./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/string_false-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/string_false-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 77cd31699320cd40da64f32a92959020d19291bd ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/string_false-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 77cd31699320cd40da64f32a92959020d19291bd ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 0.1.23-635dfa2 [2018-12-09 09:56:24,520 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 09:56:24,522 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 09:56:24,528 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 09:56:24,528 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 09:56:24,529 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 09:56:24,530 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 09:56:24,531 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 09:56:24,532 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 09:56:24,533 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 09:56:24,533 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 09:56:24,533 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 09:56:24,534 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 09:56:24,535 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 09:56:24,535 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 09:56:24,536 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 09:56:24,536 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 09:56:24,538 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 09:56:24,539 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 09:56:24,540 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 09:56:24,541 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 09:56:24,541 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 09:56:24,543 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 09:56:24,543 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 09:56:24,543 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 09:56:24,544 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 09:56:24,544 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 09:56:24,545 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 09:56:24,545 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 09:56:24,546 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 09:56:24,546 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 09:56:24,546 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 09:56:24,546 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 09:56:24,547 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 09:56:24,547 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 09:56:24,548 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 09:56:24,548 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-09 09:56:24,555 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 09:56:24,556 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 09:56:24,556 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 09:56:24,556 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 09:56:24,556 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 09:56:24,556 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 09:56:24,556 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 09:56:24,556 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-09 09:56:24,557 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 09:56:24,557 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 09:56:24,557 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-09 09:56:24,557 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-09 09:56:24,557 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 09:56:24,557 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 09:56:24,557 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 09:56:24,557 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 09:56:24,558 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 09:56:24,558 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 09:56:24,558 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-09 09:56:24,558 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 09:56:24,558 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-09 09:56:24,558 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 09:56:24,558 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 09:56:24,559 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-09 09:56:24,559 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 09:56:24,559 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 09:56:24,559 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 09:56:24,559 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 09:56:24,559 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 09:56:24,559 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 09:56:24,559 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 09:56:24,560 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-09 09:56:24,560 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-09 09:56:24,560 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 09:56:24,560 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 09:56:24,560 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-09 09:56:24,560 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan 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 -> Taipan 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 -> 77cd31699320cd40da64f32a92959020d19291bd [2018-12-09 09:56:24,583 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 09:56:24,591 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 09:56:24,593 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 09:56:24,594 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 09:56:24,594 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 09:56:24,595 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan/../../sv-benchmarks/c/loops/string_false-unreach-call_true-termination.i [2018-12-09 09:56:24,630 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan/data/f9b31a3bd/a667e9f20f2045c885349e9699f36837/FLAG884621798 [2018-12-09 09:56:25,034 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 09:56:25,034 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/sv-benchmarks/c/loops/string_false-unreach-call_true-termination.i [2018-12-09 09:56:25,037 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan/data/f9b31a3bd/a667e9f20f2045c885349e9699f36837/FLAG884621798 [2018-12-09 09:56:25,454 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan/data/f9b31a3bd/a667e9f20f2045c885349e9699f36837 [2018-12-09 09:56:25,456 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 09:56:25,457 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 09:56:25,457 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 09:56:25,458 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 09:56:25,460 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 09:56:25,460 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:56:25" (1/1) ... [2018-12-09 09:56:25,462 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bf82b32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:56:25, skipping insertion in model container [2018-12-09 09:56:25,462 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:56:25" (1/1) ... [2018-12-09 09:56:25,467 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 09:56:25,478 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 09:56:25,570 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 09:56:25,572 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 09:56:25,585 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 09:56:25,596 INFO L195 MainTranslator]: Completed translation [2018-12-09 09:56:25,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:56:25 WrapperNode [2018-12-09 09:56:25,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 09:56:25,597 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 09:56:25,597 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 09:56:25,597 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 09:56:25,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:56:25" (1/1) ... [2018-12-09 09:56:25,607 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:56:25" (1/1) ... [2018-12-09 09:56:25,611 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 09:56:25,611 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 09:56:25,611 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 09:56:25,611 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 09:56:25,647 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:56:25" (1/1) ... [2018-12-09 09:56:25,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:56:25" (1/1) ... [2018-12-09 09:56:25,649 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:56:25" (1/1) ... [2018-12-09 09:56:25,649 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:56:25" (1/1) ... [2018-12-09 09:56:25,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:56:25" (1/1) ... [2018-12-09 09:56:25,658 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:56:25" (1/1) ... [2018-12-09 09:56:25,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:56:25" (1/1) ... [2018-12-09 