./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_54da0a12-3dae-4f88-a86b-73262893d71a/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_54da0a12-3dae-4f88-a86b-73262893d71a/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_54da0a12-3dae-4f88-a86b-73262893d71a/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_54da0a12-3dae-4f88-a86b-73262893d71a/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_54da0a12-3dae-4f88-a86b-73262893d71a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_54da0a12-3dae-4f88-a86b-73262893d71a/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 bebd3708d0e1127b0953933828504d3490382862 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_54da0a12-3dae-4f88-a86b-73262893d71a/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_54da0a12-3dae-4f88-a86b-73262893d71a/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_54da0a12-3dae-4f88-a86b-73262893d71a/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_54da0a12-3dae-4f88-a86b-73262893d71a/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_54da0a12-3dae-4f88-a86b-73262893d71a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_54da0a12-3dae-4f88-a86b-73262893d71a/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 bebd3708d0e1127b0953933828504d3490382862 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 11:19:48,529 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 11:19:48,530 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 11:19:48,537 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 11:19:48,538 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 11:19:48,538 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 11:19:48,539 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 11:19:48,541 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 11:19:48,542 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 11:19:48,542 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 11:19:48,543 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 11:19:48,544 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 11:19:48,544 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 11:19:48,545 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 11:19:48,545 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 11:19:48,546 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 11:19:48,547 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 11:19:48,548 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 11:19:48,549 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 11:19:48,550 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 11:19:48,551 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 11:19:48,552 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 11:19:48,553 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 11:19:48,553 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 11:19:48,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 11:19:48,555 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 11:19:48,555 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 11:19:48,555 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 11:19:48,556 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 11:19:48,556 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 11:19:48,556 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 11:19:48,557 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 11:19:48,557 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 11:19:48,558 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 11:19:48,558 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 11:19:48,558 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 11:19:48,559 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 11:19:48,559 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 11:19:48,559 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 11:19:48,560 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 11:19:48,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 11:19:48,561 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_54da0a12-3dae-4f88-a86b-73262893d71a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 11:19:48,570 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 11:19:48,570 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 11:19:48,571 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 11:19:48,571 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 11:19:48,571 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 11:19:48,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 11:19:48,572 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 11:19:48,572 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 11:19:48,572 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 11:19:48,572 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 11:19:48,572 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 11:19:48,572 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 11:19:48,572 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 11:19:48,573 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 11:19:48,573 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 11:19:48,573 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 11:19:48,573 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 11:19:48,573 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 11:19:48,573 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 11:19:48,573 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 11:19:48,574 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 11:19:48,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 11:19:48,574 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 11:19:48,574 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 11:19:48,574 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 11:19:48,574 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 11:19:48,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 11:19:48,575 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 11:19:48,575 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 11:19:48,575 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_54da0a12-3dae-4f88-a86b-73262893d71a/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 -> bebd3708d0e1127b0953933828504d3490382862 [2019-12-07 11:19:48,674 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 11:19:48,682 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 11:19:48,684 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 11:19:48,685 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 11:19:48,685 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 11:19:48,686 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_54da0a12-3dae-4f88-a86b-73262893d71a/bin/uautomizer/../../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i [2019-12-07 11:19:48,722 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_54da0a12-3dae-4f88-a86b-73262893d71a/bin/uautomizer/data/e984690ed/39b49628a26e4f4198f18c6cb565b0f1/FLAG4aa11e73f [2019-12-07 11:19:49,114 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 11:19:49,114 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_54da0a12-3dae-4f88-a86b-73262893d71a/sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i [2019-12-07 11:19:49,123 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_54da0a12-3dae-4f88-a86b-73262893d71a/bin/uautomizer/data/e984690ed/39b49628a26e4f4198f18c6cb565b0f1/FLAG4aa11e73f [2019-12-07 11:19:49,132 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_54da0a12-3dae-4f88-a86b-73262893d71a/bin/uautomizer/data/e984690ed/39b49628a26e4f4198f18c6cb565b0f1 [2019-12-07 11:19:49,134 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 11:19:49,135 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 11:19:49,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 11:19:49,135 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 11:19:49,138 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 11:19:49,138 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 11:19:49" (1/1) ... [2019-12-07 11:19:49,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@703d5350 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:19:49, skipping insertion in model container [2019-12-07 11:19:49,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 11:19:49" (1/1) ... [2019-12-07 11:19:49,145 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 11:19:49,169 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 11:19:49,367 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 11:19:49,374 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 11:19:49,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 11:19:49,435 INFO L208 MainTranslator]: Completed translation [2019-12-07 11:19:49,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:19:49 WrapperNode [2019-12-07 11:19:49,436 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 11:19:49,436 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 11:19:49,436 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 11:19:49,436 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 11:19:49,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:19:49" (1/1) ... [2019-12-07 11:19:49,452 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:19:49" (1/1) ... [2019-12-07 11:19:49,468 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 11:19:49,468 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 11:19:49,468 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 11:19:49,468 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 11:19:49,474 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:19:49" (1/1) ... [2019-12-07 11:19:49,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:19:49" (1/1) ... [2019-12-07 11:19:49,476 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:19:49" (1/1) ... [2019-12-07 11:19:49,477 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:19:49" (1/1) ... [2019-12-07 11:19:49,482 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:19:49" (1/1) ... [2019-12-07 11:19:49,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:19:49" (1/1) ... [2019-12-07 11:19:49,486 