./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_true-unreach-call.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_372dd51d-d8b1-49b9-a031-0a0f0595ce7b/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_372dd51d-d8b1-49b9-a031-0a0f0595ce7b/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_372dd51d-d8b1-49b9-a031-0a0f0595ce7b/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_372dd51d-d8b1-49b9-a031-0a0f0595ce7b/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_true-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_372dd51d-d8b1-49b9-a031-0a0f0595ce7b/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_372dd51d-d8b1-49b9-a031-0a0f0595ce7b/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 8571d6e044ba86c3b82c24f6ff451bf497f2aedf ......................................................................................................................................................................................................................................................................................... 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_372dd51d-d8b1-49b9-a031-0a0f0595ce7b/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_372dd51d-d8b1-49b9-a031-0a0f0595ce7b/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_372dd51d-d8b1-49b9-a031-0a0f0595ce7b/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_372dd51d-d8b1-49b9-a031-0a0f0595ce7b/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_true-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_372dd51d-d8b1-49b9-a031-0a0f0595ce7b/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_372dd51d-d8b1-49b9-a031-0a0f0595ce7b/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 8571d6e044ba86c3b82c24f6ff451bf497f2aedf .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-10 05:38:35,792 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 05:38:35,793 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 05:38:35,800 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 05:38:35,800 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 05:38:35,801 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 05:38:35,802 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 05:38:35,803 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 05:38:35,804 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 05:38:35,804 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 05:38:35,805 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 05:38:35,805 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 05:38:35,806 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 05:38:35,806 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 05:38:35,807 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 05:38:35,808 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 05:38:35,808 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 05:38:35,809 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 05:38:35,811 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 05:38:35,812 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 05:38:35,813 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 05:38:35,813 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 05:38:35,815 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 05:38:35,815 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 05:38:35,816 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 05:38:35,816 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 05:38:35,817 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 05:38:35,817 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 05:38:35,818 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 05:38:35,819 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 05:38:35,819 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 05:38:35,819 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 05:38:35,820 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 05:38:35,820 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 05:38:35,820 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 05:38:35,821 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 05:38:35,821 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_372dd51d-d8b1-49b9-a031-0a0f0595ce7b/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-10 05:38:35,831 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 05:38:35,831 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 05:38:35,832 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 05:38:35,832 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-10 05:38:35,832 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-10 05:38:35,832 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-10 05:38:35,832 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-10 05:38:35,833 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-10 05:38:35,833 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-10 05:38:35,833 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-10 05:38:35,833 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-10 05:38:35,833 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 05:38:35,833 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 05:38:35,834 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 05:38:35,834 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 05:38:35,834 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 05:38:35,834 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 05:38:35,834 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 05:38:35,834 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 05:38:35,834 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 05:38:35,835 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 05:38:35,835 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 05:38:35,835 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 05:38:35,835 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 05:38:35,835 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 05:38:35,835 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 05:38:35,835 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 05:38:35,835 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 05:38:35,836 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 05:38:35,836 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 05:38:35,836 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-10 05:38:35,836 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 05:38:35,836 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 05:38:35,836 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-10 05:38:35,836 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_372dd51d-d8b1-49b9-a031-0a0f0595ce7b/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 -> 8571d6e044ba86c3b82c24f6ff451bf497f2aedf [2018-11-10 05:38:35,858 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 