./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/sll2c_remove_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_0b7b8702-5782-4891-bb27-f1526c6fc8e2/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_0b7b8702-5782-4891-bb27-f1526c6fc8e2/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_0b7b8702-5782-4891-bb27-f1526c6fc8e2/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_0b7b8702-5782-4891-bb27-f1526c6fc8e2/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-simple/sll2c_remove_all_reverse.i -s /tmp/vcloud-vcloud-master/worker/run_dir_0b7b8702-5782-4891-bb27-f1526c6fc8e2/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_0b7b8702-5782-4891-bb27-f1526c6fc8e2/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 8e9bd4c45107b8bac8caf02aded500b0232909d1 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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_0b7b8702-5782-4891-bb27-f1526c6fc8e2/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_0b7b8702-5782-4891-bb27-f1526c6fc8e2/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_0b7b8702-5782-4891-bb27-f1526c6fc8e2/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_0b7b8702-5782-4891-bb27-f1526c6fc8e2/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-simple/sll2c_remove_all_reverse.i -s /tmp/vcloud-vcloud-master/worker/run_dir_0b7b8702-5782-4891-bb27-f1526c6fc8e2/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_0b7b8702-5782-4891-bb27-f1526c6fc8e2/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 8e9bd4c45107b8bac8caf02aded500b0232909d1 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: UnsupportedOperationException: expected NNF --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-16 00:37:25,259 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-16 00:37:25,261 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-16 00:37:25,275 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-16 00:37:25,275 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-16 00:37:25,277 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-16 00:37:25,278 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-16 00:37:25,287 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-16 00:37:25,292 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-16 00:37:25,296 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-16 00:37:25,298 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-16 00:37:25,299 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-16 00:37:25,299 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-16 00:37:25,301 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-16 00:37:25,302 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-16 00:37:25,303 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-16 00:37:25,304 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-16 00:37:25,304 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-16 00:37:25,307 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-16 00:37:25,311 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-16 00:37:25,314 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-16 00:37:25,316 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-16 00:37:25,318 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-16 00:37:25,319 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-16 00:37:25,322 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-16 00:37:25,322 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-16 00:37:25,322 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-16 00:37:25,323 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-16 00:37:25,324 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-16 00:37:25,325 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-16 00:37:25,325 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-16 00:37:25,326 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-16 00:37:25,326 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-16 00:37:25,327 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-16 00:37:25,328 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-16 00:37:25,328 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-16 00:37:25,329 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-16 00:37:25,329 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-16 00:37:25,329 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-16 00:37:25,330 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-16 00:37:25,330 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-16 00:37:25,332 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_0b7b8702-5782-4891-bb27-f1526c6fc8e2/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-16 00:37:25,355 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-16 00:37:25,356 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-16 00:37:25,357 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-16 00:37:25,357 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-16 00:37:25,357 INFO L138 SettingsManager]: * Use SBE=true [2019-11-16 00:37:25,357 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-16 00:37:25,358 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-16 00:37:25,358 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-16 00:37:25,358 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-16 00:37:25,358 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-16 00:37:25,358 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-16 00:37:25,359 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-16 00:37:25,359 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-16 00:37:25,359 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-16 00:37:25,359 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-16 00:37:25,359 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-16 00:37:25,360 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-16 00:37:25,360 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-16 00:37:25,360 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-16 00:37:25,360 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-16 00:37:25,360 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-16 00:37:25,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-16 00:37:25,361 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-16 00:37:25,361 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-16 00:37:25,361 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-16 00:37:25,361 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-16 00:37:25,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-16 00:37:25,362 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-16 00:37:25,362 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_0b7b8702-5782-4891-bb27-f1526c6fc8e2/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 -> 8e9bd4c45107b8bac8caf02aded500b0232909d1 [2019-11-16 00:37:25,386 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-16 00:37:25,396 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-16 00:37:25,399 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-16 00:37:25,400 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-16 00:37:25,401 INFO L275 PluginConnector]: CDTParser initialized [2019-11-16 00:37:25,403 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_0b7b8702-5782-4891-bb27-f1526c6fc8e2/bin/uautomizer/../../sv-benchmarks/c/list-simple/sll2c_remove_all_reverse.i [2019-11-16 00:37:25,457 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0b7b8702-5782-4891-bb27-f1526c6fc8e2/bin/uautomizer/data/4f4add13c/f190710df72b44b5b6c8c070cfbc24b8/FLAGef6cbc89d [2019-11-16 00:37:25,871 INFO L306 CDTParser]: Found 1 translation units. [2019-11-16 00:37:25,871 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_0b7b8702-5782-4891-bb27-f1526c6fc8e2/sv-benchmarks/c/list-simple/sll2c_remove_all_reverse.i [2019-11-16 00:37:25,882 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0b7b8702-5782-4891-bb27-f1526c6fc8e2/bin/uautomizer/data/4f4add13c/f190710df72b44b5b6c8c070cfbc24b8/FLAGef6cbc89d [2019-11-16 00:37:26,201 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_0b7b8702-5782-4891-bb27-f1526c6fc8e2/bin/uautomizer/data/4f4add13c/f190710df72b44b5b6c8c070cfbc24b8 [2019-11-16 00:37:26,203 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-16 00:37:26,204 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-16 00:37:26,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-16 00:37:26,205 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-16 00:37:26,209 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-16 00:37:26,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:37:26" (1/1) ... [2019-11-16 00:37:26,213 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a4dff56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:26, skipping insertion in model container [2019-11-16 00:37:26,213 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:37:26" (1/1) ... [2019-11-16 00:37:26,220 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-16 00:37:26,263 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-16 00:37:26,605 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-16 00:37:26,615 INFO L188 MainTranslator]: Completed pre-run [2019-11-16 00:37:26,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-16 00:37:26,761 INFO L192 MainTranslator]: Completed translation [2019-11-16 00:37:26,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:26 WrapperNode [2019-11-16 00:37:26,762 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-16 00:37:26,763 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-16 00:37:26,763 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-16 00:37:26,763 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-16 00:37:26,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:26" (1/1) ... [2019-11-16 00:37:26,795 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:26" (1/1) ... [2019-11-16 00:37:26,828 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-16 00:37:26,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-16 00:37:26,833 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-16 00:37:26,833 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-16 00:37:26,842 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:26" (1/1) ... [2019-11-16 00:37:26,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:26" (1/1) ... [2019-11-16 00:37:26,860 