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:19:49" (1/1) ... [2019-12-07 11:19:49,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 11:19:49,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 11:19:49,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 11:19:49,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 11:19:49,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:19:49" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_54da0a12-3dae-4f88-a86b-73262893d71a/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 11:19:49,528 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 11:19:49,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 11:19:49,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 11:19:49,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-12-07 11:19:49,528 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-12-07 11:19:49,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 11:19:49,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 11:19:49,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 11:19:49,727 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 11:19:49,728 INFO L287 CfgBuilder]: Removed 13 assume(true) statements. [2019-12-07 11:19:49,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:19:49 BoogieIcfgContainer [2019-12-07 11:19:49,728 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 11:19:49,729 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 11:19:49,729 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 11:19:49,731 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 11:19:49,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 11:19:49" (1/3) ... [2019-12-07 11:19:49,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@741270c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 11:19:49, skipping insertion in model container [2019-12-07 11:19:49,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:19:49" (2/3) ... [2019-12-07 11:19:49,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@741270c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 11:19:49, skipping insertion in model container [2019-12-07 11:19:49,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:19:49" (3/3) ... [2019-12-07 11:19:49,733 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_circular_traversal-2.i [2019-12-07 11:19:49,739 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 11:19:49,744 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 11:19:49,751 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 11:19:49,767 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 11:19:49,767 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 11:19:49,767 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 11:19:49,767 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 11:19:49,767 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 11:19:49,767 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 11:19:49,767 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 11:19:49,767 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 11:19:49,776 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-12-07 11:19:49,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 11:19:49,780 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:19:49,780 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:19:49,781 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:19:49,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:19:49,784 INFO L82 PathProgramCache]: Analyzing trace with hash 742134712, now seen corresponding path program 1 times [2019-12-07 11:19:49,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:19:49,790 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439646121] [2019-12-07 11:19:49,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:19:49,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:19:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:19:49,913 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439646121] [2019-12-07 11:19:49,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:19:49,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 11:19:49,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787365103] [2019-12-07 11:19:49,917 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 11:19:49,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:19:49,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 11:19:49,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 11:19:49,927 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2019-12-07 11:19:49,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:19:49,951 INFO L93 Difference]: Finished difference Result 43 states and 60 transitions. [2019-12-07 11:19:49,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 11:19:49,953 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-12-07 11:19:49,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:19:49,959 INFO L225 Difference]: With dead ends: 43 [2019-12-07 11:19:49,959 INFO L226 Difference]: Without dead ends: 21 [2019-12-07 11:19:49,961 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 11:19:49,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-12-07 11:19:49,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2019-12-07 11:19:49,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-12-07 11:19:49,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2019-12-07 11:19:49,986 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 10 [2019-12-07 11:19:49,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:19:49,986 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2019-12-07 11:19:49,986 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 11:19:49,986 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2019-12-07 11:19:49,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 11:19:49,987 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:19:49,987 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:19:49,987 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:19:49,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:19:49,987 INFO L82 PathProgramCache]: Analyzing trace with hash -60440637, now seen corresponding path program 1 times [2019-12-07 11:19:49,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:19:49,988 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613008195] [2019-12-07 11:19:49,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:19:50,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:19:50,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:19:50,040 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613008195] [2019-12-07 11:19:50,040 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720976654] [2019-12-07 11:19:50,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_54da0a12-3dae-4f88-a86b-73262893d71a/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:19:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:19:50,087 INFO L264 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 11:19:50,090 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:19:50,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:19:50,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:19:50,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-12-07 11:19:50,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631909083] [2019-12-07 11:19:50,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 11:19:50,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:19:50,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 11:19:50,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-07 11:19:50,112 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 5 states. [2019-12-07 11:19:50,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:19:50,135 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2019-12-07 11:19:50,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 11:19:50,136 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-12-07 11:19:50,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:19:50,136 INFO L225 Difference]: With dead ends: 35 [2019-12-07 11:19:50,136 INFO L226 Difference]: Without dead ends: 24 [2019-12-07 11:19:50,137 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-07 11:19:50,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-12-07 11:19:50,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2019-12-07 11:19:50,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-07 11:19:50,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-12-07 11:19:50,140 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 13 [2019-12-07 11:19:50,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:19:50,140 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-12-07 11:19:50,140 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 11:19:50,140 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-12-07 11:19:50,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 11:19:50,141 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:19:50,141 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:19:50,341 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:19:50,342 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:19:50,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:19:50,342 INFO L82 PathProgramCache]: Analyzing trace with hash 500274136, now seen corresponding path program 2 times [2019-12-07 11:19:50,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:19:50,343 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347935992] [2019-12-07 11:19:50,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:19:50,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:19:50,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:19:50,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347935992] [2019-12-07 11:19:50,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200427033] [2019-12-07 11:19:50,438 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_54da0a12-3dae-4f88-a86b-73262893d71a/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:19:50,525 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 11:19:50,525 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:19:50,527 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 