05:38:35,867 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 05:38:35,868 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 05:38:35,869 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 05:38:35,870 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 05:38:35,870 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_372dd51d-d8b1-49b9-a031-0a0f0595ce7b/bin-2019/utaipan/../../sv-benchmarks/c/floats-esbmc-regression/Double_div_true-unreach-call.i [2018-11-10 05:38:35,906 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_372dd51d-d8b1-49b9-a031-0a0f0595ce7b/bin-2019/utaipan/data/b9873bf22/30d62a23b9464c19819d272eb207545b/FLAGaeee497b5 [2018-11-10 05:38:36,205 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 05:38:36,205 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_372dd51d-d8b1-49b9-a031-0a0f0595ce7b/sv-benchmarks/c/floats-esbmc-regression/Double_div_true-unreach-call.i [2018-11-10 05:38:36,210 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_372dd51d-d8b1-49b9-a031-0a0f0595ce7b/bin-2019/utaipan/data/b9873bf22/30d62a23b9464c19819d272eb207545b/FLAGaeee497b5 [2018-11-10 05:38:36,219 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_372dd51d-d8b1-49b9-a031-0a0f0595ce7b/bin-2019/utaipan/data/b9873bf22/30d62a23b9464c19819d272eb207545b [2018-11-10 05:38:36,221 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 05:38:36,223 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-10 05:38:36,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 05:38:36,224 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 05:38:36,227 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 05:38:36,228 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 05:38:36" (1/1) ... [2018-11-10 05:38:36,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bb581ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:38:36, skipping insertion in model container [2018-11-10 05:38:36,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 05:38:36" (1/1) ... [2018-11-10 05:38:36,239 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 05:38:36,255 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 05:38:36,355 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 05:38:36,359 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 05:38:36,371 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 05:38:36,382 INFO L193 MainTranslator]: Completed translation [2018-11-10 05:38:36,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:38:36 WrapperNode [2018-11-10 05:38:36,382 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 05:38:36,383 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-10 05:38:36,383 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-10 05:38:36,383 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-10 05:38:36,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:38:36" (1/1) ... [2018-11-10 05:38:36,391 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:38:36" (1/1) ... [2018-11-10 05:38:36,396 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-10 05:38:36,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 05:38:36,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 05:38:36,397 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 05:38:36,402 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:38:36" (1/1) ... [2018-11-10 05:38:36,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:38:36" (1/1) ... [2018-11-10 05:38:36,403 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:38:36" (1/1) ... [2018-11-10 05:38:36,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:38:36" (1/1) ... [2018-11-10 05:38:36,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:38:36" (1/1) ... [2018-11-10 05:38:36,408 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:38:36" (1/1) ... [2018-11-10 05:38:36,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:38:36" (1/1) ... [2018-11-10 05:38:36,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 05:38:36,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 05:38:36,410 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 05:38:36,410 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 05:38:36,410 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:38:36" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_372dd51d-d8b1-49b9-a031-0a0f0595ce7b/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 [2018-11-10 05:38:36,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 05:38:36,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 05:38:36,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 05:38:36,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 05:38:36,479 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 05:38:36,479 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 05:38:36,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-10 05:38:36,480 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-10 05:38:36,573 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 05:38:36,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 05:38:36 BoogieIcfgContainer [2018-11-10 05:38:36,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 05:38:36,574 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 05:38:36,574 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 05:38:36,576 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 05:38:36,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 05:38:36" (1/3) ... [2018-11-10 05:38:36,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@668b85a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 05:38:36, skipping insertion in model container [2018-11-10 05:38:36,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:38:36" (2/3) ... [2018-11-10 05:38:36,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@668b85a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 05:38:36, skipping insertion in model container [2018-11-10 05:38:36,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 05:38:36" (3/3) ... [2018-11-10 05:38:36,578 INFO L112 eAbstractionObserver]: Analyzing ICFG Double_div_true-unreach-call.i [2018-11-10 05:38:36,583 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 05:38:36,588 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 05:38:36,599 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 05:38:36,619 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 05:38:36,620 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 05:38:36,620 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 05:38:36,620 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 05:38:36,620 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 05:38:36,620 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 05:38:36,620 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 05:38:36,620 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 05:38:36,634 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-11-10 