09:56:25,661 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 09:56:25,661 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 09:56:25,661 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 09:56:25,661 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 09:56:25,662 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:56:25" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan/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 [2018-12-09 09:56:25,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-09 09:56:25,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 09:56:25,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 09:56:25,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-09 09:56:25,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 09:56:25,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 09:56:25,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-09 09:56:25,693 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 09:56:25,693 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 09:56:25,693 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-12-09 09:56:25,693 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-12-09 09:56:25,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-09 09:56:25,823 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 09:56:25,823 INFO L280 CfgBuilder]: Removed 5 assue(true) statements. [2018-12-09 09:56:25,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:56:25 BoogieIcfgContainer [2018-12-09 09:56:25,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 09:56:25,824 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 09:56:25,824 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 09:56:25,826 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 09:56:25,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 09:56:25" (1/3) ... [2018-12-09 09:56:25,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65e18809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:56:25, skipping insertion in model container [2018-12-09 09:56:25,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:56:25" (2/3) ... [2018-12-09 09:56:25,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65e18809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:56:25, skipping insertion in model container [2018-12-09 09:56:25,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:56:25" (3/3) ... [2018-12-09 09:56:25,828 INFO L112 eAbstractionObserver]: Analyzing ICFG string_false-unreach-call_true-termination.i [2018-12-09 09:56:25,834 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 09:56:25,839 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-09 09:56:25,849 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-09 09:56:25,868 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 09:56:25,868 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-09 09:56:25,868 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 09:56:25,868 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 09:56:25,868 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 09:56:25,868 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 09:56:25,869 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 09:56:25,869 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 09:56:25,879 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2018-12-09 09:56:25,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-09 09:56:25,883 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:56:25,883 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:56:25,884 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 09:56:25,887 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:56:25,887 INFO L82 PathProgramCache]: Analyzing trace with hash -99599224, now seen corresponding path program 1 times [2018-12-09 09:56:25,889 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:56:25,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:56:25,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:56:25,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:56:25,917 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:56:25,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:56:25,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:56:25,961 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 09:56:25,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 09:56:25,961 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 09:56:25,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-09 09:56:25,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-09 09:56:25,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-09 09:56:25,973 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2018-12-09 09:56:25,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:56:25,985 INFO L93 Difference]: Finished difference Result 62 states and 89 transitions. [2018-12-09 09:56:25,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-09 09:56:25,986 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2018-12-09 09:56:25,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:56:25,991 INFO L225 Difference]: With dead ends: 62 [2018-12-09 09:56:25,991 INFO L226 Difference]: Without dead ends: 28 [2018-12-09 09:56:25,992 INFO L631 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 [2018-12-09 09:56:26,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-09 09:56:26,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-12-09 09:56:26,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-12-09 09:56:26,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2018-12-09 09:56:26,013 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 22 [2018-12-09 09:56:26,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:56:26,013 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2018-12-09 09:56:26,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-09 09:56:26,014 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2018-12-09 09:56:26,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-12-09 09:56:26,014 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:56:26,014 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:56:26,014 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 09:56:26,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:56:26,015 INFO L82 PathProgramCache]: Analyzing trace with hash 930552028, now seen corresponding path program 1 times [2018-12-09 09:56:26,015 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:56:26,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:56:26,016 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:56:26,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:56:26,016 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:56:26,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:56:26,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:56:26,055 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 09:56:26,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-09 09:56:26,055 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 09:56:26,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 09:56:26,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 09:56:26,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 09:56:26,057 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 3 states. [2018-12-09 09:56:26,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:56:26,084 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2018-12-09 09:56:26,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 09:56:26,084 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2018-12-09 09:56:26,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:56:26,086 INFO L225 Difference]: With dead ends: 56 [2018-12-09 09:56:26,086 INFO L226 Difference]: Without dead ends: 36 [2018-12-09 09:56:26,086 INFO L631 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 [2018-12-09 09:56:26,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-09 09:56:26,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2018-12-09 09:56:26,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-09 09:56:26,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2018-12-09 09:56:26,091 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 24 [2018-12-09 09:56:26,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:56:26,091 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2018-12-09 09:56:26,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 09:56:26,091 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2018-12-09 09:56:26,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-12-09 09:56:26,091 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:56:26,091 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:56:26,092 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 09:56:26,092 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:56:26,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1358146588, now seen corresponding path program 1 times [2018-12-09 09:56:26,092 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:56:26,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:56:26,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:56:26,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:56:26,093 