11:19:50,529 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:19:50,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:19:50,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:19:50,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-12-07 11:19:50,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112736904] [2019-12-07 11:19:50,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 11:19:50,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:19:50,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 11:19:50,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-12-07 11:19:50,545 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 6 states. [2019-12-07 11:19:50,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:19:50,580 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2019-12-07 11:19:50,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 11:19:50,581 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-12-07 11:19:50,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:19:50,582 INFO L225 Difference]: With dead ends: 38 [2019-12-07 11:19:50,582 INFO L226 Difference]: Without dead ends: 27 [2019-12-07 11:19:50,582 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-12-07 11:19:50,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-12-07 11:19:50,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2019-12-07 11:19:50,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-12-07 11:19:50,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-12-07 11:19:50,587 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2019-12-07 11:19:50,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:19:50,587 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-12-07 11:19:50,587 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 11:19:50,587 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-12-07 11:19:50,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-07 11:19:50,588 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:19:50,588 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:19:50,789 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:19:50,789 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:19:50,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:19:50,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1626262435, now seen corresponding path program 3 times [2019-12-07 11:19:50,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:19:50,790 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381746134] [2019-12-07 11:19:50,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:19:50,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:19:50,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:19:50,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381746134] [2019-12-07 11:19:50,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988251890] [2019-12-07 11:19:50,865 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_54da0a12-3dae-4f88-a86b-73262893d71a/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:19:51,055 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-07 11:19:51,055 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:19:51,057 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 11:19:51,059 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:19:51,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:19:51,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:19:51,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-07 11:19:51,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409105759] [2019-12-07 11:19:51,071 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 11:19:51,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:19:51,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 11:19:51,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-12-07 11:19:51,072 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 7 states. [2019-12-07 11:19:51,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:19:51,101 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2019-12-07 11:19:51,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 11:19:51,102 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2019-12-07 11:19:51,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:19:51,102 INFO L225 Difference]: With dead ends: 39 [2019-12-07 11:19:51,102 INFO L226 Difference]: Without dead ends: 28 [2019-12-07 11:19:51,103 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-12-07 11:19:51,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-07 11:19:51,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-12-07 11:19:51,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-07 11:19:51,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2019-12-07 11:19:51,106 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 19 [2019-12-07 11:19:51,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:19:51,106 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2019-12-07 11:19:51,106 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 11:19:51,106 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2019-12-07 11:19:51,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-07 11:19:51,107 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:19:51,107 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:19:51,307 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:19:51,308 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:19:51,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:19:51,308 INFO L82 PathProgramCache]: Analyzing trace with hash -2045871112, now seen corresponding path program 4 times [2019-12-07 11:19:51,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:19:51,309 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330741449] [2019-12-07 11:19:51,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:19:51,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:19:51,566 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-07 11:19:51,566 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330741449] [2019-12-07 11:19:51,566 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187521172] [2019-12-07 11:19:51,567 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_54da0a12-3dae-4f88-a86b-73262893d71a/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 [2019-12-07 11:19:59,494 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 11:19:59,494 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:19:59,499 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 47 conjunts are in the unsatisfiable core [2019-12-07 11:19:59,501 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:19:59,542 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-12-07 11:19:59,543 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 11:19:59,549 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:19:59,549 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 11:19:59,550 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:15 [2019-12-07 11:19:59,596 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:19:59,597 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2019-12-07 11:19:59,597 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 11:19:59,604 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:19:59,604 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 11:19:59,604 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:17 [2019-12-07 11:19:59,630 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2019-12-07 11:19:59,631 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 11:19:59,638 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:19:59,639 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 11:19:59,639 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:17 [2019-12-07 11:19:59,666 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 11:19:59,674 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:19:59,677 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2019-12-07 11:19:59,678 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 11:19:59,683 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:19:59,684 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 11:19:59,684 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:44, output treesize:14 [2019-12-07 11:19:59,717 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-12-07 11:19:59,718 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 11:19:59,721 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:19:59,721 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 11:19:59,721 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:7 [2019-12-07 11:19:59,736 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-07 11:19:59,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:19:59,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2019-12-07 11:19:59,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796400338] [2019-12-07 11:19:59,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-07 11:19:59,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:19:59,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-07 11:19:59,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2019-12-07 11:19:59,738 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 18 states. [2019-12-07 11:20:00,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:20:00,032 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2019-12-07 11:20:00,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 11:20:00,033 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2019-12-07 11:20:00,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:20:00,033 INFO L225 Difference]: With dead ends: 36 [2019-12-07 11:20:00,033 INFO L226 Difference]: Without dead ends: 34 [2019-12-07 11:20:00,034 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2019-12-07 11:20:00,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-12-07 11:20:00,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2019-12-07 11:20:00,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-07 11:20:00,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2019-12-07 11:20:00,039 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2019-12-07 