:02,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-07 17:28:02,389 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:28:02,389 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:28:02,590 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:28:02,590 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:28:02,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:28:02,590 INFO L82 PathProgramCache]: Analyzing trace with hash 657704709, now seen corresponding path program 3 times [2019-12-07 17:28:02,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:28:02,591 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301345499] [2019-12-07 17:28:02,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:28:02,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:28:03,065 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 17:28:03,066 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301345499] [2019-12-07 17:28:03,066 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581787363] [2019-12-07 17:28:03,066 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:28:03,116 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-07 17:28:03,116 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:28:03,118 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 31 conjunts are in the unsatisfiable core [2019-12-07 17:28:03,120 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:28:03,128 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:28:03,177 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:28:03,267 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:28:19,688 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2019-12-07 17:28:19,688 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") [2019-12-07 17:28:19,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 17:28:19,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-12-07 17:28:19,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644127463] [2019-12-07 17:28:19,689 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 17:28:19,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:28:19,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 17:28:19,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2019-12-07 17:28:19,690 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand 16 states. [2019-12-07 17:28:19,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 17:28:19,891 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:28:19,892 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@773fbdc2 at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.managedscript.ManagedScript.lock(ManagedScript.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:354) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:202) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:127) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:60) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:62) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:359) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1066) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:968) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:188) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:698) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:627) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:454) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:139) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-12-07 17:28:19,898 INFO L168 Benchmark]: Toolchain (without parser) took 19043.30 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 93.3 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -118.3 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:28:19,898 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:28:19,899 INFO L168 Benchmark]: CACSL2BoogieTranslator took 185.56 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 93.3 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -142.0 MB). Peak memory consumption was 24.2 MB. Max. memory is 11.5 GB. [2019-12-07 17:28:19,899 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.10 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:28:19,900 INFO L168 Benchmark]: Boogie Preprocessor took 18.85 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 17:28:19,900 INFO L168 Benchmark]: RCFGBuilder took 208.75 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. [2019-12-07 17:28:19,901 INFO L168 Benchmark]: TraceAbstraction took 18600.13 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -3.6 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:28:19,903 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 185.56 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 93.3 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -142.0 MB). Peak memory consumption was 24.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 27.10 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.85 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 208.75 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 18600.13 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -3.6 MB). There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@773fbdc2 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@773fbdc2: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.managedscript.ManagedScript.lock(ManagedScript.java:83) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.25-f470102 [2019-12-07 17:28:21,084 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 17:28:21,086 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 17:28:21,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 17:28:21,094 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 17:28:21,094 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 17:28:21,095 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 17:28:21,097 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 17:28:21,098 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 17:28:21,099 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 17:28:21,099 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 17:28:21,100 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 17:28:21,100 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 17:28:21,101 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 17:28:21,101 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 17:28:21,102 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 17:28:21,103 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 17:28:21,103 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 17:28:21,105 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 17:28:21,106 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 17:28:21,107 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 17:28:21,108 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 17:28:21,109 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 17:28:21,109 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 17:28:21,111 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 17:28:21,111 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 17:28:21,112 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 17:28:21,112 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 17:28:21,112 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 17:28:21,113 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 17:28:21,113 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 17:28:21,114 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 17:28:21,114 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 17:28:21,115 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 17:28:21,115 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 