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:26" (1/1) ... [2019-11-16 00:37:26,860 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:26" (1/1) ... [2019-11-16 00:37:26,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:26" (1/1) ... [2019-11-16 00:37:26,874 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:26" (1/1) ... [2019-11-16 00:37:26,876 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:26" (1/1) ... [2019-11-16 00:37:26,880 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-16 00:37:26,881 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-16 00:37:26,881 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-16 00:37:26,881 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-16 00:37:26,882 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:26" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0b7b8702-5782-4891-bb27-f1526c6fc8e2/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-16 00:37:26,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-16 00:37:26,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-16 00:37:26,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-16 00:37:26,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-16 00:37:26,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-16 00:37:26,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-16 00:37:26,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-16 00:37:26,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-16 00:37:26,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-16 00:37:27,438 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-16 00:37:27,439 INFO L284 CfgBuilder]: Removed 20 assume(true) statements. [2019-11-16 00:37:27,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:37:27 BoogieIcfgContainer [2019-11-16 00:37:27,440 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-16 00:37:27,441 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-16 00:37:27,441 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-16 00:37:27,445 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-16 00:37:27,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:37:26" (1/3) ... [2019-11-16 00:37:27,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31025d13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:37:27, skipping insertion in model container [2019-11-16 00:37:27,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:26" (2/3) ... [2019-11-16 00:37:27,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31025d13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:37:27, skipping insertion in model container [2019-11-16 00:37:27,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:37:27" (3/3) ... [2019-11-16 00:37:27,451 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2c_remove_all_reverse.i [2019-11-16 00:37:27,460 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-16 00:37:27,469 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-16 00:37:27,483 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-16 00:37:27,514 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-16 00:37:27,514 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-16 00:37:27,514 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-16 00:37:27,515 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-16 00:37:27,515 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-16 00:37:27,515 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-16 00:37:27,515 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-16 00:37:27,515 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-16 00:37:27,533 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-11-16 00:37:27,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-16 00:37:27,541 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:37:27,542 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:37:27,545 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:37:27,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:37:27,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1936331042, now seen corresponding path program 1 times [2019-11-16 00:37:27,559 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:37:27,560 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225280527] [2019-11-16 00:37:27,560 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:37:27,560 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:37:27,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:37:27,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:37:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:37:27,744 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225280527] [2019-11-16 00:37:27,744 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:37:27,745 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-16 00:37:27,745 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629727704] [2019-11-16 00:37:27,749 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-16 00:37:27,749 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:37:27,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-16 00:37:27,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-16 00:37:27,763 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2019-11-16 00:37:27,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:37:27,779 INFO L93 Difference]: Finished difference Result 47 states and 65 transitions. [2019-11-16 00:37:27,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-16 00:37:27,780 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2019-11-16 00:37:27,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:37:27,787 INFO L225 Difference]: With dead ends: 47 [2019-11-16 00:37:27,787 INFO L226 Difference]: Without dead ends: 24 [2019-11-16 00:37:27,790 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-16 00:37:27,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-16 00:37:27,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-16 00:37:27,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-16 00:37:27,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-11-16 00:37:27,822 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 12 [2019-11-16 00:37:27,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:37:27,823 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-11-16 00:37:27,823 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-16 00:37:27,823 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-11-16 00:37:27,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-16 00:37:27,824 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:37:27,824 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:37:27,824 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:37:27,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:37:27,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1899977540, now seen corresponding path program 1 times [2019-11-16 00:37:27,825 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:37:27,825 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044134453] [2019-11-16 00:37:27,825 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:37:27,825 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:37:27,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:37:27,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:37:27,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:37:27,885 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044134453] [2019-11-16 00:37:27,885 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:37:27,885 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-16 00:37:27,885 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139151905] [2019-11-16 00:37:27,887 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-16 00:37:27,887 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:37:27,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-16 00:37:27,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-16 00:37:27,888 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2019-11-16 00:37:27,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:37:27,920 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2019-11-16 00:37:27,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-16 00:37:27,921 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-16 00:37:27,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:37:27,922 INFO L225 Difference]: With dead ends: 43 [2019-11-16 00:37:27,922 INFO L226 Difference]: Without dead ends: 28 [2019-11-16 00:37:27,923 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-16 00:37:27,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-16 00:37:27,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2019-11-16 00:37:27,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-16 00:37:27,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-11-16 00:37:27,928 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 12 [2019-11-16 00:37:27,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:37:27,928 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-11-16 00:37:27,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-16 00:37:27,929 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-11-16 00:37:27,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-16 00:37:27,929 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:37:27,929 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:37:27,930 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:37:27,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:37:27,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1177934452, now seen corresponding path program 1 times [2019-11-16 00:37:27,930 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:37:27,930 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394201421] [2019-11-16 00:37:27,931 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:37:27,931 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:37:27,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:37:27,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:37:28,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:37:28,040 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394201421] [2019-11-16 00:37:28,041 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692735418] [2019-11-16 