11:20:00,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:20:00,039 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2019-12-07 11:20:00,039 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-07 11:20:00,039 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2019-12-07 11:20:00,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-12-07 11:20:00,039 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:20:00,040 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:20:00,240 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:20:00,240 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:20:00,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:20:00,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1335739081, now seen corresponding path program 1 times [2019-12-07 11:20:00,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:20:00,241 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4837944] [2019-12-07 11:20:00,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:20:00,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:20:00,647 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:20:00,647 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4837944] [2019-12-07 11:20:00,647 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027172593] [2019-12-07 11:20:00,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_54da0a12-3dae-4f88-a86b-73262893d71a/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 [2019-12-07 11:20:00,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:20:00,698 INFO L264 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 81 conjunts are in the unsatisfiable core [2019-12-07 11:20:00,701 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:20:00,705 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-12-07 11:20:00,706 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 11:20:00,710 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:00,710 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 11:20:00,710 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 11:20:00,746 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:00,746 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2019-12-07 11:20:00,747 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 11:20:00,763 INFO L614 ElimStorePlain]: treesize reduction 14, result has 60.0 percent of original size [2019-12-07 11:20:00,764 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 11:20:00,764 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:21 [2019-12-07 11:20:00,817 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:00,818 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 69 [2019-12-07 11:20:00,818 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 11:20:00,846 INFO L614 ElimStorePlain]: treesize reduction 28, result has 54.8 percent of original size [2019-12-07 11:20:00,847 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 11:20:00,847 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:34 [2019-12-07 11:20:00,952 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:00,952 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 99 [2019-12-07 11:20:00,953 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 11:20:00,995 INFO L614 ElimStorePlain]: treesize reduction 42, result has 56.3 percent of original size [2019-12-07 11:20:00,996 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 11:20:00,996 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:54 [2019-12-07 11:20:01,046 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2019-12-07 11:20:01,047 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 11:20:01,065 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:01,066 INFO L534 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-12-07 11:20:01,066 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:89, output treesize:61 [2019-12-07 11:20:01,125 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:01,125 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 48 [2019-12-07 11:20:01,126 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 11:20:01,144 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:01,145 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 11:20:01,145 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:69, output treesize:32 [2019-12-07 11:20:01,195 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2019-12-07 11:20:01,195 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 11:20:01,255 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:01,261 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2019-12-07 11:20:01,261 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 11:20:01,297 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:01,299 INFO L534 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 11:20:01,325 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:01,330 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2019-12-07 11:20:01,331 INFO L534 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-12-07 11:20:01,351 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:01,357 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2019-12-07 11:20:01,357 INFO L534 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-12-07 11:20:01,374 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:01,377 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2019-12-07 11:20:01,378 INFO L534 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-12-07 11:20:01,394 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:01,394 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 6 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 11:20:01,394 INFO L239 ElimStorePlain]: Needed 7 recursive calls to eliminate 7 variables, input treesize:130, output treesize:74 [2019-12-07 11:20:01,440 INFO L430 ElimStorePlain]: Different costs {2=[|v_#memory_int_27|], 5=[|v_#memory_int_29|, |v_#memory_$Pointer$.base_20|, |v_#memory_$Pointer$.offset_20|]} [2019-12-07 11:20:01,442 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 11:20:01,486 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:01,491 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 34 [2019-12-07 11:20:01,491 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 11:20:01,527 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:01,568 INFO L343 Elim1Store]: treesize reduction 3, result has 94.4 percent of original size [2019-12-07 11:20:01,568 INFO L377 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 81 treesize of output 102 [2019-12-07 11:20:01,569 INFO L534 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-12-07 11:20:01,647 INFO L614 ElimStorePlain]: treesize reduction 75, result has 61.9 percent of original size [2019-12-07 11:20:01,651 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 11:20:01,653 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 41 [2019-12-07 11:20:01,653 INFO L534 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-12-07 11:20:01,674 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:01,674 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 11:20:01,675 INFO L239 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:170, output treesize:108 [2019-12-07 11:20:01,779 INFO L430 ElimStorePlain]: Different costs {0=[|#memory_$Pointer$.base|, |#memory_$Pointer$.offset|], 3=[|v_#memory_int_30|], 9=[|v_#memory_$Pointer$.offset_21|, |v_#memory_$Pointer$.base_21|]} [2019-12-07 11:20:01,782 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 11:20:01,807 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:01,810 INFO L534 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 11:20:01,833 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:01,837 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 11:20:01,838 INFO L377 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2019-12-07 11:20:01,838 INFO L534 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-12-07 11:20:01,856 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:01,859 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 11:20:01,860 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 43 [2019-12-07 11:20:01,862 INFO L430 ElimStorePlain]: Different costs {0=[v_arrayElimCell_30], 1=[v_arrayElimCell_31]} [2019-12-07 11:20:01,865 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2019-12-07 11:20:01,865 INFO L534 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-12-07 11:20:01,869 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:01,873 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2019-12-07 11:20:01,873 INFO L534 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 11:20:01,877 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:01,877 INFO L534 ElimStorePlain]: Start of recursive call 5: 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 11:20:01,889 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:01,899 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:01,899 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 78 [2019-12-07 11:20:01,900 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 11:20:01,900 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 11:20:01,901 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 11:20:01,903 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 11:20:01,906 INFO L430 ElimStorePlain]: Different costs {0=[v_arrayElimCell_38, v_arrayElimCell_36], 1=[v_arrayElimCell_37]} [2019-12-07 11:20:01,908 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@2379d463 [2019-12-07 11:20:01,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 11:20:01,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-12-07 11:20:01,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834049951] [2019-12-07 11:20:01,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-07 11:20:01,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:20:01,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-07 11:20:01,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2019-12-07 11:20:01,910 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 15 states. [2019-12-07 11:20:01,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 11:20:02,110 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:20:02,111 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@2379d463 at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.managedscript.ManagedScript.lock(ManagedScript.