./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_4ebd4707-88a7-4799-a284-e9790522edd0/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_4ebd4707-88a7-4799-a284-e9790522edd0/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4ebd4707-88a7-4799-a284-e9790522edd0/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4ebd4707-88a7-4799-a284-e9790522edd0/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_4ebd4707-88a7-4799-a284-e9790522edd0/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4ebd4707-88a7-4799-a284-e9790522edd0/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 573d04c3ab16ffed1ccac6c6179d92b670a825d7 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-15 23:19:00,834 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 23:19:00,836 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 23:19:00,849 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 23:19:00,850 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 23:19:00,851 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 23:19:00,853 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 23:19:00,861 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 23:19:00,865 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 23:19:00,869 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 23:19:00,870 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 23:19:00,872 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 23:19:00,872 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 23:19:00,874 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 23:19:00,875 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 23:19:00,876 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 23:19:00,876 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 23:19:00,877 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 23:19:00,879 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 23:19:00,882 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 23:19:00,885 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 23:19:00,887 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 23:19:00,890 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 23:19:00,890 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 23:19:00,893 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 23:19:00,893 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 23:19:00,894 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 23:19:00,895 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 23:19:00,895 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 23:19:00,896 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 23:19:00,896 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 23:19:00,897 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 23:19:00,898 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 23:19:00,898 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 23:19:00,899 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 23:19:00,900 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 23:19:00,900 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 23:19:00,901 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 23:19:00,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 23:19:00,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 23:19:00,902 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 23:19:00,903 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4ebd4707-88a7-4799-a284-e9790522edd0/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-15 23:19:00,928 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 23:19:00,936 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 23:19:00,937 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 23:19:00,937 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 23:19:00,938 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 23:19:00,938 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 23:19:00,938 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 23:19:00,938 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 23:19:00,938 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 23:19:00,939 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 23:19:00,939 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 23:19:00,939 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 23:19:00,939 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 23:19:00,939 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 23:19:00,940 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 23:19:00,940 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 23:19:00,940 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 23:19:00,940 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 23:19:00,940 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 23:19:00,941 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 23:19:00,941 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 23:19:00,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 23:19:00,941 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 23:19:00,942 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 23:19:00,942 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 23:19:00,942 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 23:19:00,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-15 23:19:00,942 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 23:19:00,943 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_4ebd4707-88a7-4799-a284-e9790522edd0/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 -> 573d04c3ab16ffed1ccac6c6179d92b670a825d7 [2019-11-15 23:19:00,967 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 23:19:00,975 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 23:19:00,978 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 23:19:00,979 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 23:19:00,979 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 23:19:00,980 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4ebd4707-88a7-4799-a284-e9790522edd0/bin/uautomizer/../../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i [2019-11-15 23:19:01,035 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4ebd4707-88a7-4799-a284-e9790522edd0/bin/uautomizer/data/ee0fca031/c8c344a020d04153b84b59097dfb2549/FLAGc6b12ab29 [2019-11-15 23:19:01,496 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 23:19:01,496 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4ebd4707-88a7-4799-a284-e9790522edd0/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i [2019-11-15 23:19:01,508 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4ebd4707-88a7-4799-a284-e9790522edd0/bin/uautomizer/data/ee0fca031/c8c344a020d04153b84b59097dfb2549/FLAGc6b12ab29 [2019-11-15 23:19:01,519 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4ebd4707-88a7-4799-a284-e9790522edd0/bin/uautomizer/data/ee0fca031/c8c344a020d04153b84b59097dfb2549 [2019-11-15 23:19:01,521 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 23:19:01,522 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 23:19:01,523 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 23:19:01,523 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 23:19:01,525 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 23:19:01,526 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 11:19:01" (1/1) ... [2019-11-15 23:19:01,528 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c482975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:19:01, skipping insertion in model container [2019-11-15 23:19:01,528 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 