17:28:21,115 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 17:28:21,116 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 17:28:21,116 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 17:28:21,116 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 17:28:21,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 17:28:21,117 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 17:28:21,118 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-12-07 17:28:21,127 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 17:28:21,128 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 17:28:21,128 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 17:28:21,128 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 17:28:21,129 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 17:28:21,129 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 17:28:21,129 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 17:28:21,129 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 17:28:21,129 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 17:28:21,129 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 17:28:21,129 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 17:28:21,130 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 17:28:21,130 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-12-07 17:28:21,130 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-12-07 17:28:21,130 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 17:28:21,130 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 17:28:21,130 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 17:28:21,130 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 17:28:21,130 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 17:28:21,131 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 17:28:21,131 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 17:28:21,131 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 17:28:21,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 17:28:21,131 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 17:28:21,131 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 17:28:21,131 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 17:28:21,131 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-12-07 17:28:21,132 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-12-07 17:28:21,132 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 17:28:21,132 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 17:28:21,132 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 17:28:21,132 INFO L138 SettingsManager]: * Logic for external solver=AUFBV Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/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 -> e150e83dea41703782a488455769a24bf6c8f600 [2019-12-07 17:28:21,301 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 17:28:21,309 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 17:28:21,311 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 17:28:21,312 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 17:28:21,312 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 17:28:21,313 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/bin/uautomizer/../../sv-benchmarks/c/reducercommutativity/sep.i [2019-12-07 17:28:21,349 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/bin/uautomizer/data/699d7280e/d97aaabc03f140c4b2f8ef4b879b6265/FLAG437709370 [2019-12-07 17:28:21,754 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 17:28:21,754 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/sv-benchmarks/c/reducercommutativity/sep.i [2019-12-07 17:28:21,758 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/bin/uautomizer/data/699d7280e/d97aaabc03f140c4b2f8ef4b879b6265/FLAG437709370 [2019-12-07 17:28:21,767 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/bin/uautomizer/data/699d7280e/d97aaabc03f140c4b2f8ef4b879b6265 [2019-12-07 17:28:21,769 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 17:28:21,770 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 17:28:21,770 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 17:28:21,770 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 17:28:21,772 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 17:28:21,773 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 05:28:21" (1/1) ... [2019-12-07 17:28:21,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5504cd65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:28:21, skipping insertion in model container [2019-12-07 17:28:21,775 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 05:28:21" (1/1) ... [2019-12-07 17:28:21,779 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 17:28:21,791 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 17:28:21,898 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 17:28:21,905 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 17:28:21,920 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 17:28:21,930 INFO L208 MainTranslator]: Completed translation [2019-12-07 17:28:21,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:28:21 WrapperNode [2019-12-07 17:28:21,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 17:28:21,931 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 17:28:21,931 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 17:28:21,931 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 17:28:21,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:28:21" (1/1) ... [2019-12-07 17:28:21,944 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:28:21" (1/1) ... [2019-12-07 17:28:21,989 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 17:28:21,989 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 17:28:21,989 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 17:28:21,989 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 17:28:21,995 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:28:21" (1/1) ... [2019-12-07 17:28:21,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:28:21" (1/1) ... [2019-12-07 17:28:21,998 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:28:21" (1/1) ... [2019-12-07 17:28:21,998 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:28:21" (1/1) ... [2019-12-07 17:28:22,003 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:28:21" (1/1) ... [2019-12-07 17:28:22,006 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:28:21" (1/1) ... [2019-12-07 17:28:22,008 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:28:21" (1/1) ... [2019-12-07 17:28:22,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 17:28:22,010 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 17:28:22,010 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 17:28:22,010 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 17:28:22,011 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:28:21" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/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 [2019-12-07 17:28:22,048 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-12-07 17:28:22,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 17:28:22,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 17:28:22,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 17:28:22,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 17:28:22,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-12-07 17:28:22,246 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 17:28:22,247 INFO L287 CfgBuilder]: Removed 14 assume(true) statements. [2019-12-07 17:28:22,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:28:22 BoogieIcfgContainer [2019-12-07 17:28:22,248 