05:38:36,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-10 05:38:36,638 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:38:36,639 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:38:36,640 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:38:36,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:38:36,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1871509567, now seen corresponding path program 1 times [2018-11-10 05:38:36,645 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 05:38:36,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:38:36,675 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:38:36,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:38:36,675 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 05:38:36,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:38:36,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 05:38:36,707 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 05:38:36,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-10 05:38:36,708 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 05:38:36,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-10 05:38:36,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-10 05:38:36,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 05:38:36,719 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-11-10 05:38:36,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:38:36,733 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2018-11-10 05:38:36,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-10 05:38:36,734 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-11-10 05:38:36,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:38:36,739 INFO L225 Difference]: With dead ends: 31 [2018-11-10 05:38:36,739 INFO L226 Difference]: Without dead ends: 12 [2018-11-10 05:38:36,741 INFO L605 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 [2018-11-10 05:38:36,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-11-10 05:38:36,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-11-10 05:38:36,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-11-10 05:38:36,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-11-10 05:38:36,768 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-11-10 05:38:36,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:38:36,768 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-11-10 05:38:36,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-10 05:38:36,769 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-11-10 05:38:36,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-10 05:38:36,769 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:38:36,769 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:38:36,769 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:38:36,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:38:36,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1861991801, now seen corresponding path program 1 times [2018-11-10 05:38:36,770 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 05:38:36,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:38:36,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:38:36,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:38:36,771 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 05:38:36,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 05:38:36,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 05:38:36,793 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-10 05:38:36,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 05:38:36 BoogieIcfgContainer [2018-11-10 05:38:36,808 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 05:38:36,808 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 05:38:36,808 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 05:38:36,808 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 05:38:36,809 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 05:38:36" (3/4) ... [2018-11-10 05:38:36,812 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-10 05:38:36,812 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 05:38:36,813 INFO L168 Benchmark]: Toolchain (without parser) took 590.86 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.1 MB). Free memory was 960.2 MB in the beginning and 1.1 GB in the end (delta: -128.7 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 05:38:36,814 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 05:38:36,814 INFO L168 Benchmark]: CACSL2BoogieTranslator took 158.88 ms. Allocated memory is still 1.0 GB. Free memory was 960.2 MB in the beginning and 949.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-10 05:38:36,815 INFO L168 Benchmark]: Boogie Procedure Inliner took 13.91 ms. Allocated memory is still 1.0 GB. Free memory is still 949.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 05:38:36,815 INFO L168 Benchmark]: Boogie Preprocessor took 12.93 ms. Allocated memory is still 1.0 GB. Free memory was 949.5 MB in the beginning and 946.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-10 05:38:36,816 INFO L168 Benchmark]: RCFGBuilder took 163.91 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.1 MB). Free memory was 946.8 MB in the beginning and 1.1 GB in the end (delta: -163.6 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. [2018-11-10 05:38:36,816 INFO L168 Benchmark]: TraceAbstraction took 233.98 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 11.5 GB. [2018-11-10 05:38:36,817 INFO L168 Benchmark]: Witness Printer took 3.96 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 05:38:36,819 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 158.88 ms. Allocated memory is still 1.0 GB. Free memory was 960.2 MB in the beginning and 949.5 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 13.91 ms. Allocated memory is still 1.0 GB. Free memory is still 949.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.93 ms. Allocated memory is still 1.0 GB. Free memory was 949.5 MB in the beginning and 946.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 163.91 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.1 MB). Free memory was 946.8 MB in the beginning and 1.1 GB in the end (delta: -163.6 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 233.98 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 11.5 GB. * Witness Printer took 3.96 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 2]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 12, overapproximation of someBinaryArithmeticDOUBLEoperation at line 10. Possible FailurePath: [L9] double x = 1.0; [L10] double x1 = x/2.5; VAL [x=1] [L12] COND FALSE !