00:37:28,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0b7b8702-5782-4891-bb27-f1526c6fc8e2/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:37:28,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:37:28,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-16 00:37:28,160 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:37:28,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-16 00:37:28,192 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-16 00:37:28,192 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2019-11-16 00:37:28,193 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677785919] [2019-11-16 00:37:28,193 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-16 00:37:28,193 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:37:28,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-16 00:37:28,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-16 00:37:28,194 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 4 states. [2019-11-16 00:37:28,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:37:28,246 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2019-11-16 00:37:28,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-16 00:37:28,247 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-11-16 00:37:28,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:37:28,248 INFO L225 Difference]: With dead ends: 38 [2019-11-16 00:37:28,248 INFO L226 Difference]: Without dead ends: 34 [2019-11-16 00:37:28,248 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-16 00:37:28,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-16 00:37:28,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2019-11-16 00:37:28,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-16 00:37:28,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-16 00:37:28,254 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2019-11-16 00:37:28,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:37:28,255 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-16 00:37:28,255 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-16 00:37:28,255 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-16 00:37:28,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-16 00:37:28,256 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:37:28,256 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:37:28,457 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:37:28,457 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:37:28,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:37:28,457 INFO L82 PathProgramCache]: Analyzing trace with hash 492101394, now seen corresponding path program 1 times [2019-11-16 00:37:28,458 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:37:28,458 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343495279] [2019-11-16 00:37:28,458 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:37:28,458 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:37:28,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:37:28,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:37:28,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-16 00:37:28,622 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343495279] [2019-11-16 00:37:28,623 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:37:28,623 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-16 00:37:28,623 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914558616] [2019-11-16 00:37:28,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-16 00:37:28,624 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:37:28,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-16 00:37:28,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-16 00:37:28,624 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2019-11-16 00:37:28,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:37:28,820 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2019-11-16 00:37:28,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-16 00:37:28,821 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-11-16 00:37:28,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:37:28,822 INFO L225 Difference]: With dead ends: 39 [2019-11-16 00:37:28,822 INFO L226 Difference]: Without dead ends: 26 [2019-11-16 00:37:28,823 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-16 00:37:28,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-16 00:37:28,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-16 00:37:28,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-16 00:37:28,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2019-11-16 00:37:28,828 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 22 [2019-11-16 00:37:28,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:37:28,830 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2019-11-16 00:37:28,830 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-16 00:37:28,830 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2019-11-16 00:37:28,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-16 00:37:28,832 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:37:28,832 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:37:28,832 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:37:28,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:37:28,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1824990045, now seen corresponding path program 1 times [2019-11-16 00:37:28,833 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:37:28,834 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752488921] [2019-11-16 00:37:28,834 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:37:28,834 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:37:28,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:37:28,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:37:28,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-16 00:37:28,919 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752488921] [2019-11-16 00:37:28,919 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:37:28,919 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-16 00:37:28,919 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593079096] [2019-11-16 00:37:28,920 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-16 00:37:28,920 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:37:28,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-16 00:37:28,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-16 00:37:28,921 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 4 states. [2019-11-16 00:37:28,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:37:28,984 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2019-11-16 00:37:28,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-16 00:37:28,984 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-11-16 00:37:28,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:37:28,985 INFO L225 Difference]: With dead ends: 43 [2019-11-16 00:37:28,985 INFO L226 Difference]: Without dead ends: 28 [2019-11-16 00:37:28,986 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-16 00:37:28,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-16 00:37:28,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-16 00:37:28,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-16 00:37:28,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2019-11-16 00:37:28,991 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 25 [2019-11-16 00:37:28,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:37:28,992 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2019-11-16 00:37:28,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-16 00:37:28,992 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2019-11-16 00:37:28,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-16 00:37:28,993 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:37:28,993 INFO L380 BasicCegarLoop]: trace histogram [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, 1] [2019-11-16 00:37:28,993 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:37:28,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:37:28,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1708129704, now seen corresponding path program 1 times [2019-11-16 00:37:28,994 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:37:28,994 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139773292] [2019-11-16 00:37:28,994 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:37:28,995 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:37:28,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:37:29,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:37:29,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-16 00:37:29,100 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139773292] [2019-11-16 00:37:29,101 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193146388] [2019-11-16 00:37:29,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0b7b8702-5782-4891-bb27-f1526c6fc8e2/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:37:29,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:37:29,200 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-16 00:37:29,205 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:37:29,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-16 00:37:29,256 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:37:29,256 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-11-16 00:37:29,257 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360084204] [2019-11-16 00:37:29,257 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-16 00:37:29,258 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:37:29,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-16 00:37:29,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-16 00:37:29,260 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 8 states. [2019-11-16 00:37:29,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:37:29,341 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2019-11-16 00:37:29,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-16 00:37:29,349 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2019-11-16 00:37:29,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:37:29,350 INFO L225 Difference]: With dead ends: 56 [2019-11-16 00:37:29,351 INFO L226 Difference]: Without dead ends: 52 [2019-11-16 00:37:29,351 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-16 00:37:29,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-16 