./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i -s /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 04d17eda3d030bee53a60ea5a86a683be82674c1 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i -s /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 04d17eda3d030bee53a60ea5a86a683be82674c1 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: UnsupportedOperationException: expected NNF --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 08:57:21,381 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 08:57:21,383 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 08:57:21,394 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 08:57:21,394 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 08:57:21,395 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 08:57:21,396 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 08:57:21,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 08:57:21,400 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 08:57:21,400 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 08:57:21,401 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 08:57:21,402 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 08:57:21,403 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 08:57:21,404 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 08:57:21,404 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 08:57:21,405 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 08:57:21,406 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 08:57:21,407 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 08:57:21,408 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 08:57:21,410 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 08:57:21,411 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 08:57:21,412 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 08:57:21,413 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 08:57:21,414 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 08:57:21,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 08:57:21,416 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 08:57:21,416 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 08:57:21,417 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 08:57:21,418 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 08:57:21,419 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 08:57:21,419 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 08:57:21,420 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 08:57:21,420 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 08:57:21,421 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 08:57:21,423 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 08:57:21,429 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 08:57:21,430 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 08:57:21,430 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 08:57:21,430 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 08:57:21,431 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 08:57:21,431 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 08:57:21,432 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-22 08:57:21,451 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 08:57:21,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 08:57:21,455 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 08:57:21,455 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 08:57:21,455 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 08:57:21,456 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 08:57:21,456 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 08:57:21,456 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 08:57:21,456 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 08:57:21,457 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 08:57:21,457 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 08:57:21,457 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 08:57:21,458 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 08:57:21,458 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 08:57:21,458 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 08:57:21,458 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 08:57:21,458 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 08:57:21,459 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 08:57:21,459 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 08:57:21,459 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 08:57:21,459 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 08:57:21,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:57:21,460 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 08:57:21,460 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 08:57:21,460 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 08:57:21,461 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 08:57:21,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 08:57:21,461 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 08:57:21,461 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 04d17eda3d030bee53a60ea5a86a683be82674c1 [2019-10-22 08:57:21,495 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 08:57:21,507 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 08:57:21,513 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 08:57:21,517 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 08:57:21,518 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 08:57:21,518 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/bin/uautomizer/../../sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i [2019-10-22 08:57:21,575 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/bin/uautomizer/data/1a1b9b85e/6ba65db1869c42f28bd1e8b4cdf7e474/FLAG19df319ee [2019-10-22 08:57:22,051 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 08:57:22,051 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i [2019-10-22 08:57:22,064 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/bin/uautomizer/data/1a1b9b85e/6ba65db1869c42f28bd1e8b4cdf7e474/FLAG19df319ee [2019-10-22 08:57:22,543 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/bin/uautomizer/data/1a1b9b85e/6ba65db1869c42f28bd1e8b4cdf7e474 [2019-10-22 08:57:22,546 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 08:57:22,547 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 08:57:22,548 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 08:57:22,549 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 08:57:22,552 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 08:57:22,554 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:57:22" (1/1) ... [2019-10-22 08:57:22,557 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ba2d5c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:22, skipping insertion in model container [2019-10-22 08:57:22,557 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:57:22" (1/1) ... [2019-10-22 08:57:22,567 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 08:57:22,612 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 08:57:22,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:57:22,984 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 08:57:23,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:57:23,085 INFO L192 MainTranslator]: Completed translation [2019-10-22 08:57:23,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:23 WrapperNode [2019-10-22 08:57:23,086 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 08:57:23,087 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 08:57:23,087 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 08:57:23,087 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 08:57:23,095 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:23" (1/1) ... [2019-10-22 08:57:23,108 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:23" (1/1) ... [2019-10-22 08:57:23,127 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 08:57:23,128 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 08:57:23,128 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 08:57:23,128 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 08:57:23,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:23" (1/1) ... [2019-10-22 08:57:23,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:23" (1/1) ... [2019-10-22 08:57:23,140 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:23" (1/1) ... [2019-10-22 08:57:23,141 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:23" (1/1) ... [2019-10-22 08:57:23,147 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:23" (1/1) ... [2019-10-22 08:57:23,151 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:23" (1/1) ... [2019-10-22 08:57:23,152 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:23" (1/1) ... [2019-10-22 08:57:23,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 08:57:23,155 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 08:57:23,155 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 08:57:23,155 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 08:57:23,156 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:23" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:57:23,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-22 08:57:23,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-22 08:57:23,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-22 08:57:23,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-22 08:57:23,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-22 08:57:23,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 08:57:23,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-10-22 08:57:23,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 08:57:23,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 08:57:23,479 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 08:57:23,479 INFO L284 CfgBuilder]: Removed 13 assume(true) statements. [2019-10-22 08:57:23,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:57:23 BoogieIcfgContainer [2019-10-22 08:57:23,481 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 08:57:23,481 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 08:57:23,482 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 08:57:23,484 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 08:57:23,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 