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:354) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:202) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:127) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:60) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:62) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:359) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1066) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:968) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:188) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:698) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:627) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:454) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:139) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-12-07 11:20:02,117 INFO L168 Benchmark]: Toolchain (without parser) took 12981.45 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.6 MB). Free memory was 934.4 MB in the beginning and 973.3 MB in the end (delta: -38.9 MB). Peak memory consumption was 93.7 MB. Max. memory is 11.5 GB. [2019-12-07 11:20:02,117 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 955.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 11:20:02,118 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.68 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 90.2 MB). Free memory was 934.4 MB in the beginning and 1.1 GB in the end (delta: -134.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-12-07 11:20:02,119 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.55 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 11:20:02,119 INFO L168 Benchmark]: Boogie Preprocessor took 20.36 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 11:20:02,120 INFO L168 Benchmark]: RCFGBuilder took 240.12 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 11.5 GB. [2019-12-07 11:20:02,121 INFO L168 Benchmark]: TraceAbstraction took 12385.70 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 42.5 MB). Free memory was 1.0 GB in the beginning and 973.3 MB in the end (delta: 62.7 MB). Peak memory consumption was 105.2 MB. Max. memory is 11.5 GB. [2019-12-07 11:20:02,125 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 955.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 300.68 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 90.2 MB). Free memory was 934.4 MB in the beginning and 1.1 GB in the end (delta: -134.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 31.55 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.36 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 240.12 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 12385.70 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 42.5 MB). Free memory was 1.0 GB in the beginning and 973.3 MB in the end (delta: 62.7 MB). Peak memory consumption was 105.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@2379d463 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@2379d463: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.managedscript.ManagedScript.lock(ManagedScript.java:83) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.25-f470102 [2019-12-07 11:20:03,454 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 11:20:03,455 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 11:20:03,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 11:20:03,463 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 11:20:03,464 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 11:20:03,465 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 11:20:03,466 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 11:20:03,468 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 11:20:03,468 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 11:20:03,469 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 11:20:03,470 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 11:20:03,470 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 11:20:03,470 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 11:20:03,471 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 11:20:03,472 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 11:20:03,472 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 11:20:03,473 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 11:20:03,475 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 11:20:03,476 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 11:20:03,477 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 11:20:03,478 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 11:20:03,479 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 11:20:03,479 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 11:20:03,481 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 11:20:03,481 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 11:20:03,482 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 11:20:03,482 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 11:20:03,482 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 11:20:03,483 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 11:20:03,483 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 11:20:03,484 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 11:20:03,484 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 11:20:03,485 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 11:20:03,485 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 11:20:03,486 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 11:20:03,486 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 11:20:03,486 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 11:20:03,486 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 11:20:03,487 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 11:20:03,487 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 11:20:03,488 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_54da0a12-3dae-4f88-a86b-73262893d71a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-12-07 11:20:03,498 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 11:20:03,498 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 11:20:03,499 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 11:20:03,499 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 11:20:03,499 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 11:20:03,499 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 11:20:03,499 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 11:20:03,499 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 11:20:03,500 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 11:20:03,500 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 11:20:03,500 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 11:20:03,500 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 11:20:03,500 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-12-07 11:20:03,500 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-12-07 11:20:03,500 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 11:20:03,500 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 11:20:03,501 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 11:20:03,501 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 11:20:03,501 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 11:20:03,501 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 11:20:03,501 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 11:20:03,501 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 11:20:03,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 11:20:03,501 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 11:20:03,502 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 11:20:03,502 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 11:20:03,502 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-12-07 11:20:03,502 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-12-07 11:20:03,502 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 11:20:03,502 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 11:20:03,502 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 11:20:03,502 INFO L138 SettingsManager]: * Logic for external solver=AUFBV Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_54da0a12-3dae-4f88-a86b-73262893d71a/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 -> bebd3708d0e1127b0953933828504d3490382862 [2019-12-07 11:20:03,663 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 11:20:03,673 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 11:20:03,676 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 11:20:03,677 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 11:20:03,677 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 11:20:03,678 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_54da0a12-3dae-4f88-a86b-73262893d71a/bin/uautomizer/../../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i [2019-12-07 11:20:03,720 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_54da0a12-3dae-4f88-a86b-73262893d71a/bin/uautomizer/data/76b8f25bf/ded24af1ed224c67b6c97209ab5def45/FLAGe56b4acf9 [2019-12-07 11:20:04,194 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 11:20:04,194 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_54da0a12-3dae-4f88-a86b-73262893d71a/sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i [2019-12-07 11:20:04,204 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_54da0a12-3dae-4f88-a86b-73262893d71a/bin/uautomizer/data/76b8f25bf/ded24af1ed224c67b6c97209ab5def45/FLAGe56b4acf9 [2019-12-07 11:20:04,695 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_54da0a12-3dae-4f88-a86b-73262893d71a/bin/uautomizer/data/76b8f25bf/ded24af1ed224c67b6c97209ab5def45 [2019-12-07 11:20:04,697 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 11:20:04,698 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 11:20:04,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 11:20:04,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 