00:37:29,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 39. [2019-11-16 00:37:29,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-16 00:37:29,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2019-11-16 00:37:29,359 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 27 [2019-11-16 00:37:29,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:37:29,359 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2019-11-16 00:37:29,359 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-16 00:37:29,359 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2019-11-16 00:37:29,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-16 00:37:29,361 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:37:29,361 INFO L380 BasicCegarLoop]: trace histogram [4, 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] [2019-11-16 00:37:29,561 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:37:29,562 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:37:29,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:37:29,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1000837620, now seen corresponding path program 2 times [2019-11-16 00:37:29,562 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:37:29,562 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432756595] [2019-11-16 00:37:29,563 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:37:29,563 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:37:29,563 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:37:29,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:37:30,345 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-16 00:37:30,345 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432756595] [2019-11-16 00:37:30,345 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082740523] [2019-11-16 00:37:30,346 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0b7b8702-5782-4891-bb27-f1526c6fc8e2/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:37:30,481 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-16 00:37:30,481 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:37:30,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 64 conjunts are in the unsatisfiable core [2019-11-16 00:37:30,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:37:30,547 INFO L341 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-16 00:37:30,548 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2019-11-16 00:37:30,548 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:37:30,557 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:37:30,557 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:37:30,557 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:14 [2019-11-16 00:37:30,701 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:37:30,701 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 15 [2019-11-16 00:37:30,702 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:37:30,707 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:37:30,707 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:37:30,708 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:8 [2019-11-16 00:37:31,039 INFO L341 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2019-11-16 00:37:31,040 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2019-11-16 00:37:31,041 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:37:31,053 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:37:31,059 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2019-11-16 00:37:31,059 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-16 00:37:31,068 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:37:31,069 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:37:31,069 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:66, output treesize:50 [2019-11-16 00:37:31,193 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:37:31,193 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 39 [2019-11-16 00:37:31,194 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:37:31,228 INFO L567 ElimStorePlain]: treesize reduction 5, result has 91.1 percent of original size [2019-11-16 00:37:31,229 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-16 00:37:31,230 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:89, output treesize:51 [2019-11-16 00:37:31,303 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-16 00:37:31,304 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:37:31,304 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2019-11-16 00:37:31,304 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878214430] [2019-11-16 00:37:31,305 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-16 00:37:31,305 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:37:31,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-16 00:37:31,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2019-11-16 00:37:31,306 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 29 states. [2019-11-16 00:37:32,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:37:32,298 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2019-11-16 00:37:32,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-16 00:37:32,299 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 38 [2019-11-16 00:37:32,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:37:32,300 INFO L225 Difference]: With dead ends: 70 [2019-11-16 00:37:32,300 INFO L226 Difference]: Without dead ends: 50 [2019-11-16 00:37:32,301 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=318, Invalid=1404, Unknown=0, NotChecked=0, Total=1722 [2019-11-16 00:37:32,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-16 00:37:32,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2019-11-16 00:37:32,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-16 00:37:32,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2019-11-16 00:37:32,318 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 38 [2019-11-16 00:37:32,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:37:32,319 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2019-11-16 00:37:32,319 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-16 00:37:32,319 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2019-11-16 00:37:32,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-16 00:37:32,320 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:37:32,320 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 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] [2019-11-16 00:37:32,521 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:37:32,521 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:37:32,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:37:32,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1937161681, now seen corresponding path program 1 times [2019-11-16 00:37:32,521 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:37:32,522 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345909061] [2019-11-16 00:37:32,522 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:37:32,522 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:37:32,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:37:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:37:32,621 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-16 00:37:32,621 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345909061] [2019-11-16 00:37:32,621 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087621322] [2019-11-16 00:37:32,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0b7b8702-5782-4891-bb27-f1526c6fc8e2/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:37:32,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:37:32,735 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-16 00:37:32,738 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:37:32,787 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:37:32,787 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 48 [2019-11-16 00:37:32,788 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:37:32,791 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:37:32,792 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-16 00:37:32,808 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:37:33,009 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:37:33,010 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.UnsupportedOperationException: expected NNF at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.UnsupportedOperationException: expected NNF at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:236) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive$TermWalker.walk(NonRecursive.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:195) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder.(ArrayOccurrenceAnalysis.java:181) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.(ArrayOccurrenceAnalysis.java:74) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:275) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:253) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:245) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:292) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:299) ... 21 more [2019-11-16 00:37:33,015 INFO L168 Benchmark]: Toolchain (without parser) took 6810.75 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 208.1 MB). Free memory was 939.4 MB in the beginning and 926.5 MB in the end (delta: 12.8 MB). Peak memory consumption was 221.0 MB. Max. memory is 11.5 GB. [2019-11-16 00:37:33,016 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-16 00:37:33,016 INFO L168 Benchmark]: CACSL2BoogieTranslator took 557.22 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.5 MB). Free memory was 939.4 MB in the beginning and 1.1 GB in the end (delta: -158.7 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2019-11-16 00:37:33,017 INFO L168 Benchmark]: Boogie Procedure Inliner took 69.31 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-16 00:37:33,017 INFO L168 Benchmark]: Boogie Preprocessor took 47.96 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-16 00:37:33,018 INFO L168 Benchmark]: RCFGBuilder took 559.78 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 35.4 MB). Peak memory consumption was 35.4 MB. Max. memory is 11.5 GB. [2019-11-16 00:37:33,019 INFO L168 Benchmark]: TraceAbstraction took 5571.22 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 78.6 MB). Free memory was 1.1 GB in the beginning and 926.5 MB in the end (delta: 136.2 MB). Peak memory consumption was 214.8 MB. Max. memory is 11.5 GB. [2019-11-16 00:37:33,022 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 557.22 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.5 MB). Free memory was 939.4 MB in the beginning and 1.1 GB in the end (delta: -158.7 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 69.31 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 47.96 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 559.78 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 35.4 MB). Peak memory consumption was 35.