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:56:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:56:26,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 09:56:26,127 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:56:26,127 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 09:56:26,128 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 29 with the following transitions: [2018-12-09 09:56:26,129 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [11], [13], [15], [19], [23], [29], [31], [33], [37], [41], [46], [49], [55], [60], [63], [72], [79], [91], [95], [98], [100], [106], [107], [108], [110] [2018-12-09 09:56:26,148 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 09:56:26,148 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 09:56:26,283 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 09:56:26,284 INFO L272 AbstractInterpreter]: Visited 28 different actions 57 times. Merged at 12 different actions 22 times. Widened at 1 different actions 1 times. Performed 298 root evaluator evaluations with a maximum evaluation depth of 5. Performed 298 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 5 fixpoints after 5 different actions. Largest state had 27 variables. [2018-12-09 09:56:26,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:56:26,291 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 09:56:26,291 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:56:26,291 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 09:56:26,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:56:26,297 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 09:56:26,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:56:26,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:56:26,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 09:56:26,337 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 09:56:26,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 09:56:26,378 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 09:56:26,379 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2018-12-09 09:56:26,379 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 09:56:26,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 09:56:26,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 09:56:26,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-12-09 09:56:26,380 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2018-12-09 09:56:26,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:56:26,415 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2018-12-09 09:56:26,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 09:56:26,415 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2018-12-09 09:56:26,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:56:26,415 INFO L225 Difference]: With dead ends: 65 [2018-12-09 09:56:26,415 INFO L226 Difference]: Without dead ends: 44 [2018-12-09 09:56:26,416 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-12-09 09:56:26,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-12-09 09:56:26,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2018-12-09 09:56:26,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-09 09:56:26,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2018-12-09 09:56:26,419 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 28 [2018-12-09 09:56:26,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:56:26,419 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2018-12-09 09:56:26,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 09:56:26,419 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2018-12-09 09:56:26,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-12-09 09:56:26,419 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:56:26,419 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:56:26,420 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 09:56:26,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:56:26,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1752396196, now seen corresponding path program 2 times [2018-12-09 09:56:26,420 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:56:26,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:56:26,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:56:26,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:56:26,421 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:56:26,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:56:26,458 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-09 09:56:26,459 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:56:26,459 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 09:56:26,459 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 09:56:26,459 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 09:56:26,459 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:56:26,459 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 09:56:26,465 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 09:56:26,466 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 09:56:26,480 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-09 09:56:26,480 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 09:56:26,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:56:26,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-09 09:56:26,488 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 09:56:26,508 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-09 09:56:26,522 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 09:56:26,522 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2018-12-09 09:56:26,522 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 09:56:26,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 09:56:26,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 09:56:26,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-09 09:56:26,523 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 6 states. [2018-12-09 09:56:26,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:56:26,563 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2018-12-09 09:56:26,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 09:56:26,563 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2018-12-09 09:56:26,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:56:26,564 INFO L225 Difference]: With dead ends: 75 [2018-12-09 09:56:26,564 INFO L226 Difference]: Without dead ends: 52 [2018-12-09 09:56:26,564 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-09 09:56:26,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-12-09 09:56:26,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 38. [2018-12-09 09:56:26,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-12-09 09:56:26,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2018-12-09 09:56:26,567 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 32 [2018-12-09 09:56:26,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:56:26,568 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2018-12-09 09:56:26,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 09:56:26,568 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2018-12-09 09:56:26,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-12-09 09:56:26,568 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:56:26,568 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:56:26,568 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 09:56:26,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:56:26,569 INFO L82 PathProgramCache]: Analyzing trace with hash -800948324, now seen corresponding path program 3 times [2018-12-09 09:56:26,569 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:56:26,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:56:26,569 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 09:56:26,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:56:26,570 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:56:26,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:56:26,608 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-12-09 09:56:26,608 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:56:26,608 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 09:56:26,608 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 09:56:26,608 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 09:56:26,608 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:56:26,608 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 09:56:26,614 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 09:56:26,614 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 09:56:26,626 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 09:56:26,627 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 09:56:26,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:56:26,635 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-12-09 09:56:26,635 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 09:56:26,658 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-12-09 09:56:26,673 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 09:56:26,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2018-12-09 09:56:26,673 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 09:56:26,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-09 