11:19:01" (1/1) ... [2019-11-15 23:19:01,534 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 23:19:01,567 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 23:19:01,937 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 23:19:01,949 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 23:19:01,998 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 23:19:02,045 INFO L192 MainTranslator]: Completed translation [2019-11-15 23:19:02,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:19:02 WrapperNode [2019-11-15 23:19:02,046 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 23:19:02,046 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 23:19:02,046 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 23:19:02,046 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 23:19:02,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:19:02" (1/1) ... [2019-11-15 23:19:02,071 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:19:02" (1/1) ... [2019-11-15 23:19:02,103 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 23:19:02,103 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 23:19:02,103 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 23:19:02,103 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 23:19:02,112 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:19:02" (1/1) ... [2019-11-15 23:19:02,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:19:02" (1/1) ... [2019-11-15 23:19:02,127 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:19:02" (1/1) ... [2019-11-15 23:19:02,128 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:19:02" (1/1) ... [2019-11-15 23:19:02,134 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:19:02" (1/1) ... [2019-11-15 23:19:02,141 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:19:02" (1/1) ... [2019-11-15 23:19:02,154 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:19:02" (1/1) ... [2019-11-15 23:19:02,157 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 23:19:02,158 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 23:19:02,158 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 23:19:02,158 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 23:19:02,159 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:19:02" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebd4707-88a7-4799-a284-e9790522edd0/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 23:19:02,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-15 23:19:02,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-15 23:19:02,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-15 23:19:02,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-15 23:19:02,238 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-15 23:19:02,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-15 23:19:02,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 23:19:02,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 23:19:02,678 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 23:19:02,678 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-15 23:19:02,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:19:02 BoogieIcfgContainer [2019-11-15 23:19:02,680 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 23:19:02,680 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 23:19:02,683 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 23:19:02,686 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 23:19:02,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 11:19:01" (1/3) ... [2019-11-15 23:19:02,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a1a8fea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 11:19:02, skipping insertion in model container [2019-11-15 23:19:02,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:19:02" (2/3) ... [2019-11-15 23:19:02,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a1a8fea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 11:19:02, skipping insertion in model container [2019-11-15 23:19:02,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:19:02" (3/3) ... [2019-11-15 23:19:02,690 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2019-11-15 23:19:02,699 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 23:19:02,709 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 23:19:02,719 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 23:19:02,744 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 23:19:02,745 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 23:19:02,745 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 23:19:02,745 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 23:19:02,745 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 23:19:02,745 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 23:19:02,746 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 23:19:02,746 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 23:19:02,762 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-11-15 23:19:02,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-15 23:19:02,770 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:19:02,770 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:19:02,773 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:19:02,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:19:02,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1957812527, now seen corresponding path program 1 times [2019-11-15 23:19:02,784 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:19:02,784 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869691945] [2019-11-15 23:19:02,784 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:19:02,784 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:19:02,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:19:02,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:19:02,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:19:02,871 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869691945] [2019-11-15 23:19:02,872 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:19:02,872 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-15 23:19:02,873 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584820743] [2019-11-15 23:19:02,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-15 23:19:02,877 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:19:02,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-15 23:19:02,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-15 23:19:02,890 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2019-11-15 23:19:02,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:19:02,903 INFO L93 Difference]: Finished difference Result 48 states and 71 transitions. [2019-11-15 23:19:02,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-15 23:19:02,904 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2019-11-15 23:19:02,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:19:02,913 INFO L225 Difference]: With dead ends: 48 [2019-11-15 23:19:02,913 INFO L226 Difference]: Without dead ends: 24 [2019-11-15 23:19:02,916 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-15 23:19:02,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-15 23:19:02,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-15 23:19:02,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-15 23:19:02,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2019-11-15 23:19:02,947 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 33 transitions. Word has length 12 [2019-11-15 23:19:02,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:19:02,947 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 