08:57:22" (1/3) ... [2019-10-22 08:57:23,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@402c5b01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:57:23, skipping insertion in model container [2019-10-22 08:57:23,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:23" (2/3) ... [2019-10-22 08:57:23,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@402c5b01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:57:23, skipping insertion in model container [2019-10-22 08:57:23,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:57:23" (3/3) ... [2019-10-22 08:57:23,487 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2n_remove_all_reverse.i [2019-10-22 08:57:23,495 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 08:57:23,501 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 08:57:23,510 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 08:57:23,529 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 08:57:23,529 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 08:57:23,529 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 08:57:23,529 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 08:57:23,529 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 08:57:23,529 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 08:57:23,529 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 08:57:23,529 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 08:57:23,541 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-22 08:57:23,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 08:57:23,547 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:23,547 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:23,549 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:23,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:23,554 INFO L82 PathProgramCache]: Analyzing trace with hash -717862130, now seen corresponding path program 1 times [2019-10-22 08:57:23,560 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:23,560 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325908614] [2019-10-22 08:57:23,561 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:23,561 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:23,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:23,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:23,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:23,654 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325908614] [2019-10-22 08:57:23,655 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:23,655 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 08:57:23,655 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067775836] [2019-10-22 08:57:23,659 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 08:57:23,659 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:23,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 08:57:23,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 08:57:23,671 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2019-10-22 08:57:23,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:23,683 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2019-10-22 08:57:23,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 08:57:23,684 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-10-22 08:57:23,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:23,691 INFO L225 Difference]: With dead ends: 38 [2019-10-22 08:57:23,691 INFO L226 Difference]: Without dead ends: 19 [2019-10-22 08:57:23,693 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 08:57:23,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-22 08:57:23,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-22 08:57:23,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-22 08:57:23,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2019-10-22 08:57:23,721 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2019-10-22 08:57:23,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:23,721 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2019-10-22 08:57:23,721 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 08:57:23,721 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2019-10-22 08:57:23,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 08:57:23,722 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:23,722 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:23,722 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:23,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:23,722 INFO L82 PathProgramCache]: Analyzing trace with hash -718636696, now seen corresponding path program 1 times [2019-10-22 08:57:23,723 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:23,723 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931778669] [2019-10-22 08:57:23,723 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:23,723 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:23,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:23,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:23,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:23,762 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931778669] [2019-10-22 08:57:23,762 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:23,762 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 08:57:23,762 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49717608] [2019-10-22 08:57:23,764 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 08:57:23,764 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:23,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 08:57:23,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 08:57:23,764 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 3 states. [2019-10-22 08:57:23,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:23,778 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2019-10-22 08:57:23,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 08:57:23,779 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-10-22 08:57:23,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:23,779 INFO L225 Difference]: With dead ends: 36 [2019-10-22 08:57:23,779 INFO L226 Difference]: Without dead ends: 24 [2019-10-22 08:57:23,780 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 08:57:23,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-22 08:57:23,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2019-10-22 08:57:23,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-22 08:57:23,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-10-22 08:57:23,787 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 9 [2019-10-22 08:57:23,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:23,788 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-10-22 08:57:23,788 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 08:57:23,788 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-10-22 08:57:23,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-22 08:57:23,788 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:23,788 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:23,789 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:23,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:23,789 INFO L82 PathProgramCache]: Analyzing trace with hash -335176259, now seen corresponding path program 1 times [2019-10-22 08:57:23,789 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:23,789 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555701480] [2019-10-22 08:57:23,789 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:23,790 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:23,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:23,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:23,846 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555701480] [2019-10-22 08:57:23,846 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:23,846 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 08:57:23,846 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320469061] [2019-10-22 08:57:23,846 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 08:57:23,847 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:23,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 08:57:23,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 08:57:23,847 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2019-10-22 08:57:23,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:23,885 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2019-10-22 08:57:23,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 08:57:23,887 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-22 08:57:23,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:23,887 INFO L225 Difference]: With dead ends: 41 [2019-10-22 08:57:23,888 INFO L226 Difference]: Without dead ends: 24 [2019-10-22 08:57:23,888 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 08:57:23,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-22 08:57:23,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-10-22 08:57:23,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-22 08:57:23,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-10-22 08:57:23,891 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2019-10-22 08:57:23,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:23,891 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-10-22 08:57:23,892 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 08:57:23,892 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-10-22 08:57:23,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-22 08:57:23,892 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:23,892 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:23,892 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:23,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:23,893 INFO L82 PathProgramCache]: Analyzing trace with hash 344882111, now seen corresponding path program 1 times [2019-10-22 08:57:23,893 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:23,893 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165698884] [2019-10-22 08:57:23,893 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:23,893 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:23,893 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:23,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:23,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:23,986 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165698884] [2019-10-22 