11:20:04,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 11:20:04,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 11:20:04" (1/1) ... [2019-12-07 11:20:04,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7df1ddb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:20:04, skipping insertion in model container [2019-12-07 11:20:04,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 11:20:04" (1/1) ... [2019-12-07 11:20:04,708 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 11:20:04,738 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 11:20:04,973 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 11:20:04,982 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 11:20:05,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 11:20:05,047 INFO L208 MainTranslator]: Completed translation [2019-12-07 11:20:05,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:20:05 WrapperNode [2019-12-07 11:20:05,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 11:20:05,047 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 11:20:05,047 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 11:20:05,048 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 11:20:05,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:20:05" (1/1) ... [2019-12-07 11:20:05,065 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:20:05" (1/1) ... [2019-12-07 11:20:05,080 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 11:20:05,080 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 11:20:05,080 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 11:20:05,080 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 11:20:05,086 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:20:05" (1/1) ... [2019-12-07 11:20:05,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:20:05" (1/1) ... [2019-12-07 11:20:05,088 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:20:05" (1/1) ... [2019-12-07 11:20:05,089 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:20:05" (1/1) ... [2019-12-07 11:20:05,096 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:20:05" (1/1) ... [2019-12-07 11:20:05,099 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:20:05" (1/1) ... [2019-12-07 11:20:05,100 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:20:05" (1/1) ... [2019-12-07 11:20:05,103 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 11:20:05,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 11:20:05,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 11:20:05,103 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 11:20:05,104 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:20:05" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_54da0a12-3dae-4f88-a86b-73262893d71a/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 11:20:05,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-12-07 11:20:05,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 11:20:05,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-12-07 11:20:05,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-12-07 11:20:05,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 11:20:05,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-12-07 11:20:05,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 11:20:05,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 11:20:05,410 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 11:20:05,410 INFO L287 CfgBuilder]: Removed 13 assume(true) statements. [2019-12-07 11:20:05,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:20:05 BoogieIcfgContainer [2019-12-07 11:20:05,411 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 11:20:05,412 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 11:20:05,412 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 11:20:05,414 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 11:20:05,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 11:20:04" (1/3) ... [2019-12-07 11:20:05,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2981b48f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 11:20:05, skipping insertion in model container [2019-12-07 11:20:05,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:20:05" (2/3) ... [2019-12-07 11:20:05,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2981b48f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 11:20:05, skipping insertion in model container [2019-12-07 11:20:05,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:20:05" (3/3) ... [2019-12-07 11:20:05,416 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_circular_traversal-2.i [2019-12-07 11:20:05,422 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 11:20:05,426 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 11:20:05,433 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 11:20:05,448 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 11:20:05,448 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 11:20:05,448 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 11:20:05,448 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 11:20:05,448 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 11:20:05,448 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 11:20:05,448 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 11:20:05,448 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 11:20:05,457 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-12-07 11:20:05,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 11:20:05,461 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:20:05,461 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:20:05,461 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:20:05,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:20:05,465 INFO L82 PathProgramCache]: Analyzing trace with hash 742134712, now seen corresponding path program 1 times [2019-12-07 11:20:05,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 11:20:05,472 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946857402] [2019-12-07 11:20:05,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_54da0a12-3dae-4f88-a86b-73262893d71a/bin/uautomizer/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2019-12-07 11:20:05,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:20:05,549 INFO L264 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 11:20:05,554 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:20:05,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:20:05,579 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:20:05,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:20:05,590 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [946857402] [2019-12-07 11:20:05,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:20:05,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-12-07 11:20:05,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629090952] [2019-12-07 11:20:05,594 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 11:20:05,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 11:20:05,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 11:20:05,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 11:20:05,605 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 4 states. [2019-12-07 11:20:05,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:20:05,712 INFO L93 Difference]: Finished difference Result 44 states and 63 transitions. [2019-12-07 11:20:05,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 11:20:05,714 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-12-07 11:20:05,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:20:05,720 INFO L225 Difference]: With dead ends: 44 [2019-12-07 11:20:05,720 INFO L226 Difference]: Without dead ends: 22 [2019-12-07 11:20:05,722 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 11:20:05,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-12-07 11:20:05,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-12-07 11:20:05,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-07 11:20:05,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-12-07 11:20:05,744 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 10 [2019-12-07 11:20:05,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:20:05,744 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-12-07 11:20:05,744 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 11:20:05,744 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-12-07 11:20:05,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 11:20:05,744 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:20:05,745 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:20:05,945 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2019-12-07 11:20:05,946 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:20:05,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:20:05,946 INFO L82 PathProgramCache]: Analyzing trace with hash 500274136, now seen corresponding path program 1 times [2019-12-07 11:20:05,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 11:20:05,948 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [286281579] [2019-12-07 11:20:05,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_54da0a12-3dae-4f88-a86b-73262893d71a/bin/uautomizer/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2019-12-07 11:20:06,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:20:06,054 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 11:20:06,055 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:20:06,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:20:06,074 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:20:06,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:20:06,117 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [286281579] [2019-12-07 11:20:06,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:20:06,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-12-07 11:20:06,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690166144] [2019-12-07 11:20:06,119 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 11:20:06,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-12-07 11:20:06,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 11:20:06,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-12-07 