33 transitions. [2019-11-15 23:19:02,947 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-15 23:19:02,947 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 33 transitions. [2019-11-15 23:19:02,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-15 23:19:02,948 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:19:02,948 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:19:02,949 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:19:02,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:19:02,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1580862863, now seen corresponding path program 1 times [2019-11-15 23:19:02,949 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:19:02,950 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5203865] [2019-11-15 23:19:02,950 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:19:02,950 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:19:02,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:19:02,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:19:02,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:19:02,995 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5203865] [2019-11-15 23:19:02,995 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:19:02,996 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-15 23:19:02,996 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967368697] [2019-11-15 23:19:02,997 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-15 23:19:02,997 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:19:02,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-15 23:19:02,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 23:19:02,998 INFO L87 Difference]: Start difference. First operand 24 states and 33 transitions. Second operand 3 states. [2019-11-15 23:19:03,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:19:03,049 INFO L93 Difference]: Finished difference Result 46 states and 64 transitions. [2019-11-15 23:19:03,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 23:19:03,050 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-15 23:19:03,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:19:03,051 INFO L225 Difference]: With dead ends: 46 [2019-11-15 23:19:03,052 INFO L226 Difference]: Without dead ends: 31 [2019-11-15 23:19:03,052 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 23:19:03,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-15 23:19:03,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2019-11-15 23:19:03,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-15 23:19:03,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2019-11-15 23:19:03,058 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 12 [2019-11-15 23:19:03,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:19:03,058 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2019-11-15 23:19:03,058 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-15 23:19:03,058 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2019-11-15 23:19:03,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-15 23:19:03,059 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:19:03,059 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:19:03,060 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:19:03,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:19:03,060 INFO L82 PathProgramCache]: Analyzing trace with hash -2031015874, now seen corresponding path program 1 times [2019-11-15 23:19:03,060 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:19:03,061 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188991923] [2019-11-15 23:19:03,061 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:19:03,061 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:19:03,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:19:03,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:19:03,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:19:03,146 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188991923] [2019-11-15 23:19:03,146 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155742671] [2019-11-15 23:19:03,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebd4707-88a7-4799-a284-e9790522edd0/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:19:03,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:19:03,254 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-15 23:19:03,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:19:03,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:19:03,287 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-15 23:19:03,287 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2019-11-15 23:19:03,287 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673712054] [2019-11-15 23:19:03,288 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-15 23:19:03,288 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:19:03,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-15 23:19:03,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-15 23:19:03,289 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 3 states. [2019-11-15 23:19:03,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:19:03,355 INFO L93 Difference]: Finished difference Result 53 states and 73 transitions. [2019-11-15 23:19:03,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 23:19:03,356 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-15 23:19:03,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:19:03,357 INFO L225 Difference]: With dead ends: 53 [2019-11-15 23:19:03,357 INFO L226 Difference]: Without dead ends: 31 [2019-11-15 23:19:03,357 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-15 23:19:03,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-15 23:19:03,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-15 23:19:03,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-15 23:19:03,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2019-11-15 23:19:03,361 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 19 [2019-11-15 23:19:03,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:19:03,362 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2019-11-15 23:19:03,362 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-15 23:19:03,362 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2019-11-15 23:19:03,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-15 23:19:03,363 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:19:03,363 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:19:03,563 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:19:03,564 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:19:03,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:19:03,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1772850436, now seen corresponding path program 1 times [2019-11-15 23:19:03,565 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:19:03,565 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779201079] [2019-11-15 23:19:03,565 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:19:03,565 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:19:03,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:19:03,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:19:03,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:19:03,617 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779201079] [2019-11-15 23:19:03,618 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124150238] [2019-11-15 23:19:03,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebd4707-88a7-4799-a284-e9790522edd0/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:19:03,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:19:03,692 