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 17:28:22,248 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 17:28:22,248 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 17:28:22,250 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 17:28:22,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 05:28:21" (1/3) ... [2019-12-07 17:28:22,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d544c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 05:28:22, skipping insertion in model container [2019-12-07 17:28:22,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:28:21" (2/3) ... [2019-12-07 17:28:22,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d544c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 05:28:22, skipping insertion in model container [2019-12-07 17:28:22,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:28:22" (3/3) ... [2019-12-07 17:28:22,252 INFO L109 eAbstractionObserver]: Analyzing ICFG sep.i [2019-12-07 17:28:22,259 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 17:28:22,262 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 17:28:22,271 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 17:28:22,285 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 17:28:22,285 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 17:28:22,285 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 17:28:22,285 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 17:28:22,285 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 17:28:22,286 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 17:28:22,286 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 17:28:22,286 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 17:28:22,294 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-12-07 17:28:22,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 17:28:22,298 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:28:22,299 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:28:22,299 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:28:22,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:28:22,303 INFO L82 PathProgramCache]: Analyzing trace with hash -805411982, now seen corresponding path program 1 times [2019-12-07 17:28:22,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 17:28:22,311 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [11300100] [2019-12-07 17:28:22,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/bin/uautomizer/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2019-12-07 17:28:22,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:28:22,382 INFO L264 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 1 conjunts are in the unsatisfiable core [2019-12-07 17:28:22,387 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:28:22,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:28:22,398 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 17:28:22,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:28:22,403 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [11300100] [2019-12-07 17:28:22,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:28:22,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-12-07 17:28:22,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963482720] [2019-12-07 17:28:22,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 17:28:22,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 17:28:22,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 17:28:22,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 17:28:22,418 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2019-12-07 17:28:22,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:28:22,432 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2019-12-07 17:28:22,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 17:28:22,433 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2019-12-07 17:28:22,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:28:22,439 INFO L225 Difference]: With dead ends: 52 [2019-12-07 17:28:22,440 INFO L226 Difference]: Without dead ends: 24 [2019-12-07 17:28:22,442 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 17:28:22,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-12-07 17:28:22,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-12-07 17:28:22,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-12-07 17:28:22,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2019-12-07 17:28:22,466 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 16 [2019-12-07 17:28:22,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:28:22,466 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2019-12-07 17:28:22,467 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 17:28:22,467 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2019-12-07 17:28:22,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 17:28:22,467 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:28:22,468 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:28:22,668 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2019-12-07 17:28:22,669 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:28:22,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:28:22,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1872946201, now seen corresponding path program 1 times [2019-12-07 17:28:22,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 17:28:22,671 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1643901173] [2019-12-07 17:28:22,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/bin/uautomizer/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2019-12-07 17:28:22,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:28:22,747 INFO L264 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 17:28:22,750 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:28:22,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:28:22,861 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 17:28:22,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:28:22,945 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1643901173] [2019-12-07 17:28:22,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:28:22,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 15 [2019-12-07 17:28:22,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843801839] [2019-12-07 17:28:22,946 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-07 17:28:22,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 17:28:22,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-07 17:28:22,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2019-12-07 17:28:22,947 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand 15 states. [2019-12-07 17:28:23,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:28:23,220 INFO L93 Difference]: Finished difference Result 64 states and 81 transitions. [2019-12-07 17:28:23,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 17:28:23,220 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2019-12-07 17:28:23,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:28:23,222 INFO L225 Difference]: With dead ends: 64 [2019-12-07 17:28:23,222 INFO L226 Difference]: Without dead ends: 59 [2019-12-07 17:28:23,223 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2019-12-07 17:28:23,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-12-07 17:28:23,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2019-12-07 17:28:23,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-07 17:28:23,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2019-12-07 17:28:23,230 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 16 [2019-12-07 17:28:23,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:28:23,230 