(x1 != x) VAL [x=1] [L18] CALL __VERIFIER_assert(x == 0) VAL [\old(cond)=0] [L2] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L2] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. UNSAFE Result, 0.1s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 19 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 81 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-1dbac8b [2018-11-10 05:38:38,259 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 05:38:38,261 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 05:38:38,269 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 05:38:38,269 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 05:38:38,270 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 05:38:38,271 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 05:38:38,272 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 05:38:38,273 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 05:38:38,273 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 05:38:38,274 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 05:38:38,274 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 05:38:38,275 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 05:38:38,276 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 05:38:38,277 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 05:38:38,277 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 05:38:38,278 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 05:38:38,279 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 05:38:38,280 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 05:38:38,281 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 05:38:38,282 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 05:38:38,283 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 05:38:38,284 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 05:38:38,284 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 05:38:38,284 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 05:38:38,285 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 05:38:38,286 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 05:38:38,286 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 05:38:38,287 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 05:38:38,288 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 05:38:38,288 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 05:38:38,288 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 05:38:38,288 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 05:38:38,289 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 05:38:38,289 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 05:38:38,290 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 05:38:38,290 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_372dd51d-d8b1-49b9-a031-0a0f0595ce7b/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2018-11-10 05:38:38,302 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 05:38:38,302 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 05:38:38,303 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 05:38:38,303 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-10 05:38:38,303 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-10 05:38:38,303 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-10 05:38:38,304 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-10 05:38:38,304 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-10 05:38:38,304 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 05:38:38,304 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 05:38:38,304 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 05:38:38,305 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 05:38:38,305 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 05:38:38,305 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 05:38:38,305 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 05:38:38,305 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-11-10 05:38:38,305 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-11-10 05:38:38,305 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 05:38:38,305 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 05:38:38,306 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 05:38:38,306 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 05:38:38,306 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 05:38:38,306 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 05:38:38,306 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 05:38:38,306 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 05:38:38,306 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 05:38:38,307 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 05:38:38,307 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 05:38:38,307 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-11-10 05:38:38,307 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 05:38:38,307 INFO L133 SettingsManager]: * Command for external solver=cvc4nyu --tear-down-incremental --rewrite-divk --print-success --lang smt [2018-11-10 05:38:38,307 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-11-10 05:38:38,307 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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_372dd51d-d8b1-49b9-a031-0a0f0595ce7b/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 -> 8571d6e044ba86c3b82c24f6ff451bf497f2aedf [2018-11-10 05:38:38,338 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 05:38:38,347 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 05:38:38,350 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 05:38:38,351 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 05:38:38,351 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 05:38:38,352 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_372dd51d-d8b1-49b9-a031-0a0f0595ce7b/bin-2019/utaipan/../../sv-benchmarks/c/floats-esbmc-regression/Double_div_true-unreach-call.i [2018-11-10 05:38:38,398 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_372dd51d-d8b1-49b9-a031-0a0f0595ce7b/bin-2019/utaipan/data/2cc61d41f/d6a87d69057c4a518f1e6e71951ff891/FLAG6af894bad [2018-11-10 05:38:38,722 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 05:38:38,722 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_372dd51d-d8b1-49b9-a031-0a0f0595ce7b/sv-benchmarks/c/floats-esbmc-regression/Double_div_true-unreach-call.i [2018-11-10 05:38:38,726 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_372dd51d-d8b1-49b9-a031-0a0f0595ce7b/bin-2019/utaipan/data/2cc61d41f/d6a87d69057c4a518f1e6e71951ff891/FLAG6af894bad [2018-11-10 05:38:38,734 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_372dd51d-d8b1-49b9-a031-0a0f0595ce7b/bin-2019/utaipan/data/2cc61d41f/d6a87d69057c4a518f1e6e71951ff891 [2018-11-10 05:38:38,736 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 05:38:38,737 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-10 05:38:38,737 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 05:38:38,737 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 05:38:38,740 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 