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-15 23:19:03,694 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:19:03,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:19:03,711 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:19:03,711 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-15 23:19:03,711 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809964315] [2019-11-15 23:19:03,712 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 23:19:03,712 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:19:03,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 23:19:03,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-15 23:19:03,713 INFO L87 Difference]: Start difference. First operand 30 states and 40 transitions. Second operand 5 states. [2019-11-15 23:19:03,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:19:03,742 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2019-11-15 23:19:03,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 23:19:03,743 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-11-15 23:19:03,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:19:03,744 INFO L225 Difference]: With dead ends: 53 [2019-11-15 23:19:03,744 INFO L226 Difference]: Without dead ends: 38 [2019-11-15 23:19:03,744 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-15 23:19:03,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-15 23:19:03,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2019-11-15 23:19:03,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-15 23:19:03,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2019-11-15 23:19:03,750 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 19 [2019-11-15 23:19:03,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:19:03,750 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2019-11-15 23:19:03,750 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 23:19:03,751 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2019-11-15 23:19:03,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-15 23:19:03,752 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:19:03,752 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:19:03,955 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:19:03,956 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:19:03,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:19:03,956 INFO L82 PathProgramCache]: Analyzing trace with hash -282378703, now seen corresponding path program 1 times [2019-11-15 23:19:03,956 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:19:03,956 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079053304] [2019-11-15 23:19:03,957 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:19:03,957 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:19:03,957 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:19:03,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:19:04,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:19:04,043 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079053304] [2019-11-15 23:19:04,043 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130671407] [2019-11-15 23:19:04,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebd4707-88a7-4799-a284-e9790522edd0/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:19:04,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:19:04,139 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-15 23:19:04,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:19:04,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:19:04,154 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:19:04,154 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-15 23:19:04,154 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063611637] [2019-11-15 23:19:04,155 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-15 23:19:04,155 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:19:04,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-15 23:19:04,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-15 23:19:04,156 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand 6 states. [2019-11-15 23:19:04,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:19:04,196 INFO L93 Difference]: Finished difference Result 60 states and 81 transitions. [2019-11-15 23:19:04,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 23:19:04,196 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-11-15 23:19:04,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:19:04,197 INFO L225 Difference]: With dead ends: 60 [2019-11-15 23:19:04,197 INFO L226 Difference]: Without dead ends: 45 [2019-11-15 23:19:04,198 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-15 23:19:04,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-15 23:19:04,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2019-11-15 23:19:04,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-15 23:19:04,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2019-11-15 23:19:04,204 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 26 [2019-11-15 23:19:04,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:19:04,204 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2019-11-15 23:19:04,204 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-15 23:19:04,205 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2019-11-15 23:19:04,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-15 23:19:04,206 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:19:04,206 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:19:04,406 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:19:04,407 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:19:04,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:19:04,407 INFO L82 PathProgramCache]: Analyzing trace with hash 700996956, now seen corresponding path program 2 times [2019-11-15 23:19:04,407 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:19:04,408 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263893392] [2019-11-15 23:19:04,408 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:19:04,408 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:19:04,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:19:04,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:19:04,528 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:19:04,528 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263893392] [2019-11-15 23:19:04,529 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604079526] [2019-11-15 23:19:04,529 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebd4707-88a7-4799-a284-e9790522edd0/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:19:04,617 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 23:19:04,628 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:19:04,630 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-15 23:19:04,633 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:19:04,652 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:19:04,652 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:19:04,652 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-15 23:19:04,653 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285580966] [2019-11-15 23:19:04,653 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-15 23:19:04,654 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:19:04,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-15 23:19:04,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-15 23:19:04,655 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand 7 states. [2019-11-15 