09:56:26,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-09 09:56:26,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-09 09:56:26,674 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 7 states. [2018-12-09 09:56:26,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:56:26,730 INFO L93 Difference]: Finished difference Result 85 states and 104 transitions. [2018-12-09 09:56:26,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 09:56:26,730 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2018-12-09 09:56:26,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:56:26,731 INFO L225 Difference]: With dead ends: 85 [2018-12-09 09:56:26,731 INFO L226 Difference]: Without dead ends: 60 [2018-12-09 09:56:26,731 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-09 09:56:26,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-12-09 09:56:26,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2018-12-09 09:56:26,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-12-09 09:56:26,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2018-12-09 09:56:26,735 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 36 [2018-12-09 09:56:26,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:56:26,735 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2018-12-09 09:56:26,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-09 09:56:26,735 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2018-12-09 09:56:26,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-12-09 09:56:26,736 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:56:26,736 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:56:26,736 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 09:56:26,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:56:26,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1655062492, now seen corresponding path program 4 times [2018-12-09 09:56:26,736 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:56:26,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:56:26,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 09:56:26,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:56:26,737 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:56:26,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:56:26,797 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-12-09 09:56:26,797 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:56:26,797 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 09:56:26,797 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 09:56:26,797 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 09:56:26,797 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:56:26,797 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 09:56:26,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:56:26,803 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 09:56:26,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:56:26,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:56:26,830 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-12-09 09:56:26,830 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 09:56:26,852 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-12-09 09:56:26,876 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 09:56:26,876 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2018-12-09 09:56:26,876 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 09:56:26,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-09 09:56:26,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-09 09:56:26,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-09 09:56:26,877 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 8 states. [2018-12-09 09:56:26,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:56:26,936 INFO L93 Difference]: Finished difference Result 93 states and 114 transitions. [2018-12-09 09:56:26,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 09:56:26,936 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2018-12-09 09:56:26,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:56:26,937 INFO L225 Difference]: With dead ends: 93 [2018-12-09 09:56:26,937 INFO L226 Difference]: Without dead ends: 66 [2018-12-09 09:56:26,937 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 75 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-09 09:56:26,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-12-09 09:56:26,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2018-12-09 09:56:26,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-12-09 09:56:26,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2018-12-09 09:56:26,940 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 40 [2018-12-09 09:56:26,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:56:26,940 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2018-12-09 09:56:26,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-09 09:56:26,940 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2018-12-09 09:56:26,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-12-09 09:56:26,941 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:56:26,941 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:56:26,941 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 09:56:26,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:56:26,941 INFO L82 PathProgramCache]: Analyzing trace with hash 349736732, now seen corresponding path program 5 times [2018-12-09 09:56:26,942 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 09:56:26,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:56:26,942 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:56:26,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:56:26,942 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 09:56:26,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 09:56:26,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 09:56:26,987 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-09 09:56:27,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 09:56:27 BoogieIcfgContainer [2018-12-09 09:56:27,011 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 09:56:27,011 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 09:56:27,012 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 09:56:27,012 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 09:56:27,012 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:56:25" (3/4) ... [2018-12-09 09:56:27,014 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-09 09:56:27,015 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 09:56:27,015 INFO L168 Benchmark]: Toolchain (without parser) took 1558.72 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 123.2 MB). Free memory was 952.4 MB in the beginning and 881.0 MB in the end (delta: 71.4 MB). Peak memory consumption was 194.6 MB. Max. memory is 11.5 GB. [2018-12-09 09:56:27,016 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 09:56:27,016 INFO L168 Benchmark]: CACSL2BoogieTranslator took 139.29 ms. Allocated memory is still 1.0 GB. Free memory was 952.4 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-09 09:56:27,017 INFO L168 Benchmark]: Boogie Procedure Inliner took 14.22 ms. Allocated memory is still 1.0 GB. Free memory was 941.6 MB in the beginning and 936.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-12-09 09:56:27,017 INFO L168 Benchmark]: Boogie Preprocessor took 49.58 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 123.2 MB). Free memory was 936.3 MB in the beginning and 1.1 GB in the end (delta: -175.7 MB). Peak memory consumption was 12.9 MB. Max. memory is 11.5 GB. [2018-12-09 09:56:27,017 INFO L168 Benchmark]: RCFGBuilder took 162.82 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: 17.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. [2018-12-09 09:56:27,018 INFO L168 Benchmark]: TraceAbstraction took 1186.95 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 881.0 MB in the end (delta: 213.1 MB). Peak memory consumption was 213.1 MB. Max. memory is 11.5 GB. [2018-12-09 09:56:27,018 INFO L168 Benchmark]: Witness Printer took 3.14 ms. Allocated memory is still 1.2 GB. Free memory is still 881.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 09:56:27,020 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 139.29 ms. Allocated memory is still 1.0 GB. Free memory was 952.4 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 14.22 ms. Allocated memory is still 1.0 GB. Free memory was 941.6 MB in the beginning and 936.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 49.58 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 123.2 MB). Free memory was 936.3 MB in the beginning and 1.1 GB in the end (delta: -175.7 MB). Peak memory consumption was 12.9 MB. Max. memory is 11.5 GB. * RCFGBuilder took 162.82 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: 17.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1186.95 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 881.0 MB in the end (delta: 213.1 MB). Peak memory consumption was 213.1 MB. Max. memory is 11.5 GB. * Witness Printer took 3.14 ms. Allocated memory is still 1.2 GB. Free memory is still 881.