05:38:38,741 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 05:38:38" (1/1) ... [2018-11-10 05:38:38,743 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61b1e68f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:38:38, skipping insertion in model container [2018-11-10 05:38:38,743 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 05:38:38" (1/1) ... [2018-11-10 05:38:38,749 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 05:38:38,762 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 05:38:38,879 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 05:38:38,884 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 05:38:38,896 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 05:38:38,907 INFO L193 MainTranslator]: Completed translation [2018-11-10 05:38:38,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:38:38 WrapperNode [2018-11-10 05:38:38,908 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 05:38:38,908 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-10 05:38:38,908 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-10 05:38:38,908 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-10 05:38:38,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:38:38" (1/1) ... [2018-11-10 05:38:38,921 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:38:38" (1/1) ... [2018-11-10 05:38:38,924 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-10 05:38:38,925 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 05:38:38,925 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 05:38:38,925 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 05:38:38,930 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:38:38" (1/1) ... [2018-11-10 05:38:38,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:38:38" (1/1) ... [2018-11-10 05:38:38,931 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:38:38" (1/1) ... [2018-11-10 05:38:38,931 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:38:38" (1/1) ... [2018-11-10 05:38:38,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:38:38" (1/1) ... [2018-11-10 05:38:38,938 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:38:38" (1/1) ... [2018-11-10 05:38:38,939 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:38:38" (1/1) ... [2018-11-10 05:38:38,941 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 05:38:38,941 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 05:38:38,941 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 05:38:38,941 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 05:38:38,942 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:38:38" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_372dd51d-d8b1-49b9-a031-0a0f0595ce7b/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 [2018-11-10 05:38:38,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 05:38:38,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 05:38:38,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 05:38:38,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 05:38:38,984 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 05:38:38,984 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 05:38:38,984 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-10 05:38:38,984 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-10 05:38:39,773 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 05:38:39,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 05:38:39 BoogieIcfgContainer [2018-11-10 05:38:39,773 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 05:38:39,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 05:38:39,774 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 05:38:39,776 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 05:38:39,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 05:38:38" (1/3) ... [2018-11-10 05:38:39,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27dc9525 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 05:38:39, skipping insertion in model container [2018-11-10 05:38:39,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:38:38" (2/3) ... [2018-11-10 05:38:39,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27dc9525 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 05:38:39, skipping insertion in model container [2018-11-10 05:38:39,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 05:38:39" (3/3) ... [2018-11-10 05:38:39,778 INFO L112 eAbstractionObserver]: Analyzing ICFG Double_div_true-unreach-call.i [2018-11-10 05:38:39,784 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 05:38:39,788 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 05:38:39,797 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 05:38:39,816 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 05:38:39,817 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 05:38:39,817 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 05:38:39,817 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 05:38:39,817 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 05:38:39,817 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 05:38:39,817 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 05:38:39,817 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 05:38:39,817 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 05:38:39,831 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-11-10 05:38:39,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-10 05:38:39,836 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:38:39,836 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:38:39,837 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:38:39,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:38:39,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1871509567, now seen corresponding path program 1 times [2018-11-10 05:38:39,843 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 05:38:39,843 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_372dd51d-d8b1-49b9-a031-0a0f0595ce7b/bin-2019/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2018-11-10 05:38:39,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:38:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:38:40,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:38:40,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 05:38:40,032 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 05:38:40,042 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 05:38:40,042 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-10 05:38:40,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-10 05:38:40,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-10 05:38:40,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 05:38:40,054 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-11-10 05:38:40,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:38:40,068 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2018-11-10 