23:19:04,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:19:04,717 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2019-11-15 23:19:04,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 23:19:04,718 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2019-11-15 23:19:04,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:19:04,719 INFO L225 Difference]: With dead ends: 67 [2019-11-15 23:19:04,719 INFO L226 Difference]: Without dead ends: 52 [2019-11-15 23:19:04,720 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-15 23:19:04,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-15 23:19:04,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2019-11-15 23:19:04,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-15 23:19:04,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2019-11-15 23:19:04,726 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 33 [2019-11-15 23:19:04,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:19:04,727 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2019-11-15 23:19:04,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-15 23:19:04,727 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2019-11-15 23:19:04,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-15 23:19:04,728 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:19:04,728 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:19:04,933 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:19:04,933 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:19:04,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:19:04,934 INFO L82 PathProgramCache]: Analyzing trace with hash -338892847, now seen corresponding path program 3 times [2019-11-15 23:19:04,934 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:19:04,934 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795974082] [2019-11-15 23:19:04,934 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:19:04,934 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:19:04,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:19:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:19:05,068 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:19:05,069 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795974082] [2019-11-15 23:19:05,069 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749691260] [2019-11-15 23:19:05,069 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebd4707-88a7-4799-a284-e9790522edd0/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 [2019-11-15 23:19:05,461 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-15 23:19:05,461 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:19:05,464 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-15 23:19:05,467 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:19:05,538 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 23:19:05,542 INFO L375 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 16 treesize of output 17 [2019-11-15 23:19:05,543 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 23:19:05,555 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 23:19:05,555 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 23:19:05,556 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:23 [2019-11-15 23:19:05,578 INFO L392 ElimStorePlain]: Different costs {2=[|v_#memory_int_17|], 10=[|v_#memory_int_19|]} [2019-11-15 23:19:05,583 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 23:19:05,600 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 23:19:05,610 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 23:19:05,614 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 23:19:05,615 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 23:19:05,617 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 23:19:05,618 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 23:19:05,620 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 23:19:05,622 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 23:19:05,624 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 23:19:05,625 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 23:19:05,627 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 23:19:05,629 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 23:19:05,629 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 41 [2019-11-15 23:19:05,630 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-15 23:19:05,651 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 23:19:05,651 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 23:19:05,652 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:66, output treesize:23 [2019-11-15 23:19:05,664 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 23:19:05,666 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 23:19:05,668 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 23:19:05,670 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 23:19:05,670 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2019-11-15 23:19:05,671 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 23:19:05,681 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 23:19:05,682 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 23:19:05,682 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:20 [2019-11-15 23:19:05,779 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 23:19:05,801 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-15 23:19:05,801 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-15 23:19:05,801 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 16 [2019-11-15 23:19:05,801 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351549048] [2019-11-15 23:19:05,802 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-15 23:19:05,802 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:19:05,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-15 23:19:05,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2019-11-15 23:19:05,803 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand 11 states. [2019-11-15 23:19:06,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:19:06,307 INFO L93 Difference]: Finished difference Result 72 states and 98 transitions. [2019-11-15 23:19:06,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-15 23:19:06,308 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2019-11-15 23:19:06,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:19:06,309 INFO L225 Difference]: With dead ends: 72 [2019-11-15 23:19:06,309 INFO L226 Difference]: Without dead ends: 59 [2019-11-15 23:19:06,310 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2019-11-15 23:19:06,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-15 23:19:06,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2019-11-15 23:19:06,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-15 23:19:06,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2019-11-15 23:19:06,316 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 40 [2019-11-15 23:19:06,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:19:06,317 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2019-11-15 23:19:06,317 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-15 23:19:06,317 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2019-11-15 23:19:06,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-15 23:19:06,318 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:19:06,318 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:19:06,521 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:19:06,522 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:19:06,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:19:06,522 INFO L82 PathProgramCache]: Analyzing trace with hash -337045805, now seen corresponding path program 1 times [2019-11-15 23:19:06,522 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:19:06,522 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584998985] [2019-11-15 23:19:06,522 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:19:06,522 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:19:06,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:19:06,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:19:06,662 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:19:06,663 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584998985] [2019-11-15 23:19:06,663 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231137127] [2019-11-15 23:19:06,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebd4707-88a7-4799-a284-e9790522edd0/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:19:06,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:19:06,763 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-15 23:19:06,765 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:19:06,787 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:19:06,788 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:19:06,788 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-15 23:19:06,788 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596467967] [2019-11-15 23:19:06,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-15 23:19:06,789 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:19:06,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-15 23:19:06,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-15 23:19:06,789 INFO L87 Difference]: Start difference. First operand 49 states and 64 transitions. Second operand 8 states. [2019-11-15 23:19:06,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:19:06,831 INFO L93 Difference]: Finished difference Result 74 states and 99 transitions. [2019-11-15 23:19:06,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-15 23:19:06,832 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2019-11-15 23:19:06,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:19:06,833 INFO L225 Difference]: With dead ends: 74 [2019-11-15 23:19:06,833 INFO L226 Difference]: Without dead ends: 56 [2019-11-15 23:19:06,833 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-15 23:19:06,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-15 23:19:06,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-15 23:19:06,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-15 23:19:06,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2019-11-15 23:19:06,839 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 73 transitions. Word has length 40 [2019-11-15 23:19:06,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:19:06,840 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 73 transitions. [2019-11-15 23:19:06,840 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-15 23:19:06,840 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 73 transitions. [2019-11-15 23:19:06,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-15 23:19:06,846 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:19:06,846 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:19:07,047 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:19:07,047 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:19:07,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:19:07,047 INFO L82 PathProgramCache]: Analyzing trace with hash 2038353598, now seen corresponding path program 2 times [2019-11-15 23:19:07,048 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:19:07,048 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902146002] [2019-11-15 23:19:07,048 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:19:07,048 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:19:07,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:19:07,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:19:07,486 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 45 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-15 23:19:07,486 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902146002] [2019-11-15 23:19:07,486 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841781783] [2019-11-15 23:19:07,487 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebd4707-88a7-4799-a284-e9790522edd0/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:19:07,576 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 23:19:07,576 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:19:07,578 INFO L256 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-15 23:19:07,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:19:07,596 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-15 23:19:07,597 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 23:19:07,598 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 23:19:07,599 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 23:19:07,599 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-15 23:19:07,643 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 23:19:07,644 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2019-11-15 23:19:07,644 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 23:19:07,646 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 23:19:07,647 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 23:19:07,647 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:4 [2019-11-15 23:19:07,682 INFO L341 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2019-11-15 23:19:07,683 INFO L375 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 1 case distinctions, treesize of input 16 treesize of output 17 [2019-11-15 23:19:07,683 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 23:19:07,694 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 23:19:07,695 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 23:19:07,695 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:21 [2019-11-15 23:19:07,726 INFO L392 ElimStorePlain]: Different costs {2=[|v_#memory_int_21|], 10=[|v_#memory_int_23|]} [2019-11-15 23:19:07,732 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 23:19:07,745 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 23:19:07,826 INFO L341 Elim1Store]: treesize reduction 288, result has 10.8 percent of original size [2019-11-15 23:19:07,827 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 41 [2019-11-15 23:19:07,827 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-15 23:19:07,835 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 23:19:07,836 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 23:19:07,836 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:64, output treesize:21 [2019-11-15 23:19:07,843 INFO L341 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2019-11-15 23:19:07,844 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2019-11-15 23:19:07,846 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 23:19:07,852 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 23:19:07,853 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 23:19:07,853 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:17 [2019-11-15 23:19:07,982 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 23:19:07,991 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 44 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-15 23:19:07,992 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:19:07,992 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-11-15 23:19:07,992 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51781303] [2019-11-15 23:19:07,996 