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 6]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of shiftLeft at line 55. Possible FailurePath: [L17] char string_A[5], string_B[5]; [L18] int i, j, nc_A, nc_B, found=0; [L21] i=0 VAL [found=0, i=0, string_A={7:0}, string_B={10:0}] [L21] COND TRUE i<5 [L22] string_A[i]=__VERIFIER_nondet_char() [L21] i++ VAL [found=0, i=1, string_A={7:0}, string_B={10:0}] [L21] COND TRUE i<5 [L22] string_A[i]=__VERIFIER_nondet_char() [L21] i++ VAL [found=0, i=2, string_A={7:0}, string_B={10:0}] [L21] COND TRUE i<5 [L22] string_A[i]=__VERIFIER_nondet_char() [L21] i++ VAL [found=0, i=3, string_A={7:0}, string_B={10:0}] [L21] COND TRUE i<5 [L22] string_A[i]=__VERIFIER_nondet_char() [L21] i++ VAL [found=0, i=4, string_A={7:0}, string_B={10:0}] [L21] COND TRUE i<5 [L22] string_A[i]=__VERIFIER_nondet_char() [L21] i++ VAL [found=0, i=5, string_A={7:0}, string_B={10:0}] [L21] COND FALSE !(i<5) VAL [found=0, i=5, string_A={7:0}, string_B={10:0}] [L23] EXPR string_A[5 -1] VAL [found=0, i=5, string_A={7:0}, string_A[5 -1]=0, string_B={10:0}] [L23] COND FALSE !(!(string_A[5 -1]=='\0')) [L25] i=0 VAL [found=0, i=0, string_A={7:0}, string_B={10:0}] [L25] COND TRUE i<5 [L26] string_B[i]=__VERIFIER_nondet_char() [L25] i++ VAL [found=0, i=1, string_A={7:0}, string_B={10:0}] [L25] COND TRUE i<5 [L26] string_B[i]=__VERIFIER_nondet_char() [L25] i++ VAL [found=0, i=2, string_A={7:0}, string_B={10:0}] [L25] COND TRUE i<5 [L26] string_B[i]=__VERIFIER_nondet_char() [L25] i++ VAL [found=0, i=3, string_A={7:0}, string_B={10:0}] [L25] COND TRUE i<5 [L26] string_B[i]=__VERIFIER_nondet_char() [L25] i++ VAL [found=0, i=4, string_A={7:0}, string_B={10:0}] [L25] COND TRUE i<5 [L26] string_B[i]=__VERIFIER_nondet_char() [L25] i++ VAL [found=0, i=5, string_A={7:0}, string_B={10:0}] [L25] COND FALSE !(i<5) VAL [found=0, i=5, string_A={7:0}, string_B={10:0}] [L27] EXPR string_B[5 -1] VAL [found=0, i=5, string_A={7:0}, string_B={10:0}, string_B[5 -1]=0] [L27] COND FALSE !(!(string_B[5 -1]=='\0')) [L29] nc_A = 0 VAL [found=0, i=5, nc_A=0, string_A={7:0}, string_B={10:0}] [L30] EXPR string_A[nc_A] VAL [found=0, i=5, nc_A=0, string_A={7:0}, string_A[nc_A]=0, string_B={10:0}] [L30] COND FALSE !(string_A[nc_A]!='\0') [L33] nc_B = 0 VAL [found=0, i=5, nc_A=0, nc_B=0, string_A={7:0}, string_B={10:0}] [L34] EXPR string_B[nc_B] VAL [found=0, i=5, nc_A=0, nc_B=0, string_A={7:0}, string_B={10:0}, string_B[nc_B]=0] [L34] COND FALSE !(string_B[nc_B]!='\0') [L37] COND FALSE !(!(nc_B >= nc_A)) [L40] EXPR j=0 [L40] i=j=0 VAL [found=0, i=0, j=0, nc_A=0, nc_B=0, string_A={7:0}, string_B={10:0}] [L41] COND FALSE !((inc_B-1)< main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan 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 -> Taipan 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 -> 77cd31699320cd40da64f32a92959020d19291bd [2018-12-09 09:56:28,333 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 09:56:28,343 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 09:56:28,345 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 09:56:28,347 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 09:56:28,347 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 09:56:28,347 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan/../../sv-benchmarks/c/loops/string_false-unreach-call_true-termination.i [2018-12-09 09:56:28,392 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan/data/74238309d/43389d79e12046a989d4bc669de7a09a/FLAG898006305 [2018-12-09 09:56:28,704 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 09:56:28,704 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/sv-benchmarks/c/loops/string_false-unreach-call_true-termination.i [2018-12-09 09:56:28,708 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan/data/74238309d/43389d79e12046a989d4bc669de7a09a/FLAG898006305 [2018-12-09 09:56:29,119 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan/data/74238309d/43389d79e12046a989d4bc669de7a09a [2018-12-09 09:56:29,121 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 09:56:29,122 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 09:56:29,122 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 09:56:29,122 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 09:56:29,124 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 09:56:29,125 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:56:29" (1/1) ... [2018-12-09 09:56:29,126 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c77677b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:56:29, skipping insertion in model container [2018-12-09 09:56:29,127 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:56:29" (1/1) ... [2018-12-09 09:56:29,130 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 09:56:29,140 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 09:56:29,233 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 09:56:29,236 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 09:56:29,252 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 09:56:29,265 INFO L195 MainTranslator]: Completed translation [2018-12-09 09:56:29,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:56:29 WrapperNode [2018-12-09 09:56:29,265 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 09:56:29,266 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 09:56:29,266 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 09:56:29,266 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 09:56:29,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:56:29" (1/1) ... [2018-12-09 09:56:29,277 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:56:29" (1/1) ... [2018-12-09 09:56:29,281 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 09:56:29,281 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 09:56:29,281 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 09:56:29,281 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 09:56:29,287 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:56:29" (1/1) ... [2018-12-09 09:56:29,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:56:29" (1/1) ... [2018-12-09 09:56:29,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:56:29" (1/1) ... [2018-12-09 09:56:29,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:56:29" (1/1) ... [2018-12-09 09:56:29,294 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:56:29" (1/1) ... [2018-12-09 09:56:29,298 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:56:29" (1/1) ... [2018-12-09 09:56:29,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:56:29" (1/1) ... [2018-12-09 09:56:29,301 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 09:56:29,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 09:56:29,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 09:56:29,301 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 09:56:29,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:56:29" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan/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 [2018-12-09 09:56:29,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 09:56:29,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 09:56:29,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-09 09:56:29,363 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2018-12-09 09:56:29,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 09:56:29,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 09:56:29,363 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 09:56:29,363 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 09:56:29,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-12-09 09:56:29,363 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-12-09 09:56:29,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2018-12-09 09:56:29,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-09 09:56:29,512 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 09:56:29,513 INFO L280 CfgBuilder]: Removed 5 assue(true) statements. [2018-12-09 09:56:29,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:56:29 BoogieIcfgContainer [2018-12-09 09:56:29,513 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 09:56:29,513 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 09:56:29,513 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 09:56:29,515 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 09:56:29,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 09:56:29" (1/3) ... [2018-12-09 09:56:29,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62740fc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:56:29, skipping insertion in model container [2018-12-09 09:56:29,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:56:29" (2/3) ... [2018-12-09 09:56:29,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62740fc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:56:29, skipping insertion in model container [2018-12-09 09:56:29,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:56:29" (3/3) ... [2018-12-09 09:56:29,517 INFO L112 eAbstractionObserver]: Analyzing ICFG string_false-unreach-call_true-termination.i [2018-12-09 09:56:29,523 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 09:56:29,527 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-09 09:56:29,536 