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5571.22 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 78.6 MB). Free memory was 1.1 GB in the beginning and 926.5 MB in the end (delta: 136.2 MB). Peak memory consumption was 214.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.UnsupportedOperationException: expected NNF de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.UnsupportedOperationException: expected NNF: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:307) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-cad4683 [2019-11-16 00:37:35,230 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-16 00:37:35,232 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-16 00:37:35,248 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-16 00:37:35,248 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-16 00:37:35,249 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-16 00:37:35,250 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-16 00:37:35,252 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-16 00:37:35,254 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-16 00:37:35,255 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-16 00:37:35,255 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-16 00:37:35,257 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-16 00:37:35,257 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-16 00:37:35,258 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-16 00:37:35,259 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-16 00:37:35,260 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-16 00:37:35,261 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-16 00:37:35,262 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-16 00:37:35,264 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-16 00:37:35,266 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-16 00:37:35,274 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-16 00:37:35,279 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-16 00:37:35,280 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-16 00:37:35,282 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-16 00:37:35,284 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-16 00:37:35,284 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-16 00:37:35,285 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-16 00:37:35,285 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-16 00:37:35,286 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-16 00:37:35,287 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-16 00:37:35,287 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-16 00:37:35,288 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-16 00:37:35,288 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-16 00:37:35,289 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-16 00:37:35,289 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-16 00:37:35,290 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-16 00:37:35,290 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-16 00:37:35,290 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-16 00:37:35,290 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-16 00:37:35,291 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-16 00:37:35,292 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-16 00:37:35,292 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_0b7b8702-5782-4891-bb27-f1526c6fc8e2/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-11-16 00:37:35,305 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-16 00:37:35,306 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-16 00:37:35,307 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-16 00:37:35,307 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-16 00:37:35,307 INFO L138 SettingsManager]: * Use SBE=true [2019-11-16 00:37:35,307 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-16 00:37:35,308 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-16 00:37:35,308 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-16 00:37:35,308 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-16 00:37:35,308 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-16 00:37:35,309 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-16 00:37:35,309 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-16 00:37:35,309 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-16 00:37:35,309 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-16 00:37:35,309 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-16 00:37:35,310 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-16 00:37:35,310 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-16 00:37:35,310 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-16 00:37:35,310 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-16 00:37:35,311 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-16 00:37:35,311 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-16 00:37:35,311 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-16 00:37:35,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-16 00:37:35,312 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-16 00:37:35,312 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-16 00:37:35,312 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-16 00:37:35,312 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-16 00:37:35,312 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-16 00:37:35,313 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-16 00:37:35,313 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-16 00:37:35,313 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_0b7b8702-5782-4891-bb27-f1526c6fc8e2/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 -> 8e9bd4c45107b8bac8caf02aded500b0232909d1 [2019-11-16 00:37:35,344 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-16 00:37:35,358 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-16 00:37:35,362 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-16 00:37:35,364 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-16 00:37:35,365 INFO L275 PluginConnector]: CDTParser initialized [2019-11-16 00:37:35,366 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_0b7b8702-5782-4891-bb27-f1526c6fc8e2/bin/uautomizer/../../sv-benchmarks/c/list-simple/sll2c_remove_all_reverse.i [2019-11-16 00:37:35,430 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0b7b8702-5782-4891-bb27-f1526c6fc8e2/bin/uautomizer/data/554cccd18/742a1b548a8245aa8632aab5057a2583/FLAG945394901 [2019-11-16 00:37:35,932 INFO L306 CDTParser]: Found 1 translation units. [2019-11-16 00:37:35,933 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_0b7b8702-5782-4891-bb27-f1526c6fc8e2/sv-benchmarks/c/list-simple/sll2c_remove_all_reverse.i [2019-11-16 00:37:35,946 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0b7b8702-5782-4891-bb27-f1526c6fc8e2/bin/uautomizer/data/554cccd18/742a1b548a8245aa8632aab5057a2583/FLAG945394901 [2019-11-16 00:37:36,244 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_0b7b8702-5782-4891-bb27-f1526c6fc8e2/bin/uautomizer/data/554cccd18/742a1b548a8245aa8632aab5057a2583 [2019-11-16 00:37:36,246 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-16 00:37:36,246 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-16 00:37:36,247 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-16 00:37:36,247 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-16 00:37:36,249 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-16 00:37:36,250 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:37:36" (1/1) ... [2019-11-16 00:37:36,252 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c3100ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:36, skipping insertion in model container [2019-11-16 00:37:36,252 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:37:36" (1/1) ... [2019-11-16 00:37:36,257 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-16 00:37:36,309 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-16 00:37:36,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-16 00:37:36,685 INFO L188 MainTranslator]: Completed pre-run [2019-11-16 00:37:36,739 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-16 00:37:36,793 INFO L192 MainTranslator]: Completed translation [2019-11-16 00:37:36,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:36 WrapperNode [2019-11-16 00:37:36,794 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-16 00:37:36,795 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-16 00:37:36,795 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-16 00:37:36,795 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-16 00:37:36,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:36" (1/1) ... [2019-11-16 00:37:36,823 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:36" (1/1) ... [2019-11-16 00:37:36,847 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-16 00:37:36,847 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-16 00:37:36,847 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-16 00:37:36,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-16 00:37:36,854 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:36" (1/1) ... [2019-11-16 00:37:36,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:36" (1/1) ... [2019-11-16 00:37:36,859 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:36" (1/1) ... [2019-11-16 00:37:36,859 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:36" (1/1) ... [2019-11-16 00:37:36,872 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:36" (1/1) ... [2019-11-16 00:37:36,877 