11:20:06,120 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 8 states. [2019-12-07 11:20:06,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:20:06,433 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2019-12-07 11:20:06,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 11:20:06,434 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2019-12-07 11:20:06,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:20:06,435 INFO L225 Difference]: With dead ends: 39 [2019-12-07 11:20:06,435 INFO L226 Difference]: Without dead ends: 28 [2019-12-07 11:20:06,436 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-12-07 11:20:06,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-07 11:20:06,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-12-07 11:20:06,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-07 11:20:06,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2019-12-07 11:20:06,441 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 16 [2019-12-07 11:20:06,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:20:06,441 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2019-12-07 11:20:06,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 11:20:06,441 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2019-12-07 11:20:06,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-07 11:20:06,442 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:20:06,442 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:20:06,643 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2019-12-07 11:20:06,643 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:20:06,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:20:06,644 INFO L82 PathProgramCache]: Analyzing trace with hash -2045871112, now seen corresponding path program 2 times [2019-12-07 11:20:06,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-12-07 11:20:06,647 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [71804142] [2019-12-07 11:20:06,647 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_54da0a12-3dae-4f88-a86b-73262893d71a/bin/uautomizer/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2019-12-07 11:20:06,863 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 11:20:06,863 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:20:06,879 INFO L264 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 30 conjunts are in the unsatisfiable core [2019-12-07 11:20:06,882 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:20:06,909 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-12-07 11:20:06,909 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 11:20:06,918 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:06,918 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 11:20:06,918 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 11:20:06,957 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:06,958 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2019-12-07 11:20:06,959 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 11:20:06,986 INFO L614 ElimStorePlain]: treesize reduction 14, result has 60.0 percent of original size [2019-12-07 11:20:06,987 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 11:20:06,988 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:21 [2019-12-07 11:20:07,052 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:07,052 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 50 [2019-12-07 11:20:07,053 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 11:20:07,090 INFO L614 ElimStorePlain]: treesize reduction 28, result has 48.1 percent of original size [2019-12-07 11:20:07,091 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-12-07 11:20:07,092 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:26 [2019-12-07 11:20:07,153 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:07,154 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 69 [2019-12-07 11:20:07,155 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 11:20:07,201 INFO L614 ElimStorePlain]: treesize reduction 28, result has 54.8 percent of original size [2019-12-07 11:20:07,202 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 11:20:07,202 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:34 [2019-12-07 11:20:07,282 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:07,283 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2019-12-07 11:20:07,284 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 11:20:07,311 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:07,312 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 11:20:07,312 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:22 [2019-12-07 11:20:07,346 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2019-12-07 11:20:07,347 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 11:20:07,360 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:07,361 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 11:20:07,361 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:54, output treesize:18 [2019-12-07 11:20:07,387 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2019-12-07 11:20:07,387 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 11:20:07,406 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:07,409 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 11:20:07,410 INFO L377 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2019-12-07 11:20:07,411 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 11:20:07,420 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:07,420 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 11:20:07,420 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:56, output treesize:14 [2019-12-07 11:20:07,468 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-12-07 11:20:07,468 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 11:20:07,473 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:07,473 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 11:20:07,474 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:7 [2019-12-07 11:20:07,494 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-07 11:20:07,494 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 11:20:07,555 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 11:20:07,566 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:07,568 INFO L534 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 11:20:07,572 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:07,572 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-12-07 11:20:07,572 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:48, output treesize:22 [2019-12-07 11:20:07,644 INFO L430 ElimStorePlain]: Different costs {0=[|v_#memory_int_28|], 2=[|v_#memory_int_32|]} [2019-12-07 11:20:07,684 INFO L343 Elim1Store]: treesize reduction 24, result has 45.5 percent of original size [2019-12-07 11:20:07,685 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 20 [2019-12-07 11:20:07,685 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-12-07 11:20:07,711 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:15,828 WARN L192 SmtUtils]: Spent 8.11 s on a formula simplification that was a NOOP. DAG size: 27 [2019-12-07 11:20:15,828 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:15,829 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 76 [2019-12-07 11:20:15,829 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 11:20:15,830 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 11:20:15,830 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 11:20:15,832 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 11:20:15,834 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 11:20:15,835 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 11:20:15,836 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 11:20:15,837 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 11:20:15,837 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 11:20:15,838 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 11:20:15,845 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-12-07 11:20:15,845 INFO L534 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-12-07 11:20:15,854 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:24,155 WARN L192 SmtUtils]: Spent 8.30 s on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2019-12-07 11:20:24,156 INFO L614 ElimStorePlain]: treesize reduction 35, result has 78.4 percent of original size [2019-12-07 11:20:36,481 WARN L192 SmtUtils]: Spent 12.32 s on a formula simplification that was a NOOP. DAG size: 90 [2019-12-07 11:20:36,481 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:36,494 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2019-12-07 11:20:36,502 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 11:20:36,502 INFO L430 ElimStorePlain]: Different costs {0=[v_arrayElimCell_17], 1=[v_arrayElimCell_16]} [2019-12-07 11:20:36,512 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2019-12-07 11:20:36,512 INFO L534 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-12-07 11:20:36,515 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:36,520 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 11:20:36,526 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2019-12-07 11:20:36,526 INFO L534 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-12-07 11:20:36,527 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:36,527 INFO L534 ElimStorePlain]: Start of recursive call 5: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 11:20:44,749 WARN L192 SmtUtils]: Spent 8.22 s on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2019-12-07 11:20:44,749 INFO L614 ElimStorePlain]: treesize reduction 4, result has 96.2 percent of original size [2019-12-07 11:20:57,003 WARN L192 SmtUtils]: Spent 12.25 s on a formula simplification that was a NOOP. DAG size: 80 [2019-12-07 11:20:57,003 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:57,015 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2019-12-07 11:20:57,021 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 11:20:57,023 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-12-07 11:20:57,028 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 