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-09 09:56:29,554 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-09 09:56:29,554 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 09:56:29,554 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-09 09:56:29,554 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 09:56:29,554 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 09:56:29,554 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 09:56:29,554 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 09:56:29,555 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 09:56:29,555 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 09:56:29,564 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2018-12-09 09:56:29,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-09 09:56:29,567 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:56:29,568 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:56:29,569 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 09:56:29,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:56:29,572 INFO L82 PathProgramCache]: Analyzing trace with hash -99599224, now seen corresponding path program 1 times [2018-12-09 09:56:29,574 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 09:56:29,575 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 09:56:29,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:56:29,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:56:29,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:56:29,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:56:29,633 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 09:56:29,635 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 09:56:29,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 09:56:29,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-09 09:56:29,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-09 09:56:29,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-09 09:56:29,647 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2018-12-09 09:56:29,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:56:29,661 INFO L93 Difference]: Finished difference Result 62 states and 89 transitions. [2018-12-09 09:56:29,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-09 09:56:29,662 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2018-12-09 09:56:29,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:56:29,667 INFO L225 Difference]: With dead ends: 62 [2018-12-09 09:56:29,667 INFO L226 Difference]: Without dead ends: 28 [2018-12-09 09:56:29,669 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-09 09:56:29,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-09 09:56:29,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-12-09 09:56:29,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-12-09 09:56:29,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2018-12-09 09:56:29,691 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 22 [2018-12-09 09:56:29,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:56:29,692 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2018-12-09 09:56:29,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-09 09:56:29,692 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2018-12-09 09:56:29,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-12-09 09:56:29,693 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:56:29,693 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:56:29,693 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 09:56:29,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:56:29,693 INFO L82 PathProgramCache]: Analyzing trace with hash 930552028, now seen corresponding path program 1 times [2018-12-09 09:56:29,694 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 09:56:29,694 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 09:56:29,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:56:29,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:56:29,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:56:29,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:56:29,760 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 09:56:29,761 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 09:56:29,761 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-09 09:56:29,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 09:56:29,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 09:56:29,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 09:56:29,763 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 3 states. [2018-12-09 09:56:29,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:56:29,810 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2018-12-09 09:56:29,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 09:56:29,811 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2018-12-09 09:56:29,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:56:29,813 INFO L225 Difference]: With dead ends: 56 [2018-12-09 09:56:29,813 INFO L226 Difference]: Without dead ends: 36 [2018-12-09 09:56:29,813 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 09:56:29,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-09 09:56:29,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2018-12-09 09:56:29,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-09 09:56:29,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2018-12-09 09:56:29,818 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 24 [2018-12-09 09:56:29,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:56:29,818 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2018-12-09 09:56:29,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 09:56:29,818 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2018-12-09 09:56:29,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-12-09 09:56:29,818 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:56:29,818 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:56:29,819 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 09:56:29,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:56:29,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1358146588, now seen corresponding path program 1 times [2018-12-09 09:56:29,819 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 09:56:29,819 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 09:56:29,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:56:29,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:56:29,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:56:29,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 09:56:29,882 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 09:56:29,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 09:56:29,908 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:56:29,908 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 09:56:29,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:56:29,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:56:29,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:56:29,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 09:56:29,937 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 09:56:29,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 09:56:29,956 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-09 09:56:29,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4] total 6 [2018-12-09 09:56:29,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 09:56:29,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 09:56:29,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-12-09 09:56:29,957 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 6 states. [2018-12-09 09:56:30,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:56:30,108 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2018-12-09 09:56:30,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 09:56:30,109 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2018-12-09 09:56:30,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:56:30,110 INFO L225 Difference]: With dead ends: 79 [2018-12-09 09:56:30,110 INFO L226 Difference]: Without dead ends: 58 [2018-12-09 09:56:30,110 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-09 09:56:30,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-12-09 09:56:30,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 42. [2018-12-09 09:56:30,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-12-09 09:56:30,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2018-12-09 09:56:30,114 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 28 [2018-12-09 09:56:30,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:56:30,115 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2018-12-09 09:56:30,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 09:56:30,115 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2018-12-09 09:56:30,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-12-09 09:56:30,115 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:56:30,115 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:56:30,116 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 09:56:30,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:56:30,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1655062492, now seen corresponding