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2019-12-07 17:28:23,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-07 17:28:23,230 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2019-12-07 17:28:23,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-07 17:28:23,231 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:28:23,231 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:28:23,431 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2019-12-07 17:28:23,432 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:28:23,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:28:23,433 INFO L82 PathProgramCache]: Analyzing trace with hash -528068644, now seen corresponding path program 1 times [2019-12-07 17:28:23,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 17:28:23,434 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1415240864] [2019-12-07 17:28:23,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/bin/uautomizer/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2019-12-07 17:28:23,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:28:23,510 INFO L264 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 17:28:23,511 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:28:23,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 17:28:23,523 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 17:28:23,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 17:28:23,532 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1415240864] [2019-12-07 17:28:23,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:28:23,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-12-07 17:28:23,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428712231] [2019-12-07 17:28:23,533 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 17:28:23,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 17:28:23,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 17:28:23,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 17:28:23,533 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 4 states. [2019-12-07 17:28:23,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:28:23,580 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2019-12-07 17:28:23,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 17:28:23,581 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-12-07 17:28:23,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:28:23,581 INFO L225 Difference]: With dead ends: 55 [2019-12-07 17:28:23,581 INFO L226 Difference]: Without dead ends: 28 [2019-12-07 17:28:23,582 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 17:28:23,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-07 17:28:23,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-12-07 17:28:23,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-07 17:28:23,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2019-12-07 17:28:23,585 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 19 [2019-12-07 17:28:23,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:28:23,585 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2019-12-07 17:28:23,585 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 17:28:23,585 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2019-12-07 17:28:23,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-07 17:28:23,586 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:28:23,586 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:28:23,787 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2019-12-07 17:28:23,787 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:28:23,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:28:23,788 INFO L82 PathProgramCache]: Analyzing trace with hash -877574393, now seen corresponding path program 1 times [2019-12-07 17:28:23,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 17:28:23,789 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185163404] [2019-12-07 17:28:23,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/bin/uautomizer/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2019-12-07 17:28:23,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:28:23,873 INFO L264 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 17:28:23,874 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:28:23,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:28:23,924 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 17:28:24,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:28:24,024 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185163404] [2019-12-07 17:28:24,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:28:24,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-12-07 17:28:24,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298149126] [2019-12-07 17:28:24,025 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 17:28:24,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 17:28:24,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 17:28:24,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2019-12-07 17:28:24,026 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 12 states. [2019-12-07 17:28:24,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:28:24,218 INFO L93 Difference]: Finished difference Result 77 states and 103 transitions. [2019-12-07 17:28:24,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 17:28:24,219 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2019-12-07 17:28:24,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:28:24,219 INFO L225 Difference]: With dead ends: 77 [2019-12-07 17:28:24,219 INFO L226 Difference]: Without dead ends: 61 [2019-12-07 17:28:24,220 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2019-12-07 17:28:24,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-12-07 17:28:24,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2019-12-07 17:28:24,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-12-07 17:28:24,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2019-12-07 17:28:24,226 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 22 [2019-12-07 17:28:24,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:28:24,226 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2019-12-07 17:28:24,226 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 17:28:24,227 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2019-12-07 17:28:24,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-12-07 17:28:24,227 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:28:24,228 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:28:24,428 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2019-12-07 17:28:24,429 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:28:24,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:28:24,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1474637889, now seen corresponding path program 1 times [2019-12-07 17:28:24,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 17:28:24,430 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1343780572] [2019-12-07 17:28:24,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/bin/uautomizer/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2019-12-07 17:28:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:28:24,535 INFO L264 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-07 17:28:24,537 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:28:24,612 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 17:28:24,612 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 17:28:24,800 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 17:28:24,800 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1343780572] [2019-12-07 