08:57:23,986 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77451536] [2019-10-22 08:57:23,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:57:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:24,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-22 08:57:24,060 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:24,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:24,086 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:57:24,086 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-10-22 08:57:24,086 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886222758] [2019-10-22 08:57:24,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 08:57:24,087 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:24,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 08:57:24,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-22 08:57:24,087 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2019-10-22 08:57:24,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:24,116 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2019-10-22 08:57:24,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 08:57:24,117 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-10-22 08:57:24,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:24,118 INFO L225 Difference]: With dead ends: 37 [2019-10-22 08:57:24,118 INFO L226 Difference]: Without dead ends: 25 [2019-10-22 08:57:24,119 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-22 08:57:24,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-22 08:57:24,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-22 08:57:24,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-22 08:57:24,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-10-22 08:57:24,125 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 14 [2019-10-22 08:57:24,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:24,125 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-10-22 08:57:24,125 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 08:57:24,125 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-10-22 08:57:24,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-22 08:57:24,126 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:24,126 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:24,328 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:57:24,328 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:24,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:24,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1454868026, now seen corresponding path program 1 times [2019-10-22 08:57:24,329 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:24,329 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316475442] [2019-10-22 08:57:24,329 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:24,329 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:24,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:24,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:24,419 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 08:57:24,419 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316475442] [2019-10-22 08:57:24,419 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243941533] [2019-10-22 08:57:24,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:57:24,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:24,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 08:57:24,477 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:24,481 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-22 08:57:24,481 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-22 08:57:24,481 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2019-10-22 08:57:24,481 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993380912] [2019-10-22 08:57:24,482 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 08:57:24,482 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:24,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 08:57:24,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-22 08:57:24,482 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 4 states. [2019-10-22 08:57:24,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:24,506 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2019-10-22 08:57:24,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 08:57:24,506 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-10-22 08:57:24,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:24,507 INFO L225 Difference]: With dead ends: 35 [2019-10-22 08:57:24,507 INFO L226 Difference]: Without dead ends: 31 [2019-10-22 08:57:24,508 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-22 08:57:24,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-22 08:57:24,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2019-10-22 08:57:24,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-22 08:57:24,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-10-22 08:57:24,511 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 19 [2019-10-22 08:57:24,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:24,512 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-10-22 08:57:24,512 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 08:57:24,512 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-10-22 08:57:24,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-22 08:57:24,512 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:24,513 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:24,713 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:57:24,713 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:24,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:24,714 INFO L82 PathProgramCache]: Analyzing trace with hash -349283435, now seen corresponding path program 1 times [2019-10-22 08:57:24,714 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:24,714 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634377942] [2019-10-22 08:57:24,714 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:24,714 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:24,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:24,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:24,816 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 08:57:24,817 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634377942] [2019-10-22 08:57:24,817 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396541075] [2019-10-22 08:57:24,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/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 [2019-10-22 08:57:24,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:24,887 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 08:57:24,888 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:24,893 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-22 08:57:24,897 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:57:24,898 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2019-10-22 08:57:24,898 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399489173] [2019-10-22 08:57:24,905 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 08:57:24,905 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:24,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 08:57:24,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 08:57:24,905 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 6 states. [2019-10-22 08:57:24,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:24,968 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2019-10-22 08:57:24,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 08:57:24,968 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2019-10-22 08:57:24,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:24,969 INFO L225 Difference]: With dead ends: 36 [2019-10-22 08:57:24,969 INFO L226 Difference]: Without dead ends: 32 [2019-10-22 08:57:24,970 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-22 08:57:24,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-22 08:57:24,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-22 08:57:24,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-22 08:57:24,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2019-10-22 08:57:24,973 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 22 [2019-10-22 08:57:24,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:24,974 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2019-10-22 08:57:24,974 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 08:57:24,974 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2019-10-22 08:57:24,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-22 08:57:24,975 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:24,975 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:25,175 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:57:25,176 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:25,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:25,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1982925978, now seen corresponding path program 2 times [2019-10-22 08:57:25,176 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:25,176 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593979069] [2019-10-22 08:57:25,176 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:25,177 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:25,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:25,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:25,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-22 08:57:25,251 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593979069] [2019-10-22 08:57:25,251 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:25,251 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 08:57:25,251 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160966543] [2019-10-22 08:57:25,252 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 08:57:25,252 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:25,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 08:57:25,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 08:57:25,253 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 5 states. [2019-10-22 08:57:25,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:25,335 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2019-10-22 08:57:25,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:57:25,335 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2019-10-22 