path program 2 times [2018-12-09 09:56:30,116 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 09:56:30,116 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 09:56:30,129 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-12-09 09:56:30,163 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-12-09 09:56:30,163 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 09:56:30,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:56:30,207 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-12-09 09:56:30,208 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 09:56:30,209 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 09:56:30,209 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-12-09 09:56:30,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-09 09:56:30,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-09 09:56:30,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-12-09 09:56:30,210 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 8 states. [2018-12-09 09:56:30,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:56:30,317 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2018-12-09 09:56:30,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-09 09:56:30,317 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2018-12-09 09:56:30,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:56:30,318 INFO L225 Difference]: With dead ends: 68 [2018-12-09 09:56:30,318 INFO L226 Difference]: Without dead ends: 54 [2018-12-09 09:56:30,318 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2018-12-09 09:56:30,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-12-09 09:56:30,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2018-12-09 09:56:30,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-12-09 09:56:30,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2018-12-09 09:56:30,324 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 40 [2018-12-09 09:56:30,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:56:30,324 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2018-12-09 09:56:30,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-09 09:56:30,324 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2018-12-09 09:56:30,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-12-09 09:56:30,325 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:56:30,325 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:56:30,326 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 09:56:30,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:56:30,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1489958921, now seen corresponding path program 1 times [2018-12-09 09:56:30,326 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 09:56:30,327 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 09:56:30,340 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 09:56:30,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:56:30,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:56:30,414 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-09 09:56:30,414 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 09:56:30,476 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-09 09:56:30,478 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:56:30,478 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 09:56:30,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:56:30,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:56:30,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:56:30,599 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-12-09 09:56:30,600 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 09:56:30,732 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-12-09 09:56:30,746 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2018-12-09 09:56:30,747 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 8] total 22 [2018-12-09 09:56:30,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-12-09 09:56:30,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-12-09 09:56:30,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2018-12-09 09:56:30,748 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 22 states. [2018-12-09 09:56:33,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:56:33,108 INFO L93 Difference]: Finished difference Result 167 states and 218 transitions. [2018-12-09 09:56:33,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-12-09 09:56:33,108 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-12-09 09:56:33,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:56:33,109 INFO L225 Difference]: With dead ends: 167 [2018-12-09 09:56:33,109 INFO L226 Difference]: Without dead ends: 123 [2018-12-09 09:56:33,110 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=568, Invalid=3854, Unknown=0, NotChecked=0, Total=4422 [2018-12-09 09:56:33,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-12-09 09:56:33,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 60. [2018-12-09 09:56:33,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-12-09 09:56:33,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2018-12-09 09:56:33,117 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 42 [2018-12-09 09:56:33,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:56:33,118 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2018-12-09 09:56:33,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-12-09 09:56:33,118 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2018-12-09 09:56:33,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-12-09 09:56:33,119 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:56:33,119 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:56:33,119 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 09:56:33,119 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:56:33,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1835345178, now seen corresponding path program 1 times [2018-12-09 09:56:33,120 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 09:56:33,120 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 09:56:33,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:56:33,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:56:33,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:56:33,196 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-12-09 09:56:33,196 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 09:56:33,197 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 09:56:33,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-12-09 09:56:33,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 09:56:33,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 09:56:33,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-09 09:56:33,198 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand 4 states. [2018-12-09 09:56:33,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:56:33,231 INFO L93 Difference]: Finished difference Result 79 states and 94 transitions. [2018-12-09 09:56:33,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 09:56:33,232 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2018-12-09 09:56:33,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:56:33,232 INFO L225 Difference]: With dead ends: 79 [2018-12-09 09:56:33,232 INFO L226 Difference]: Without dead ends: 57 [2018-12-09 09:56:33,233 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-09 09:56:33,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-09 09:56:33,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-12-09 09:56:33,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-12-09 09:56:33,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2018-12-09 09:56:33,237 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 48 [2018-12-09 09:56:33,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:56:33,237 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2018-12-09 09:56:33,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 09:56:33,237 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2018-12-09 09:56:33,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-12-09 09:56:33,237 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:56:33,237 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:56:33,238 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 09:56:33,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:56:33,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1547819580, now seen corresponding path program 1 times [2018-12-09 09:56:33,238 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 09:56:33,238 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 09:56:33,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:56:33,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:56:33,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:56:33,336 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-12-09 09:56:33,336 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 09:56:33,363 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-12-09 09:56:33,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:56:33,364 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 09:56:33,370 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:56:33,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:56:33,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:56:33,418 