17:28:24,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:28:24,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-12-07 17:28:24,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127254148] [2019-12-07 17:28:24,801 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 17:28:24,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 17:28:24,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 17:28:24,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-12-07 17:28:24,801 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand 16 states. [2019-12-07 17:28:25,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:28:25,140 INFO L93 Difference]: Finished difference Result 140 states and 187 transitions. [2019-12-07 17:28:25,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-07 17:28:25,140 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2019-12-07 17:28:25,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:28:25,141 INFO L225 Difference]: With dead ends: 140 [2019-12-07 17:28:25,141 INFO L226 Difference]: Without dead ends: 123 [2019-12-07 17:28:25,142 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2019-12-07 17:28:25,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-12-07 17:28:25,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 93. [2019-12-07 17:28:25,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-12-07 17:28:25,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 123 transitions. [2019-12-07 17:28:25,152 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 123 transitions. Word has length 31 [2019-12-07 17:28:25,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:28:25,152 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 123 transitions. [2019-12-07 17:28:25,152 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-07 17:28:25,152 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 123 transitions. [2019-12-07 17:28:25,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-12-07 17:28:25,153 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:28:25,153 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:28:25,354 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2019-12-07 17:28:25,354 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:28:25,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:28:25,355 INFO L82 PathProgramCache]: Analyzing trace with hash -2038223641, now seen corresponding path program 2 times [2019-12-07 17:28:25,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 17:28:25,356 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1998058650] [2019-12-07 17:28:25,356 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/bin/uautomizer/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2019-12-07 17:28:25,426 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-12-07 17:28:25,427 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:28:25,431 INFO L264 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 17:28:25,435 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:28:25,470 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 17:28:25,470 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 17:28:25,524 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 17:28:25,525 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1998058650] [2019-12-07 17:28:25,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:28:25,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-12-07 17:28:25,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834107594] [2019-12-07 17:28:25,525 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 17:28:25,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 17:28:25,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 17:28:25,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-12-07 17:28:25,526 INFO L87 Difference]: Start difference. First operand 93 states and 123 transitions. Second operand 6 states. [2019-12-07 17:28:25,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:28:25,616 INFO L93 Difference]: Finished difference Result 128 states and 168 transitions. [2019-12-07 17:28:25,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 17:28:25,616 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2019-12-07 17:28:25,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:28:25,617 INFO L225 Difference]: With dead ends: 128 [2019-12-07 17:28:25,617 INFO L226 Difference]: Without dead ends: 99 [2019-12-07 17:28:25,618 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-12-07 17:28:25,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-12-07 17:28:25,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2019-12-07 17:28:25,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-07 17:28:25,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 126 transitions. [2019-12-07 17:28:25,625 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 126 transitions. Word has length 34 [2019-12-07 17:28:25,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:28:25,625 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 126 transitions. [2019-12-07 17:28:25,625 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 17:28:25,625 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 126 transitions. [2019-12-07 17:28:25,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-07 17:28:25,626 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:28:25,626 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:28:25,827 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2019-12-07 17:28:25,827 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:28:25,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:28:25,828 INFO L82 PathProgramCache]: Analyzing trace with hash 657704709, now seen corresponding path program 1 times [2019-12-07 17:28:25,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 17:28:25,829 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [690531893] [2019-12-07 17:28:25,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/bin/uautomizer/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2019-12-07 17:28:25,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:28:25,915 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-07 17:28:25,917 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:28:26,065 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 17:28:26,065 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 17:28:26,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 17:28:26,308 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [690531893] [2019-12-07 17:28:26,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:28:26,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2019-12-07 17:28:26,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24456408] [2019-12-07 17:28:26,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-12-07 17:28:26,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 17:28:26,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-12-07 17:28:26,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2019-12-07 17:28:26,310 INFO L87 Difference]: Start difference. First operand 96 states and 126 transitions. Second operand 27 states. [2019-12-07 17:28:27,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:28:27,043 INFO L93 Difference]: Finished difference Result 457 states and 585 transitions. [2019-12-07 17:28:27,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-07 17:28:27,044 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 36 [2019-12-07 17:28:27,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:28:27,046 INFO L225 Difference]: With dead ends: 457 [2019-12-07 17:28:27,046 INFO L226 Difference]: Without dead ends: 450 [2019-12-07 17:28:27,047 