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:36" (1/1) ... [2019-11-16 00:37:36,880 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:36" (1/1) ... [2019-11-16 00:37:36,895 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-16 00:37:36,896 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-16 00:37:36,896 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-16 00:37:36,896 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-16 00:37:36,897 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:36" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0b7b8702-5782-4891-bb27-f1526c6fc8e2/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-16 00:37:36,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-16 00:37:36,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-16 00:37:36,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-16 00:37:36,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-16 00:37:36,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-16 00:37:36,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-16 00:37:36,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-16 00:37:36,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-16 00:37:36,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-16 00:37:37,439 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-16 00:37:37,439 INFO L284 CfgBuilder]: Removed 20 assume(true) statements. [2019-11-16 00:37:37,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:37:37 BoogieIcfgContainer [2019-11-16 00:37:37,441 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-16 00:37:37,442 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-16 00:37:37,442 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-16 00:37:37,445 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-16 00:37:37,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:37:36" (1/3) ... [2019-11-16 00:37:37,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c112331 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:37:37, skipping insertion in model container [2019-11-16 00:37:37,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:36" (2/3) ... [2019-11-16 00:37:37,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c112331 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:37:37, skipping insertion in model container [2019-11-16 00:37:37,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:37:37" (3/3) ... [2019-11-16 00:37:37,450 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2c_remove_all_reverse.i [2019-11-16 00:37:37,459 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-16 00:37:37,466 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-16 00:37:37,476 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-16 00:37:37,503 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-16 00:37:37,503 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-16 00:37:37,503 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-16 00:37:37,503 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-16 00:37:37,503 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-16 00:37:37,503 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-16 00:37:37,504 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-16 00:37:37,504 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-16 00:37:37,517 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-11-16 00:37:37,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-16 00:37:37,526 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:37:37,527 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:37:37,529 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:37:37,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:37:37,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1936331042, now seen corresponding path program 1 times [2019-11-16 00:37:37,545 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-16 00:37:37,545 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1729465554] [2019-11-16 00:37:37,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0b7b8702-5782-4891-bb27-f1526c6fc8e2/bin/uautomizer/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-16 00:37:37,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:37:37,692 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-16 00:37:37,699 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:37:37,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:37:37,718 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-16 00:37:37,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:37:37,727 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1729465554] [2019-11-16 00:37:37,728 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:37:37,728 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-16 00:37:37,729 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339227951] [2019-11-16 00:37:37,738 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-16 00:37:37,738 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-16 00:37:37,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-16 00:37:37,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-16 00:37:37,756 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2019-11-16 00:37:37,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:37:37,782 INFO L93 Difference]: Finished difference Result 47 states and 65 transitions. [2019-11-16 00:37:37,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-16 00:37:37,785 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2019-11-16 00:37:37,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:37:37,800 INFO L225 Difference]: With dead ends: 47 [2019-11-16 00:37:37,801 INFO L226 Difference]: Without dead ends: 24 [2019-11-16 00:37:37,806 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-16 00:37:37,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-16 00:37:37,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-16 00:37:37,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-16 00:37:37,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-11-16 00:37:37,848 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 12 [2019-11-16 00:37:37,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:37:37,849 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-11-16 00:37:37,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-16 00:37:37,850 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-11-16 00:37:37,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-16 00:37:37,851 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:37:37,851 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:37:38,052 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-16 00:37:38,053 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:37:38,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:37:38,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1899977540, now seen corresponding path program 1 times [2019-11-16 00:37:38,057 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-16 00:37:38,057 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1349154371] [2019-11-16 00:37:38,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0b7b8702-5782-4891-bb27-f1526c6fc8e2/bin/uautomizer/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-16 00:37:38,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:37:38,172 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-16 00:37:38,173 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:37:38,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:37:38,200 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-16 00:37:38,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:37:38,224 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1349154371] [2019-11-16 00:37:38,224 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:37:38,225 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-16 00:37:38,225 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427040815] [2019-11-16 00:37:38,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-16 00:37:38,228 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-16 00:37:38,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-16 00:37:38,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-16 00:37:38,231 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 4 states. [2019-11-16 00:37:38,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:37:38,273 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2019-11-16 00:37:38,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-16 00:37:38,274 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-11-16 00:37:38,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:37:38,275 INFO L225 Difference]: With dead ends: 43 [2019-11-16 00:37:38,275 INFO L226 Difference]: Without dead ends: 28 [2019-11-16 00:37:38,276 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-16 00:37:38,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-16 00:37:38,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2019-11-16 00:37:38,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-16 00:37:38,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-11-16 00:37:38,282 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 12 [2019-11-16 00:37:38,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:37:38,282 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-11-16 00:37:38,282 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-16 00:37:38,283 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-11-16 00:37:38,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-16 00:37:38,283 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:37:38,284 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:37:38,500 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-16 00:37:38,501 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:37:38,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:37:38,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1177934452, now seen corresponding path program 1 times [2019-11-16 00:37:38,502 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-16 00:37:38,502 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1819445987] [2019-11-16 00:37:38,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0b7b8702-5782-4891-bb27-f1526c6fc8e2/bin/uautomizer/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-16 