08:57:25,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:25,336 INFO L225 Difference]: With dead ends: 44 [2019-10-22 08:57:25,336 INFO L226 Difference]: Without dead ends: 32 [2019-10-22 08:57:25,336 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-22 08:57:25,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-22 08:57:25,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-22 08:57:25,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-22 08:57:25,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-10-22 08:57:25,341 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 25 [2019-10-22 08:57:25,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:25,341 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-10-22 08:57:25,341 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 08:57:25,341 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-10-22 08:57:25,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-22 08:57:25,342 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:25,342 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:25,342 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:25,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:25,343 INFO L82 PathProgramCache]: Analyzing trace with hash 432541788, now seen corresponding path program 1 times [2019-10-22 08:57:25,343 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:25,343 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633908733] [2019-10-22 08:57:25,343 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:25,343 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:25,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:25,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:25,833 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 08:57:25,834 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633908733] [2019-10-22 08:57:25,834 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987283279] [2019-10-22 08:57:25,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/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 [2019-10-22 08:57:25,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:25,924 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 58 conjunts are in the unsatisfiable core [2019-10-22 08:57:25,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:26,138 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2019-10-22 08:57:26,139 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 08:57:26,147 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 08:57:26,148 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. [2019-10-22 08:57:26,148 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:24 [2019-10-22 08:57:26,361 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:57:26,376 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-22 08:57:26,377 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 08:57:26,378 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 60 [2019-10-22 08:57:26,379 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-22 08:57:26,416 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 08:57:26,422 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-22 08:57:26,423 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 08:57:26,423 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 50 [2019-10-22 08:57:26,425 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-22 08:57:26,461 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 08:57:26,462 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2019-10-22 08:57:26,462 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:159, output treesize:99 [2019-10-22 08:57:26,568 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 08:57:26,568 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-22 08:57:26,568 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [14] total 24 [2019-10-22 08:57:26,569 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920954442] [2019-10-22 08:57:26,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-22 08:57:26,569 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:26,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-22 08:57:26,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2019-10-22 08:57:26,570 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 12 states. [2019-10-22 08:57:27,085 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2019-10-22 08:57:27,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:27,142 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2019-10-22 08:57:27,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-22 08:57:27,145 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2019-10-22 08:57:27,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:27,146 INFO L225 Difference]: With dead ends: 68 [2019-10-22 08:57:27,146 INFO L226 Difference]: Without dead ends: 58 [2019-10-22 08:57:27,147 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2019-10-22 08:57:27,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-22 08:57:27,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2019-10-22 08:57:27,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-22 08:57:27,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2019-10-22 08:57:27,154 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 31 [2019-10-22 08:57:27,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:27,154 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2019-10-22 08:57:27,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-22 08:57:27,154 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2019-10-22 08:57:27,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-22 08:57:27,155 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:27,155 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:27,355 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:57:27,356 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:27,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:27,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1860510687, now seen corresponding path program 1 times [2019-10-22 08:57:27,356 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:27,356 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421564851] [2019-10-22 08:57:27,356 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:27,356 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:27,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:27,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:27,662 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-22 08:57:27,662 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421564851] [2019-10-22 08:57:27,663 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003811306] [2019-10-22 08:57:27,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:57:27,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:27,737 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 73 conjunts are in the unsatisfiable core [2019-10-22 08:57:27,739 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:28,020 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-22 08:57:28,033 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 08:57:28,033 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 92 [2019-10-22 08:57:28,034 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 08:57:28,064 INFO L567 ElimStorePlain]: treesize reduction 40, result has 63.0 percent of original size [2019-10-22 08:57:28,078 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 08:57:28,079 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 70 [2019-10-22 08:57:28,079 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-22 08:57:28,110 INFO L567 ElimStorePlain]: treesize reduction 40, result has 61.5 percent of original size [2019-10-22 08:57:28,110 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-22 08:57:28,111 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:84, output treesize:64 [2019-10-22 08:57:28,349 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 08:57:28,349 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:57:28,349 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2019-10-22 08:57:28,349 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723015239] [2019-10-22 08:57:28,350 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-22 08:57:28,350 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:28,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-22 08:57:28,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2019-10-22 08:57:28,351 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 27 states. [2019-10-22 08:57:29,172 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 69 [2019-10-22 08:57:29,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:29,319 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2019-10-22 08:57:29,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-22 08:57:29,322 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 33 [2019-10-22 08:57:29,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:29,323 INFO L225 Difference]: With dead ends: 87 [2019-10-22 08:57:29,323 INFO L226 Difference]: Without dead ends: 44 [2019-10-22 08:57:29,324 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=282, Invalid=1050, Unknown=0, NotChecked=0, Total=1332 [2019-10-22 08:57:29,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-22 08:57:29,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-10-22 08:57:29,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-22 08:57:29,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2019-10-22 08:57:29,339 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 33 [2019-10-22 08:57:29,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:29,339 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2019-10-22 08:57:29,339 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-22 08:57:29,339 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2019-10-22 08:57:29,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-22 08:57:29,340 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:29,340 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:29,542 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:57:29,543 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:29,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:29,543 INFO L82 PathProgramCache]: Analyzing trace with hash 289325857, now seen corresponding