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2019-12-07 17:28:27,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2019-12-07 17:28:27,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 190. [2019-12-07 17:28:27,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2019-12-07 17:28:27,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 259 transitions. [2019-12-07 17:28:27,064 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 259 transitions. Word has length 36 [2019-12-07 17:28:27,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:28:27,065 INFO L462 AbstractCegarLoop]: Abstraction has 190 states and 259 transitions. [2019-12-07 17:28:27,065 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-12-07 17:28:27,065 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 259 transitions. [2019-12-07 17:28:27,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-07 17:28:27,066 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:28:27,066 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:28:27,267 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2019-12-07 17:28:27,267 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:28:27,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:28:27,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1862255225, now seen corresponding path program 1 times [2019-12-07 17:28:27,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 17:28:27,269 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2108496811] [2019-12-07 17:28:27,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/bin/uautomizer/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2019-12-07 17:28:27,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:28:27,390 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 26 conjunts are in the unsatisfiable core [2019-12-07 17:28:27,391 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:28:27,539 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2019-12-07 17:28:27,539 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:28:27,548 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:28:27,548 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:28:27,548 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2019-12-07 17:28:27,575 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-12-07 17:28:27,575 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:28:27,590 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:28:27,591 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 17:28:27,591 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:27 [2019-12-07 17:28:27,668 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 17:28:27,669 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:28:27,670 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 12 [2019-12-07 17:28:27,670 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:28:27,675 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:28:27,676 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:28:27,676 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:5 [2019-12-07 17:28:27,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 17:28:27,704 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 17:28:27,800 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2019-12-07 17:28:27,804 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2019-12-07 17:28:27,805 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2019-12-07 17:28:27,811 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:28:27,811 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2019-12-07 17:28:27,816 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:28:27,816 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-12-07 17:28:27,816 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:19, output treesize:16 [2019-12-07 17:28:28,002 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:28:28,020 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 6 [2019-12-07 17:28:28,022 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:28:28,056 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:28:28,057 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 27 [2019-12-07 17:28:28,058 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 17:28:28,062 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2019-12-07 17:28:28,089 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:28:28,089 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2019-12-07 17:28:28,090 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:47, output treesize:18 [2019-12-07 17:28:28,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-07 17:28:28,418 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2108496811] [2019-12-07 17:28:28,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:28:28,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2019-12-07 17:28:28,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793093086] [2019-12-07 17:28:28,419 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-07 17:28:28,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 17:28:28,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-07 17:28:28,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2019-12-07 17:28:28,419 INFO L87 Difference]: Start difference. First operand 190 states and 259 transitions. Second operand 24 states. [2019-12-07 17:28:29,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:28:29,780 INFO L93 Difference]: Finished difference Result 250 states and 321 transitions. [2019-12-07 17:28:29,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-07 17:28:29,781 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 36 [2019-12-07 17:28:29,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:28:29,782 INFO L225 Difference]: With dead ends: 250 [2019-12-07 17:28:29,782 INFO L226 Difference]: Without dead ends: 240 [2019-12-07 17:28:29,783 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2019-12-07 17:28:29,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2019-12-07 17:28:29,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 203. [2019-12-07 17:28:29,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2019-12-07 17:28:29,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 274 transitions. [2019-12-07 17:28:29,795 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 274 transitions. Word has length 36 [2019-12-07 17:28:29,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:28:29,795 INFO L462 AbstractCegarLoop]: Abstraction has 203 states and 274 transitions. [2019-12-07 17:28:29,795 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-07 17:28:29,795 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 274 transitions. [2019-12-07 17:28:29,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-07 17:28:29,797 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:28:29,797 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:28:29,997 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2019-12-07 17:28:29,997 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:28:29,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:28:29,998 INFO L82 PathProgramCache]: Analyzing trace with hash 264677699, now seen corresponding path program 2 times [2019-12-07 17:28:29,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 17:28:29,998 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1805257670] [2019-12-07 17:28:29,998 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/bin/uautomizer/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2019-12-07 17:28:30,086 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 17:28:30,086 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:28:30,094 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-07 