00:37:38,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:37:38,670 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-16 00:37:38,671 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:37:38,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-16 00:37:38,694 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-16 00:37:38,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-16 00:37:38,725 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1819445987] [2019-11-16 00:37:38,725 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:37:38,725 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-16 00:37:38,726 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25780468] [2019-11-16 00:37:38,726 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-16 00:37:38,726 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-16 00:37:38,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-16 00:37:38,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-16 00:37:38,727 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 6 states. [2019-11-16 00:37:38,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:37:38,806 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2019-11-16 00:37:38,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-16 00:37:38,808 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-11-16 00:37:38,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:37:38,809 INFO L225 Difference]: With dead ends: 39 [2019-11-16 00:37:38,809 INFO L226 Difference]: Without dead ends: 35 [2019-11-16 00:37:38,810 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-16 00:37:38,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-16 00:37:38,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-16 00:37:38,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-16 00:37:38,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2019-11-16 00:37:38,825 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 16 [2019-11-16 00:37:38,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:37:38,826 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2019-11-16 00:37:38,826 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-16 00:37:38,826 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2019-11-16 00:37:38,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-16 00:37:38,828 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:37:38,828 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:37:39,030 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-16 00:37:39,031 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:37:39,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:37:39,031 INFO L82 PathProgramCache]: Analyzing trace with hash 540636464, now seen corresponding path program 1 times [2019-11-16 00:37:39,032 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-16 00:37:39,032 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1908327317] [2019-11-16 00:37:39,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0b7b8702-5782-4891-bb27-f1526c6fc8e2/bin/uautomizer/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-16 00:37:39,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:37:39,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-16 00:37:39,263 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:37:39,331 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-16 00:37:39,332 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:37:39,352 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:37:39,357 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-16 00:37:39,358 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-16 00:37:39,368 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:37:39,368 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:37:39,369 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-11-16 00:37:39,405 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-16 00:37:39,406 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:37:39,415 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:37:39,418 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-16 00:37:39,419 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-16 00:37:39,425 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:37:39,425 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:37:39,425 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2019-11-16 00:37:39,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-16 00:37:39,443 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-16 00:37:39,489 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2019-11-16 00:37:39,490 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-16 00:37:39,519 INFO L567 ElimStorePlain]: treesize reduction 15, result has 31.8 percent of original size [2019-11-16 00:37:39,520 INFO L464 ElimStorePlain]: Eliminatee |#memory_$Pointer$.offset| vanished before elimination [2019-11-16 00:37:39,520 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-11-16 00:37:39,520 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:7 [2019-11-16 00:37:39,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-16 00:37:39,554 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1908327317] [2019-11-16 00:37:39,554 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:37:39,555 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 8 [2019-11-16 00:37:39,555 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551759643] [2019-11-16 00:37:39,556 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-16 00:37:39,556 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-16 00:37:39,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-16 00:37:39,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-16 00:37:39,557 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand 8 states. [2019-11-16 00:37:39,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:37:39,935 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2019-11-16 00:37:39,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-16 00:37:39,936 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2019-11-16 00:37:39,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:37:39,937 INFO L225 Difference]: With dead ends: 50 [2019-11-16 00:37:39,937 INFO L226 Difference]: Without dead ends: 35 [2019-11-16 00:37:39,938 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-16 00:37:39,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-16 00:37:39,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-16 00:37:39,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-16 00:37:39,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2019-11-16 00:37:39,946 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 28 [2019-11-16 00:37:39,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:37:39,947 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2019-11-16 00:37:39,947 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-16 00:37:39,947 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2019-11-16 00:37:39,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-16 00:37:39,949 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:37:39,949 INFO L380 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] [2019-11-16 00:37:40,152 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-16 00:37:40,152 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:37:40,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:37:40,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1510744236, now seen corresponding path program 1 times [2019-11-16 00:37:40,153 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-16 00:37:40,154 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [410953259] [2019-11-16 00:37:40,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0b7b8702-5782-4891-bb27-f1526c6fc8e2/bin/uautomizer/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-16 00:37:40,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:37:40,381 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-16 00:37:40,383 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:37:40,412 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-16 00:37:40,413 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:37:40,426 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:37:40,432 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-16 00:37:40,432 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-16 00:37:40,439 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:37:40,439 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:37:40,440 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:29, output treesize:7 [2019-11-16 00:37:40,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-16 00:37:40,456 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-16 00:37:40,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-16 00:37:40,463 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [410953259] [2019-11-16 00:37:40,463 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:37:40,463 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-16 00:37:40,464 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560244250] [2019-11-16 00:37:40,464 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-16 00:37:40,465 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-16 00:37:40,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-16 00:37:40,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-16 00:37:40,465 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 4 states. [2019-11-16 00:37:40,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:37:40,599 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2019-11-16 00:37:40,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-16 00:37:40,600 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2019-11-16 00:37:40,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:37:40,600 INFO L225 Difference]: With dead ends: 61 [2019-11-16 00:37:40,601 INFO L226 Difference]: Without dead ends: 39 [2019-11-16 00:37:40,601 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-16 00:37:40,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-16 00:37:40,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-16 00:37:40,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-16 00:37:40,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2019-11-16 00:37:40,609 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 34 [2019-11-16 00:37:40,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:37:40,609 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2019-11-16 00:37:40,610 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-16 00:37:40,610 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2019-11-16 00:37:40,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-16 00:37:40,611 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:37:40,611 INFO L380 BasicCegarLoop]: trace histogram [4, 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] [2019-11-16 00:37:40,814 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-16 00:37:40,814 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:37:40,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:37:40,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1000837620, now seen corresponding path program 1 times [2019-11-16 00:37:40,815 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-16 00:37:40,815 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2085807690] [2019-11-16 00:37:40,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0b7b8702-5782-4891-bb27-f1526c6fc8e2/bin/uautomizer/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-16 00:37:41,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:37:41,131 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-16 00:37:41,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:37:41,437 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:37:41,501 INFO L341 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2019-11-16 00:37:41,501 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 67 [2019-11-16 00:37:41,503 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:37:41,556 INFO L341 Elim1Store]: treesize reduction 32, result has 42.9 percent of original size [2019-11-16 00:37:41,556 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 85 treesize of output 71 [2019-11-16 00:37:41,558 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:37:41,558 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-16 00:37:41,605 INFO L567 ElimStorePlain]: treesize reduction 66, result has 44.5 percent of original size [2019-11-16 00:37:41,625 INFO L341 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2019-11-16 00:37:41,625 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 29 [2019-11-16 00:37:41,627 INFO L496 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-16 00:37:41,644 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:37:41,645 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-16 00:37:41,645 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:171, output treesize:48 [2019-11-16 00:37:41,962 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-16 00:37:41,962 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-16 00:37:42,592 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-16 00:37:42,594 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2085807690] [2019-11-16 00:37:42,594 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:37:42,594 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 23 [2019-11-16 00:37:42,594 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312796293] [2019-11-16 00:37:42,596 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-16 00:37:42,596 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-16 00:37:42,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-16 00:37:42,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2019-11-16 00:37:42,597 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 23 states. [2019-11-16 00:37:43,656 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2019-11-16 00:37:44,354 WARN L191 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2019-11-16 00:37:45,424 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2019-11-16 00:37:45,576 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 46 [2019-11-16 00:37:45,748 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2019-11-16 00:37:46,341 WARN L191 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2019-11-16 00:37:46,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:37:46,495 INFO L93 Difference]: Finished difference Result 128 states and 148 transitions. [2019-11-16 00:37:46,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-16 00:37:46,496 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 38 [2019-11-16 00:37:46,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:37:46,498 INFO L225 Difference]: With dead ends: 128 [2019-11-16 00:37:46,498 INFO L226 Difference]: Without dead ends: 95 [2019-11-16 00:37:46,499 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=464, Invalid=1342, Unknown=0, NotChecked=0, Total=1806 [2019-11-16 00:37:46,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-11-16 00:37:46,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 46. [2019-11-16 00:37:46,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-16 00:37:46,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2019-11-16 00:37:46,511 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 38 [2019-11-16 00:37:46,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:37:46,512 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2019-11-16 00:37:46,512 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-16 00:37:46,512 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2019-11-16 00:37:46,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-16 00:37:46,515 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:37:46,516 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 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] [2019-11-16 00:37:46,719 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-16 00:37:46,720 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:37:46,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:37:46,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1937161681, now seen corresponding path program 1 times [2019-11-16 00:37:46,720 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-16 00:37:46,720 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1371244767] [2019-11-16 00:37:46,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0b7b8702-5782-4891-bb27-f1526c6fc8e2/bin/uautomizer/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-16 00:37:46,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:37:46,968 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-16 00:37:46,971 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:37:47,057 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:37:47,057 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 48 [2019-11-16 00:37:47,058 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:37:47,059 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:37:47,060 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-16 00:37:47,081 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:37:47,282 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-16 00:37:47,283 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: expected NNF at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:236) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive$TermWalker.walk(NonRecursive.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:195) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder.(ArrayOccurrenceAnalysis.java:181) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.(ArrayOccurrenceAnalysis.java:74) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:275) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:253) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:245) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:292) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.checkFeasibility(TraceAbstractionRefinementEngine.java:244) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:160) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-16 00:37:47,287 INFO L168 Benchmark]: Toolchain (without parser) took 11040.35 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 219.2 MB). Free memory was 947.0 MB in the beginning and 870.3 MB in the end (delta: 76.7 MB). Peak memory consumption was 295.8 MB. Max. memory is 11.5 GB. [2019-11-16 00:37:47,287 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-16 00:37:47,288 INFO L168 Benchmark]: CACSL2BoogieTranslator took 547.22 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 161.0 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -189.9 MB). Peak memory consumption was 29.3 MB. Max. memory is 11.5 GB. [2019-11-16 00:37:47,289 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.36 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-16 00:37:47,289 INFO L168 Benchmark]: Boogie Preprocessor took 48.56 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: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 11.5 GB. [2019-11-16 00:37:47,290 INFO L168 Benchmark]: RCFGBuilder took 544.69 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 30.7 MB). Peak memory consumption was 30.7 MB. Max. memory is 11.5 GB. [2019-11-16 00:37:47,291 INFO L168 Benchmark]: TraceAbstraction took 9844.11 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 58.2 MB). Free memory was 1.1 GB in the beginning and 870.3 MB in the end (delta: 229.3 MB). Peak memory consumption was 287.5 MB. Max. memory is 11.5 GB. [2019-11-16 00:37:47,295 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 547.22 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 161.0 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -189.9 MB). Peak memory consumption was 29.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 52.36 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 48.56 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 11.5 GB. * RCFGBuilder took 544.69 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 30.7 MB). Peak memory consumption was 30.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 9844.11 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 58.2 MB). Free memory was 1.1 GB in the beginning and 870.3 MB in the end (delta: 229.3 MB). Peak memory consumption was 287.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: UnsupportedOperationException: expected NNF de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: expected NNF: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:236) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...