path program 2 times [2019-10-22 08:57:29,543 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:29,543 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925709594] [2019-10-22 08:57:29,543 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:29,543 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:29,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:29,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:29,776 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 08:57:29,776 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925709594] [2019-10-22 08:57:29,776 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785699] [2019-10-22 08:57:29,776 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:57:29,836 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 08:57:29,836 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:57:29,838 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 62 conjunts are in the unsatisfiable core [2019-10-22 08:57:29,840 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:30,032 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-22 08:57:30,033 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 46 [2019-10-22 08:57:30,034 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 08:57:30,046 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 08:57:30,049 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-22 08:57:30,049 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2019-10-22 08:57:30,050 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-22 08:57:30,057 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 08:57:30,058 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-22 08:57:30,058 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:74, output treesize:46 [2019-10-22 08:57:30,099 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-22 08:57:30,099 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-22 08:57:30,100 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 08:57:30,101 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 38 [2019-10-22 08:57:30,102 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-22 08:57:30,111 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 08:57:30,111 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-22 08:57:30,111 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:80, output treesize:43 [2019-10-22 08:57:30,146 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 08:57:30,146 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:57:30,146 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2019-10-22 08:57:30,146 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463545448] [2019-10-22 08:57:30,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-22 08:57:30,147 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:30,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-22 08:57:30,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2019-10-22 08:57:30,148 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 22 states. [2019-10-22 08:57:30,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:30,871 INFO L93 Difference]: Finished difference Result 87 states and 101 transitions. [2019-10-22 08:57:30,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-22 08:57:30,874 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 33 [2019-10-22 08:57:30,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:30,875 INFO L225 Difference]: With dead ends: 87 [2019-10-22 08:57:30,875 INFO L226 Difference]: Without dead ends: 61 [2019-10-22 08:57:30,875 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=326, Invalid=1006, Unknown=0, NotChecked=0, Total=1332 [2019-10-22 08:57:30,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-10-22 08:57:30,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2019-10-22 08:57:30,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-22 08:57:30,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2019-10-22 08:57:30,883 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 33 [2019-10-22 08:57:30,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:30,884 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2019-10-22 08:57:30,884 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-22 08:57:30,884 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2019-10-22 08:57:30,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-22 08:57:30,884 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:30,884 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:31,085 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:57:31,085 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:31,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:31,085 INFO L82 PathProgramCache]: Analyzing trace with hash 97769638, now seen corresponding path program 3 times [2019-10-22 08:57:31,086 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:31,086 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657787916] [2019-10-22 08:57:31,086 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:31,086 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:31,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:31,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:31,371 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-22 08:57:31,372 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657787916] [2019-10-22 08:57:31,372 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817207718] [2019-10-22 08:57:31,372 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:57:31,433 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-22 08:57:31,433 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:57:31,435 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-22 08:57:31,436 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:31,461 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:57:31,499 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:57:31,514 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 08:57:31,514 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 42 [2019-10-22 08:57:31,515 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:57:31,515 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:57:31,516 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-22 08:57:31,527 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 08:57:31,527 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 52 [2019-10-22 08:57:31,528 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:57:31,529 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:57:31,530 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-22 08:57:31,555 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 08:57:31,756 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:57:31,757 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 [2019-10-22 08:57:31,760 INFO L168 Benchmark]: Toolchain (without parser) took 9213.26 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 231.7 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -201.6 MB). Peak memory consumption was 30.1 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:31,761 INFO L168 Benchmark]: CDTParser took 0.34 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. [2019-10-22 08:57:31,761 INFO L168 Benchmark]: CACSL2BoogieTranslator took 538.21 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.7 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -175.7 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:31,761 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.73 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:31,762 INFO L168 Benchmark]: Boogie Preprocessor took 26.86 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:57:31,762 INFO L168 Benchmark]: RCFGBuilder took 325.84 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:31,762 INFO L168 Benchmark]: TraceAbstraction took 8277.94 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 87.0 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -59.1 MB). Peak memory consumption was 28.0 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:31,764 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 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 538.21 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.7 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -175.7 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 40.73 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 26.86 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 325.84 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 8277.94 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 87.0 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -59.1 MB). Peak memory consumption was 28.0 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 [2019-10-22 08:57:33,705 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 08:57:33,706 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 08:57:33,720 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 08:57:33,721 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 08:57:33,722 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 08:57:33,723 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 08:57:33,725 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 08:57:33,727 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 08:57:33,728 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 08:57:33,730 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 08:57:33,732 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 08:57:33,737 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 08:57:33,738 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 08:57:33,739 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 08:57:33,739 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 08:57:33,740 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 08:57:33,740 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 08:57:33,741 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 08:57:33,745 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 08:57:33,747 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 08:57:33,750 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 08:57:33,752 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 08:57:33,754 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 08:57:33,756 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 08:57:33,759 