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-15 23:19:07,996 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:19:07,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-15 23:19:07,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2019-11-15 23:19:07,997 INFO L87 Difference]: Start difference. First operand 56 states and 73 transitions. Second operand 20 states. [2019-11-15 23:19:08,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:19:08,929 INFO L93 Difference]: Finished difference Result 86 states and 115 transitions. [2019-11-15 23:19:08,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-15 23:19:08,929 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2019-11-15 23:19:08,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:19:08,930 INFO L225 Difference]: With dead ends: 86 [2019-11-15 23:19:08,931 INFO L226 Difference]: Without dead ends: 73 [2019-11-15 23:19:08,931 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2019-11-15 23:19:08,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-15 23:19:08,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 58. [2019-11-15 23:19:08,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-15 23:19:08,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 75 transitions. [2019-11-15 23:19:08,937 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 75 transitions. Word has length 47 [2019-11-15 23:19:08,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:19:08,937 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 75 transitions. [2019-11-15 23:19:08,937 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-15 23:19:08,937 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 75 transitions. [2019-11-15 23:19:08,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-15 23:19:08,938 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:19:08,938 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:19:09,148 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:19:09,148 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:19:09,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:19:09,148 INFO L82 PathProgramCache]: Analyzing trace with hash 2038355520, now seen corresponding path program 1 times [2019-11-15 23:19:09,149 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:19:09,149 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573242107] [2019-11-15 23:19:09,149 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:19:09,149 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:19:09,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:19:09,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 23:19:09,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 23:19:09,679 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 23:19:09,679 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-11-15 23:19:09,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.11 11:19:09 BoogieIcfgContainer [2019-11-15 23:19:09,722 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-15 23:19:09,722 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 23:19:09,722 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 23:19:09,722 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 23:19:09,723 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:19:02" (3/4) ... [2019-11-15 23:19:09,725 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-15 23:19:09,795 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_4ebd4707-88a7-4799-a284-e9790522edd0/bin/uautomizer/witness.graphml [2019-11-15 23:19:09,795 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 23:19:09,797 INFO L168 Benchmark]: Toolchain (without parser) took 8274.57 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 288.4 MB). Free memory was 940.8 MB in the beginning and 1.2 GB in the end (delta: -238.3 MB). Peak memory consumption was 50.1 MB. Max. memory is 11.5 GB. [2019-11-15 23:19:09,800 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 23:19:09,800 INFO L168 Benchmark]: CACSL2BoogieTranslator took 523.15 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.7 MB). Free memory was 940.8 MB in the beginning and 1.1 GB in the end (delta: -184.8 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. [2019-11-15 23:19:09,801 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.61 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 23:19:09,801 INFO L168 Benchmark]: Boogie Preprocessor took 54.24 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 23:19:09,801 INFO L168 Benchmark]: RCFGBuilder took 522.18 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.7 MB). Peak memory consumption was 27.7 MB. Max. memory is 11.5 GB. [2019-11-15 23:19:09,802 INFO L168 Benchmark]: TraceAbstraction took 7041.27 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 132.6 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -92.9 MB). Peak memory consumption was 39.7 MB. Max. memory is 11.5 GB. [2019-11-15 23:19:09,802 INFO L168 Benchmark]: Witness Printer took 73.43 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 11.5 GB. [2019-11-15 23:19:09,804 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 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 523.15 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.7 MB). Free memory was 940.8 MB in the beginning and 1.1 GB in the end (delta: -184.8 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 56.61 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 54.24 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 522.18 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.7 MB). Peak memory consumption was 27.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 7041.27 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 132.6 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -92.9 MB). Peak memory consumption was 39.7 MB. Max. memory is 11.5 GB. * Witness Printer took 73.43 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 605]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L588] const int len = 5; [L568] DLL head = ((void *)0); [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND FALSE !(\read(head)) [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND FALSE !(len > 0) [L585] return head; [L589] DLL head = dll_create(len); [L590] head->next [L590] COND TRUE head->next [L591] EXPR head->data_0 [L591] EXPR 0 != head->data_0 || 0 != head->data_1 [L591] EXPR head->data_1 [L591] EXPR 0 != head->data_0 || 0 != head->data_1 [L591] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L591] EXPR head->data_2 [L591] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L591] COND TRUE 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L605] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 1 error locations. Result: UNSAFE, OverallTime: 6.9s, OverallIterations: 10, TraceHistogramMax: 5, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 250 SDtfs, 703 SDslu, 612 SDs, 0 SdLazy, 439 SolverSat, 105 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 292 GetRequests, 220 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=58occurred in iteration=9, 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, 9 MinimizatonAttempts, 50 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 519 NumberOfCodeBlocks, 512 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 456 ConstructedInterpolants, 0 QuantifiedInterpolants, 53687 SizeOfPredicates, 46 NumberOfNonLiveVariables, 1058 ConjunctsInSsa, 90 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 178/404 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 proved your program to be incorrect! Received shutdown request...