11:20:57,034 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2019-12-07 11:20:57,034 INFO L534 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-12-07 11:20:57,037 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:20:57,038 INFO L534 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 11:20:59,134 WARN L192 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 40 [2019-12-07 11:20:59,135 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:21:09,343 WARN L192 SmtUtils]: Spent 10.21 s on a formula simplification that was a NOOP. DAG size: 69 [2019-12-07 11:21:09,344 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:21:09,353 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2019-12-07 11:21:09,357 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 11:21:09,365 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 11:21:09,385 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:21:09,385 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2019-12-07 11:21:09,386 INFO L534 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-12-07 11:21:09,388 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:21:09,388 INFO L534 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 11:21:13,488 WARN L192 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-12-07 11:21:13,489 INFO L614 ElimStorePlain]: treesize reduction 10, result has 77.8 percent of original size [2019-12-07 11:21:23,830 WARN L192 SmtUtils]: Spent 10.34 s on a formula simplification that was a NOOP. DAG size: 55 [2019-12-07 11:21:23,831 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:21:23,831 INFO L502 ElimStorePlain]: Eliminatee v_prenex_2 vanished before elimination [2019-12-07 11:21:23,839 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2019-12-07 11:21:23,844 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 11:21:23,844 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 11:21:23,849 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 11:21:23,856 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2019-12-07 11:21:23,856 INFO L534 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-12-07 11:21:23,857 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:21:23,858 INFO L534 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 11:21:23,871 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:21:32,114 WARN L192 SmtUtils]: Spent 8.24 s on a formula simplification that was a NOOP. DAG size: 45 [2019-12-07 11:21:32,114 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:21:32,126 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 11:21:32,127 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 60 [2019-12-07 11:21:32,127 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-12-07 11:21:32,127 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 11:21:32,128 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 11:21:32,128 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 11:21:32,129 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 11:21:32,130 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 11:21:32,130 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 11:21:32,135 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 11:21:32,135 INFO L430 ElimStorePlain]: Different costs {0=[v_arrayElimCell_29], 1=[v_arrayElimCell_28]} [2019-12-07 11:21:32,139 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [71804142] [2019-12-07 11:21:32,139 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@52de11c [2019-12-07 11:21:32,140 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [150030400] [2019-12-07 11:21:32,140 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_54da0a12-3dae-4f88-a86b-73262893d71a/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 [2019-12-07 11:21:32,488 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 11:21:32,488 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:21:32,493 INFO L264 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 26 conjunts are in the unsatisfiable core [2019-12-07 11:21:32,494 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@52de11c [2019-12-07 11:21:32,494 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696846779] [2019-12-07 11:21:32,494 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_54da0a12-3dae-4f88-a86b-73262893d71a/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 [2019-12-07 11:21:32,726 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 11:21:32,726 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:21:32,730 INFO L264 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-07 11:21:32,730 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.IncrementalPlicationChecker@52de11c [2019-12-07 11:21:32,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:21:32,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2019-12-07 11:21:32,731 ERROR L206 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2019-12-07 11:21:32,731 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 11:21:33,335 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3,5 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:21:33,355 WARN L229 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2019-12-07 11:21:33,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 11:21:33 BoogieIcfgContainer [2019-12-07 11:21:33,356 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 11:21:33,356 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 11:21:33,356 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 11:21:33,356 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 11:21:33,356 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:20:05" (3/4) ... [2019-12-07 11:21:33,358 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-12-07 11:21:33,358 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 11:21:33,359 INFO L168 Benchmark]: Toolchain (without parser) took 88661.29 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 107.5 MB). Free memory was 945.7 MB in the beginning and 1.0 GB in the end (delta: -95.7 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. [2019-12-07 11:21:33,360 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 11:21:33,360 INFO L168 Benchmark]: CACSL2BoogieTranslator took 348.51 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 106.4 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -136.8 MB). Peak memory consumption was 20.9 MB. Max. memory is 11.5 GB. [2019-12-07 11:21:33,360 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.29 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 11:21:33,360 INFO L168 Benchmark]: Boogie Preprocessor took 23.19 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 11:21:33,361 INFO L168 Benchmark]: RCFGBuilder took 307.77 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 31.3 MB). Peak memory consumption was 31.3 MB. Max. memory is 11.5 GB. [2019-12-07 11:21:33,361 INFO L168 Benchmark]: TraceAbstraction took 87944.09 ms. Allocated memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.0 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 9.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. [2019-12-07 11:21:33,361 INFO L168 Benchmark]: Witness Printer took 2.58 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 11:21:33,363 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 348.51 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 106.4 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -136.8 MB). Peak memory consumption was 20.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 32.29 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 23.19 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 307.77 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 31.3 MB). Peak memory consumption was 31.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 87944.09 ms. Allocated memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.0 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 9.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. * Witness Printer took 2.58 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 615]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L589] const int len = 5; [L590] const int data_init = 1; [L565] DLL last = (DLL) malloc(sizeof(struct node)); [L566] COND FALSE !(((void *)0) == last) [L569] last->next = last [L570] last->prev = last [L571] last->data = data [L572] DLL head = last; [L573] COND TRUE len > 1 [L574] DLL new_head = (DLL) malloc(sizeof(struct node)); [L575] COND FALSE !(((void *)0) == new_head) [L578] new_head->next = head [L579] new_head->data = data [L580] head->prev = new_head [L581] head = new_head [L582] len-- [L573] COND TRUE len > 1 [L574] DLL new_head = (DLL) malloc(sizeof(struct node)); [L575] COND FALSE !(((void *)0) == new_head) [L578] new_head->next = head [L579] new_head->data = data [L580] head->prev = new_head [L581] head = new_head [L582] len-- [L573] COND TRUE len > 1 [L574] DLL new_head = (DLL) malloc(sizeof(struct node)); [L575] COND FALSE !(((void *)0) == new_head) [L578] new_head->next = head [L579] new_head->data = data [L580] head->prev = new_head [L581] head = new_head [L582] len-- [L573] COND TRUE len > 1 [L574] DLL new_head = (DLL) malloc(sizeof(struct node)); [L575] COND FALSE !(((void *)0) == new_head) [L578] new_head->next = head [L579] new_head->data = data [L580] head->prev = new_head [L581] head = new_head [L582] len-- [L573] COND FALSE !(len > 1) [L584] last->next = head [L585] head->prev = last [L586] return head; [L591] DLL head = dll_circular_create(len, data_init); [L592] int data_new = 1; [L593] DLL ptr = head; [L595] EXPR ptr->data [L595] COND TRUE data_init != ptr->data [L615] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 1 error locations. Result: UNKNOWN, OverallTime: 87.8s, OverallIterations: 3, TraceHistogramMax: 4, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 48 SDtfs, 22 SDslu, 105 SDs, 0 SdLazy, 32 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 48 ConstructedInterpolants, 0 QuantifiedInterpolants, 1824 SizeOfPredicates, 6 NumberOfNonLiveVariables, 126 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 0/10 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...