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-12-09 09:56:33,418 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 09:56:33,433 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-09 09:56:33,433 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 10 [2018-12-09 09:56:33,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-09 09:56:33,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-09 09:56:33,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-12-09 09:56:33,434 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand 10 states. [2018-12-09 09:56:33,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:56:33,570 INFO L93 Difference]: Finished difference Result 128 states and 162 transitions. [2018-12-09 09:56:33,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-09 09:56:33,571 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2018-12-09 09:56:33,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 09:56:33,571 INFO L225 Difference]: With dead ends: 128 [2018-12-09 09:56:33,571 INFO L226 Difference]: Without dead ends: 114 [2018-12-09 09:56:33,572 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2018-12-09 09:56:33,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-12-09 09:56:33,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 57. [2018-12-09 09:56:33,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-12-09 09:56:33,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2018-12-09 09:56:33,577 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 48 [2018-12-09 09:56:33,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 09:56:33,577 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2018-12-09 09:56:33,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-09 09:56:33,578 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2018-12-09 09:56:33,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-12-09 09:56:33,578 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 09:56:33,578 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 09:56:33,578 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 09:56:33,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:56:33,579 INFO L82 PathProgramCache]: Analyzing trace with hash -915073569, now seen corresponding path program 1 times [2018-12-09 09:56:33,579 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 09:56:33,579 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-09 09:56:33,592 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:56:33,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 09:56:34,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 09:56:34,201 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-09 09:56:34,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 09:56:34 BoogieIcfgContainer [2018-12-09 09:56:34,227 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 09:56:34,227 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 09:56:34,227 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 09:56:34,228 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 09:56:34,228 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:56:29" (3/4) ... [2018-12-09 09:56:34,229 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-09 09:56:34,275 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_c58dab72-5837-4625-afd7-3f5984de86c4/bin-2019/utaipan/witness.graphml [2018-12-09 09:56:34,275 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 09:56:34,276 INFO L168 Benchmark]: Toolchain (without parser) took 5154.85 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 199.2 MB). Free memory was 942.0 MB in the beginning and 925.9 MB in the end (delta: 16.2 MB). Peak memory consumption was 215.4 MB. Max. memory is 11.5 GB. [2018-12-09 09:56:34,277 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 09:56:34,277 INFO L168 Benchmark]: CACSL2BoogieTranslator took 143.32 ms. Allocated memory is still 1.0 GB. Free memory was 942.0 MB in the beginning and 931.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-09 09:56:34,277 INFO L168 Benchmark]: Boogie Procedure Inliner took 15.34 ms. Allocated memory is still 1.0 GB. Free memory was 931.3 MB in the beginning and 925.9 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-12-09 09:56:34,278 INFO L168 Benchmark]: Boogie Preprocessor took 19.38 ms. Allocated memory is still 1.0 GB. Free memory is still 925.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 09:56:34,278 INFO L168 Benchmark]: RCFGBuilder took 212.13 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.4 MB). Free memory was 925.9 MB in the beginning and 1.1 GB in the end (delta: -170.6 MB). Peak memory consumption was 14.0 MB. Max. memory is 11.5 GB. [2018-12-09 09:56:34,278 INFO L168 Benchmark]: TraceAbstraction took 4713.87 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 71.8 MB). Free memory was 1.1 GB in the beginning and 925.9 MB in the end (delta: 170.6 MB). Peak memory consumption was 242.5 MB. Max. memory is 11.5 GB. [2018-12-09 09:56:34,278 INFO L168 Benchmark]: Witness Printer took 48.04 ms. Allocated memory is still 1.2 GB. Free memory is still 925.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 09:56:34,280 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 143.32 ms. Allocated memory is still 1.0 GB. Free memory was 942.0 MB in the beginning and 931.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 15.34 ms. Allocated memory is still 1.0 GB. Free memory was 931.3 MB in the beginning and 925.9 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.38 ms. Allocated memory is still 1.0 GB. Free memory is still 925.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 212.13 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.4 MB). Free memory was 925.9 MB in the beginning and 1.1 GB in the end (delta: -170.6 MB). Peak memory consumption was 14.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4713.87 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 71.8 MB). Free memory was 1.1 GB in the beginning and 925.9 MB in the end (delta: 170.6 MB). Peak memory consumption was 242.5 MB. Max. memory is 11.5 GB. * Witness Printer took 48.04 ms. Allocated memory is still 1.2 GB. Free memory is still 925.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] char string_A[5], string_B[5]; [L18] int i, j, nc_A, nc_B, found=0; [L21] i=0 VAL [found=0, i=0, string_A={3:0}, string_B={2:0}] [L21] COND TRUE i<5 [L22] string_A[i]=__VERIFIER_nondet_char() [L21] i++ VAL [found=0, i=1, string_A={3:0}, string_B={2:0}] [L21] COND TRUE i<5 [L22] string_A[i]=__VERIFIER_nondet_char() [L21] i++ VAL [found=0, i=2, string_A={3:0}, string_B={2:0}] [L21] COND TRUE i<5 [L22] string_A[i]=__VERIFIER_nondet_char() [L21] i++ VAL [found=0, i=3, string_A={3:0}, string_B={2:0}] [L21] COND TRUE i<5 [L22] string_A[i]=__VERIFIER_nondet_char() [L21] i++ VAL [found=0, i=4, string_A={3:0}, string_B={2:0}] [L21] COND TRUE i<5 [L22] string_A[i]=__VERIFIER_nondet_char() [L21] i++ VAL [found=0, i=5, string_A={3:0}, string_B={2:0}] [L21] COND FALSE !(i<5) VAL [found=0, i=5, string_A={3:0}, string_B={2:0}] [L23] EXPR string_A[5 -1] VAL [found=0, i=5, string_A={3:0}, string_A[5 -1]=0, string_B={2:0}] [L23] COND FALSE !(!(string_A[5 -1]=='\0')) [L25] i=0 VAL [found=0, i=0, string_A={3:0}, string_B={2:0}] [L25] COND TRUE i<5 [L26] string_B[i]=__VERIFIER_nondet_char() [L25] i++ VAL [found=0, i=1, string_A={3:0}, string_B={2:0}] [L25] COND TRUE i<5 [L26] string_B[i]=__VERIFIER_nondet_char() [L25] i++ VAL [found=0, i=2, string_A={3:0}, string_B={2:0}] [L25] COND TRUE i<5 [L26] string_B[i]=__VERIFIER_nondet_char() [L25] i++ VAL [found=0, i=3, string_A={3:0}, string_B={2:0}] [L25] COND TRUE i<5 [L26] string_B[i]=__VERIFIER_nondet_char() [L25] i++ VAL [found=0, i=4, string_A={3:0}, string_B={2:0}] [L25] COND TRUE i<5 [L26] string_B[i]=__VERIFIER_nondet_char() [L25] i++ VAL [found=0, i=5, string_A={3:0}, string_B={2:0}] [L25] COND FALSE !(i<5) VAL [found=0, i=5, string_A={3:0}, string_B={2:0}] [L27] EXPR string_B[5 -1] VAL [found=0, i=5, string_A={3:0}, string_B={2:0}, string_B[5 -1]=0] [L27] COND FALSE !(!(string_B[5 -1]=='\0')) [L29] nc_A = 0 VAL [found=0, i=5, nc_A=0, string_A={3:0}, string_B={2:0}] [L30] EXPR string_A[nc_A] VAL [found=0, i=5, nc_A=0, string_A={3:0}, string_A[nc_A]=1, string_B={2:0}] [L30] COND TRUE string_A[nc_A]!='\0' [L31] nc_A++ VAL [found=0, i=5, nc_A=1, string_A={3:0}, string_B={2:0}] [L30] EXPR string_A[nc_A] VAL [found=0, i=5, nc_A=1, string_A={3:0}, string_A[nc_A]=0, string_B={2:0}] [L30] COND FALSE !(string_A[nc_A]!='\0') [L33] nc_B = 0 VAL [found=0, i=5, nc_A=1, nc_B=0, string_A={3:0}, string_B={2:0}] [L34] EXPR string_B[nc_B] VAL [found=0, i=5, nc_A=1, nc_B=0, string_A={3:0}, string_B={2:0}, string_B[nc_B]=1] [L34] COND TRUE string_B[nc_B]!='\0' [L35] nc_B++ VAL [found=0, i=5, nc_A=1, nc_B=1, string_A={3:0}, string_B={2:0}] [L34] EXPR string_B[nc_B] VAL [found=0, i=5, nc_A=1, nc_B=1, string_A={3:0}, string_B={2:0}, string_B[nc_B]=0] [L34] COND FALSE !(string_B[nc_B]!='\0') [L37] COND FALSE !(!(nc_B >= nc_A)) [L40] EXPR j=0 [L40] i=j=0 VAL [found=0, i=0, j=0, nc_A=1, nc_B=1, string_A={3:0}, string_B={2:0}] [L41] COND TRUE (inc_B-1)<