17:28:30,096 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:28:30,208 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:28:30,209 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:28:30,210 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2019-12-07 17:28:30,210 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:28:30,219 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:28:30,219 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:28:30,219 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:22 [2019-12-07 17:28:30,275 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:28:30,276 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 22 [2019-12-07 17:28:30,276 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:28:30,288 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:28:30,288 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:28:30,288 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:33 [2019-12-07 17:28:30,325 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 17:28:30,326 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 17:28:30,328 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:28:30,328 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 37 [2019-12-07 17:28:30,328 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:28:30,357 INFO L614 ElimStorePlain]: treesize reduction 12, result has 72.7 percent of original size [2019-12-07 17:28:30,358 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:28:30,359 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:16 [2019-12-07 17:28:30,398 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2019-12-07 17:28:30,399 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 17:28:30,401 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:28:30,401 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 17:28:30,401 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:5 [2019-12-07 17:28:30,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 17:28:30,427 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 17:28:30,919 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 17:28:30,919 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2019-12-07 17:28:30,920 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 17:28:30,922 INFO L430 ElimStorePlain]: Different costs {0=[v_arrayElimCell_16], 1=[v_arrayElimCell_15]} [2019-12-07 17:28:30,925 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1805257670] [2019-12-07 17:28:30,926 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@6d9bb3a9 [2019-12-07 17:28:30,926 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [897242652] [2019-12-07 17:28:30,926 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/bin/uautomizer/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 17:28:31,097 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 17:28:31,098 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:28:31,099 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 32 conjunts are in the unsatisfiable core [2019-12-07 17:28:31,101 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:28:31,104 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@6d9bb3a9 [2019-12-07 17:28:31,104 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363814995] [2019-12-07 17:28:31,104 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cf5c9a43-a775-47db-890f-93cfa695e24b/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:28:31,203 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 17:28:31,203 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 17:28:31,207 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 27 conjunts are in the unsatisfiable core [2019-12-07 17:28:31,209 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:28:31,210 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@6d9bb3a9 [2019-12-07 17:28:31,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:28:31,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2019-12-07 17:28:31,210 ERROR L206 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2019-12-07 17:28:31,210 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 17:28:31,815 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 mathsat -unsat_core_generation=3,11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-12-07 17:28:31,836 WARN L229 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2019-12-07 17:28:31,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 05:28:31 BoogieIcfgContainer [2019-12-07 17:28:31,836 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 17:28:31,836 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 17:28:31,836 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 17:28:31,837 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 17:28:31,837 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:28:22" (3/4) ... [2019-12-07 17:28:31,839 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-12-07 17:28:31,839 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 17:28:31,840 INFO L168 Benchmark]: Toolchain (without parser) took 10070.86 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 294.1 MB). Free memory was 953.7 MB in the beginning and 1.1 GB in the end (delta: -160.8 MB). Peak memory consumption was 133.3 MB. Max. memory is 11.5 GB. [2019-12-07 17:28:31,841 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:28:31,841 INFO L168 Benchmark]: CACSL2BoogieTranslator took 160.88 ms. Allocated memory is still 1.0 GB. Free memory was 953.7 MB in the beginning and 943.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-12-07 17:28:31,842 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.77 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.8 MB). Free memory was 943.0 MB in the beginning and 1.1 GB in the end (delta: -188.8 MB). Peak memory consumption was 15.5 MB. Max. memory is 11.5 GB. [2019-12-07 17:28:31,842 INFO L168 Benchmark]: Boogie Preprocessor took 20.47 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2019-12-07 17:28:31,843 INFO L168 Benchmark]: RCFGBuilder took 237.86 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. [2019-12-07 17:28:31,843 INFO L168 Benchmark]: TraceAbstraction took 9588.02 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 158.3 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -7.7 MB). Peak memory consumption was 150.6 MB. Max. memory is 11.5 GB. [2019-12-07 17:28:31,844 INFO L168 Benchmark]: Witness Printer took 2.97 ms. Allocated memory is still 1.3 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:28:31,846 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 160.88 ms. Allocated memory is still 1.0 GB. Free memory was 953.7 MB in the beginning and 943.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 57.77 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.8 MB). Free memory was 943.0 MB in the beginning and 1.1 GB in the end (delta: -188.8 MB). Peak memory consumption was 15.5 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.47 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 237.86 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 9588.02 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 158.3 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -7.7 MB). Peak memory consumption was 150.6 MB. Max. memory is 11.5 GB. * Witness Printer took 2.97 ms. Allocated memory is still 1.3 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 42]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L4] int N; [L22] N = __VERIFIER_nondet_int() [L23] COND TRUE N > 1 [L24] int x[N]; [L25] int temp; [L26] int ret; [L27] int ret2; [L28] int ret5; [L8] long long ret =0; [L9] int i=0; [L9] COND TRUE i