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 08:57:33,759 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 08:57:33,760 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 08:57:33,760 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 08:57:33,761 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 08:57:33,761 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 08:57:33,761 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 08:57:33,762 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 08:57:33,764 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 08:57:33,764 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 08:57:33,765 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 08:57:33,765 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 08:57:33,765 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 08:57:33,765 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 08:57:33,766 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 08:57:33,766 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 08:57:33,767 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-10-22 08:57:33,777 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 08:57:33,787 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 08:57:33,788 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 08:57:33,788 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 08:57:33,788 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 08:57:33,788 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 08:57:33,789 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 08:57:33,789 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 08:57:33,789 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 08:57:33,789 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 08:57:33,789 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 08:57:33,789 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 08:57:33,789 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-10-22 08:57:33,789 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-10-22 08:57:33,790 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 08:57:33,790 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 08:57:33,790 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 08:57:33,790 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 08:57:33,790 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 08:57:33,790 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 08:57:33,790 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 08:57:33,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 08:57:33,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:57:33,791 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 08:57:33,791 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 08:57:33,791 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 08:57:33,791 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-10-22 08:57:33,791 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-10-22 08:57:33,791 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 08:57:33,792 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 08:57:33,792 INFO L138 SettingsManager]: * Logic for external solver=AUFBV Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 04d17eda3d030bee53a60ea5a86a683be82674c1 [2019-10-22 08:57:33,825 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 08:57:33,837 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 08:57:33,841 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 08:57:33,843 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 08:57:33,845 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 08:57:33,846 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/bin/uautomizer/../../sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i [2019-10-22 08:57:33,889 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/bin/uautomizer/data/c3af95910/062124d3f5ee4530a4a7cbffd9baf7c9/FLAG5eb03c557 [2019-10-22 08:57:34,376 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 08:57:34,377 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/sv-benchmarks/c/list-simple/dll2n_remove_all_reverse.i [2019-10-22 08:57:34,386 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/bin/uautomizer/data/c3af95910/062124d3f5ee4530a4a7cbffd9baf7c9/FLAG5eb03c557 [2019-10-22 08:57:34,867 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/bin/uautomizer/data/c3af95910/062124d3f5ee4530a4a7cbffd9baf7c9 [2019-10-22 08:57:34,870 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 08:57:34,872 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 08:57:34,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 08:57:34,872 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 08:57:34,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 08:57:34,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:57:34" (1/1) ... [2019-10-22 08:57:34,879 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2219337d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:34, skipping insertion in model container [2019-10-22 08:57:34,879 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:57:34" (1/1) ... [2019-10-22 08:57:34,886 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 08:57:34,917 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 08:57:35,261 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:57:35,275 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 08:57:35,324 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:57:35,361 INFO L192 MainTranslator]: Completed translation [2019-10-22 08:57:35,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:35 WrapperNode [2019-10-22 08:57:35,361 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 08:57:35,362 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 08:57:35,362 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 08:57:35,362 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 08:57:35,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:35" (1/1) ... [2019-10-22 08:57:35,393 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:35" (1/1) ... [2019-10-22 08:57:35,412 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 08:57:35,413 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 08:57:35,413 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 08:57:35,413 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 08:57:35,421 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:35" (1/1) ... [2019-10-22 08:57:35,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:35" (1/1) ... [2019-10-22 08:57:35,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:35" (1/1) ... [2019-10-22 08:57:35,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:35" (1/1) ... [2019-10-22 08:57:35,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:35" (1/1) ... [2019-10-22 08:57:35,458 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:35" (1/1) ... [2019-10-22 08:57:35,460 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:35" (1/1) ... [2019-10-22 08:57:35,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 08:57:35,464 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 08:57:35,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 08:57:35,464 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 08:57:35,465 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:35" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:57:35,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-22 08:57:35,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-22 08:57:35,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-22 08:57:35,517 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-22 08:57:35,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 08:57:35,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-10-22 08:57:35,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-10-22 08:57:35,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 08:57:35,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 08:57:35,854 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 08:57:35,854 INFO L284 CfgBuilder]: Removed 13 assume(true) statements. [2019-10-22 08:57:35,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:57:35 BoogieIcfgContainer [2019-10-22 08:57:35,855 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 08:57:35,856 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 08:57:35,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 08:57:35,859 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 08:57:35,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 08:57:34" (1/3) ... [2019-10-22 08:57:35,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43b63aa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:57:35, skipping insertion in model container [2019-10-22 08:57:35,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:35" (2/3) ... [2019-10-22 08:57:35,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43b63aa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:57:35, skipping insertion in model container [2019-10-22 08:57:35,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:57:35" (3/3) ... [2019-10-22 08:57:35,862 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2n_remove_all_reverse.i [2019-10-22 08:57:35,870 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 08:57:35,877 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 08:57:35,886 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 08:57:35,906 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 08:57:35,906 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 08:57:35,906 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 08:57:35,906 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 08:57:35,906 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 08:57:35,906 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 08:57:35,906 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 08:57:35,907 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 08:57:35,918 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-22 08:57:35,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 08:57:35,923 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:35,924 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:35,925 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:35,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:35,928 INFO L82 PathProgramCache]: Analyzing trace with hash -717862130, now seen corresponding path program 1 times [2019-10-22 08:57:35,935 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:57:35,935 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1684323895] [2019-10-22 08:57:35,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/bin/uautomizer/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 08:57:36,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:36,021 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-22 08:57:36,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:36,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:36,037 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:57:36,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:36,041 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1684323895] [2019-10-22 08:57:36,041 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:36,042 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-10-22 08:57:36,042 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181072609] [2019-10-22 08:57:36,046 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 08:57:36,046 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:57:36,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 08:57:36,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 08:57:36,057 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2019-10-22 08:57:36,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:36,068 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2019-10-22 08:57:36,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 08:57:36,069 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-10-22 08:57:36,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:36,076 INFO L225 Difference]: With dead ends: 38 [2019-10-22 08:57:36,077 INFO L226 Difference]: Without dead ends: 19 [2019-10-22 08:57:36,079 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 08:57:36,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-22 08:57:36,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-22 08:57:36,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-22 08:57:36,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2019-10-22 08:57:36,107 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2019-10-22 08:57:36,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:36,107 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2019-10-22 08:57:36,107 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 08:57:36,107 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2019-10-22 08:57:36,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 08:57:36,108 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:36,108 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:36,308 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 08:57:36,309 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:36,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:36,309 INFO L82 PathProgramCache]: Analyzing trace with hash -718636696, now seen corresponding path program 1 times [2019-10-22 08:57:36,310 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:57:36,310 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1376156272] [2019-10-22 08:57:36,310 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/bin/uautomizer/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 08:57:36,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:36,388 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 08:57:36,389 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:36,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:36,411 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:57:36,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:36,428 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1376156272] [2019-10-22 08:57:36,428 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:36,428 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-10-22 08:57:36,428 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767715638] [2019-10-22 08:57:36,429 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 08:57:36,430 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:57:36,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 08:57:36,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:57:36,430 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 4 states. [2019-10-22 08:57:36,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:36,461 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2019-10-22 08:57:36,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 08:57:36,463 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-10-22 08:57:36,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:36,463 INFO L225 Difference]: With dead ends: 37 [2019-10-22 08:57:36,464 INFO L226 Difference]: Without dead ends: 25 [2019-10-22 08:57:36,464 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:57:36,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-22 08:57:36,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-22 08:57:36,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-22 08:57:36,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2019-10-22 08:57:36,469 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 9 [2019-10-22 08:57:36,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:36,470 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2019-10-22 08:57:36,470 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 08:57:36,470 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2019-10-22 08:57:36,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-22 08:57:36,471 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:36,471 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:36,671 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 08:57:36,672 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:36,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:36,672 INFO L82 PathProgramCache]: Analyzing trace with hash -443750776, now seen corresponding path program 1 times [2019-10-22 08:57:36,673 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:57:36,673 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [668323260] [2019-10-22 08:57:36,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/bin/uautomizer/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 08:57:36,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:36,767 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 08:57:36,768 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:36,786 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 08:57:36,787 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:57:36,791 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 08:57:36,791 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [668323260] [2019-10-22 08:57:36,793 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:36,793 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-10-22 08:57:36,793 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458311508] [2019-10-22 08:57:36,794 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 08:57:36,794 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:57:36,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 08:57:36,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 08:57:36,794 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 3 states. [2019-10-22 08:57:36,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:36,890 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2019-10-22 08:57:36,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 08:57:36,891 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-10-22 08:57:36,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:36,891 INFO L225 Difference]: With dead ends: 45 [2019-10-22 08:57:36,891 INFO L226 Difference]: Without dead ends: 26 [2019-10-22 08:57:36,892 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 08:57:36,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-22 08:57:36,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2019-10-22 08:57:36,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-22 08:57:36,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-10-22 08:57:36,896 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 19 [2019-10-22 08:57:36,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:36,896 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-10-22 08:57:36,897 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 08:57:36,897 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-10-22 08:57:36,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-22 08:57:36,897 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:36,897 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:37,098 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 08:57:37,099 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:37,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:37,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1454868026, now seen corresponding path program 1 times [2019-10-22 08:57:37,099 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:57:37,099 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1151013629] [2019-10-22 08:57:37,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/bin/uautomizer/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 08:57:37,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:37,213 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 08:57:37,214 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:37,236 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-22 08:57:37,237 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:57:37,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-22 08:57:37,262 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1151013629] [2019-10-22 08:57:37,264 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:37,264 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-22 08:57:37,265 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461193397] [2019-10-22 08:57:37,265 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 08:57:37,265 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:57:37,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 08:57:37,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 08:57:37,266 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 6 states. [2019-10-22 08:57:37,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:37,327 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2019-10-22 08:57:37,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:57:37,328 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-10-22 08:57:37,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:37,328 INFO L225 Difference]: With dead ends: 36 [2019-10-22 08:57:37,328 INFO L226 Difference]: Without dead ends: 32 [2019-10-22 08:57:37,329 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-22 08:57:37,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-22 08:57:37,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-22 08:57:37,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-22 08:57:37,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2019-10-22 08:57:37,334 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 19 [2019-10-22 08:57:37,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:37,334 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2019-10-22 08:57:37,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 08:57:37,335 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2019-10-22 08:57:37,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-22 08:57:37,335 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:37,335 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:37,536 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 08:57:37,536 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:37,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:37,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1982925978, now seen corresponding path program 1 times [2019-10-22 08:57:37,537 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:57:37,537 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1432536502] [2019-10-22 08:57:37,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/bin/uautomizer/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 08:57:37,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:37,689 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-22 08:57:37,691 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:37,759 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 [2019-10-22 08:57:37,759 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 08:57:37,770 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 08:57:37,775 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 [2019-10-22 08:57:37,775 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-22 08:57:37,783 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 08:57:37,783 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-22 08:57:37,784 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-10-22 08:57:37,811 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 [2019-10-22 08:57:37,811 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 08:57:37,823 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 08:57:37,827 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 [2019-10-22 08:57:37,827 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-22 08:57:37,833 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 08:57:37,834 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-22 08:57:37,834 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2019-10-22 08:57:37,848 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-22 08:57:37,848 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:57:37,884 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 [2019-10-22 08:57:37,885 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-10-22 08:57:37,895 INFO L567 ElimStorePlain]: treesize reduction 15, result has 31.8 percent of original size [2019-10-22 08:57:37,895 INFO L464 ElimStorePlain]: Eliminatee |#memory_$Pointer$.offset| vanished before elimination [2019-10-22 08:57:37,895 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-10-22 08:57:37,896 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:7 [2019-10-22 08:57:37,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-22 08:57:37,929 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1432536502] [2019-10-22 08:57:37,929 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:37,930 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 8 [2019-10-22 08:57:37,930 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948466987] [2019-10-22 08:57:37,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-22 08:57:37,930 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:57:37,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 08:57:37,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-22 08:57:37,931 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 8 states. [2019-10-22 08:57:38,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:38,198 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2019-10-22 08:57:38,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 08:57:38,200 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2019-10-22 08:57:38,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:38,200 INFO L225 Difference]: With dead ends: 44 [2019-10-22 08:57:38,200 INFO L226 Difference]: Without dead ends: 32 [2019-10-22 08:57:38,201 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-10-22 08:57:38,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-22 08:57:38,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-22 08:57:38,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-22 08:57:38,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-10-22 08:57:38,209 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 25 [2019-10-22 08:57:38,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:38,209 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-10-22 08:57:38,210 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-22 08:57:38,210 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-10-22 08:57:38,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-22 08:57:38,210 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:38,211 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:38,411 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 08:57:38,411 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:38,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:38,412 INFO L82 PathProgramCache]: Analyzing trace with hash 432541788, now seen corresponding path program 1 times [2019-10-22 08:57:38,412 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:57:38,412 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1917886058] [2019-10-22 08:57:38,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a9e7bd62-d7c6-4fba-9b1f-4762ca8f8d40/bin/uautomizer/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 08:57:38,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:38,558 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-22 08:57:38,560 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:38,585 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:57:38,632 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:57:38,663 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 08:57:38,664 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 52 [2019-10-22 08:57:38,665 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:57:38,667 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:57:38,668 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-22 08:57:38,688 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 08:57:38,688 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 42 [2019-10-22 08:57:38,689 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:57:38,691 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:57:38,692 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-22 08:57:38,755 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 08:57:38,956 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 08:57:38,957 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) [2019-10-22 08:57:38,960 INFO L168 Benchmark]: Toolchain (without parser) took 4088.73 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.6 MB). Free memory was 940.3 MB in the beginning and 919.3 MB in the end (delta: 21.0 MB). Peak memory consumption was 173.6 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:38,961 INFO L168 Benchmark]: CDTParser took 0.53 ms. Allocated memory is still 1.0 GB. Free memory is still 972.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:57:38,961 INFO L168 Benchmark]: CACSL2BoogieTranslator took 489.40 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.6 MB). Free memory was 940.3 MB in the beginning and 1.1 GB in the end (delta: -186.5 MB). Peak memory consumption was 24.2 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:38,961 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.20 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:57:38,962 INFO L168 Benchmark]: Boogie Preprocessor took 50.94 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:57:38,963 INFO L168 Benchmark]: RCFGBuilder took 391.75 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: 23.9 MB). Peak memory consumption was 23.9 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:38,963 INFO L168 Benchmark]: TraceAbstraction took 3102.88 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 919.3 MB in the end (delta: 183.6 MB). Peak memory consumption was 183.6 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:38,966 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.53 ms. Allocated memory is still 1.0 GB. Free memory is still 972.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 489.40 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.6 MB). Free memory was 940.3 MB in the beginning and 1.1 GB in the end (delta: -186.5 MB). Peak memory consumption was 24.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 50.20 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 50.94 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 391.75 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.9 MB). Peak memory consumption was 23.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3102.88 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 919.3 MB in the end (delta: 183.6 MB). Peak memory consumption was 183.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: UnsupportedOperationException: expected NNF de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: expected NNF: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:236) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...