05:38:40,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-10 05:38:40,069 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-11-10 05:38:40,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:38:40,074 INFO L225 Difference]: With dead ends: 31 [2018-11-10 05:38:40,074 INFO L226 Difference]: Without dead ends: 12 [2018-11-10 05:38:40,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 05:38:40,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-11-10 05:38:40,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-11-10 05:38:40,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-11-10 05:38:40,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-11-10 05:38:40,103 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-11-10 05:38:40,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:38:40,103 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-11-10 05:38:40,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-10 05:38:40,103 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-11-10 05:38:40,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-10 05:38:40,104 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:38:40,104 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:38:40,104 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:38:40,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:38:40,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1861991801, now seen corresponding path program 1 times [2018-11-10 05:38:40,105 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 05:38:40,105 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_372dd51d-d8b1-49b9-a031-0a0f0595ce7b/bin-2019/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2018-11-10 05:38:40,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:38:40,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:38:40,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:38:42,850 WARN L179 SmtUtils]: Spent 2.57 s on a formula simplification that was a NOOP. DAG size: 11 [2018-11-10 05:38:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 05:38:42,857 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 05:38:42,866 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 05:38:42,866 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-10 05:38:42,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-10 05:38:42,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-10 05:38:42,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 05:38:42,867 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 3 states. [2018-11-10 05:38:44,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:38:44,434 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-11-10 05:38:45,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-10 05:38:45,035 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-11-10 05:38:45,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:38:45,035 INFO L225 Difference]: With dead ends: 19 [2018-11-10 05:38:45,036 INFO L226 Difference]: Without dead ends: 14 [2018-11-10 05:38:45,036 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 05:38:45,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-11-10 05:38:45,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-11-10 05:38:45,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-11-10 05:38:45,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-11-10 05:38:45,039 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-11-10 05:38:45,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:38:45,039 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-11-10 05:38:45,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-10 05:38:45,039 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-11-10 05:38:45,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-10 05:38:45,040 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:38:45,040 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:38:45,040 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:38:45,040 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:38:45,040 INFO L82 PathProgramCache]: Analyzing trace with hash -661808769, now seen corresponding path program 1 times [2018-11-10 05:38:45,041 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 05:38:45,041 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_372dd51d-d8b1-49b9-a031-0a0f0595ce7b/bin-2019/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2018-11-10 05:38:45,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:38:45,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:38:45,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:38:51,407 WARN L179 SmtUtils]: Spent 4.71 s on a formula simplification that was a NOOP. DAG size: 12 [2018-11-10 05:38:51,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 05:38:51,411 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:39:03,068 WARN L179 SmtUtils]: Spent 2.30 s on a formula simplification that was a NOOP. DAG size: 7 [2018-11-10 05:39:03,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 05:39:03,087 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:39:03,087 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_372dd51d-d8b1-49b9-a031-0a0f0595ce7b/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 [2018-11-10 05:39:03,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:39:06,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:39:07,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:39:07,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 05:39:07,137 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:39:47,851 WARN L179 SmtUtils]: Spent 8.57 s on a formula simplification that was a NOOP. DAG size: 11 [2018-11-10 05:39:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 05:39:47,925 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-10 05:39:47,925 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 7] total 11 [2018-11-10 05:39:47,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 05:39:47,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 05:39:47,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=73, Unknown=9, NotChecked=0, Total=110 [2018-11-10 05:39:47,926 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 11 states. [2018-11-10 05:40:00,590 WARN L854 $PredicateComparison]: unable to prove that (and (or (not (fp.eq (fp.div RNE c_main_~x1~0 ((_ to_fp 11 53) RNE (/ 5.0 2.0))) c_main_~x1~0)) (fp.eq c_main_~x1~0 ((_ to_fp 11 53) RNE (_ bv0 32)))) (not (fp.eq c_main_~x1~0 c_main_~x~0))) is different from true [2018-11-10 05:40:05,888 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) RNE (_ bv0 32)))) (and (fp.eq c_main_~x~0 .cse0) (or (not (fp.eq (fp.div RNE c_main_~x1~0 ((_ to_fp 11 53) RNE (/ 5.0 2.0))) c_main_~x1~0)) (fp.eq c_main_~x1~0 .cse0)))) is different from false [2018-11-10 05:40:08,077 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) RNE (_ bv0 32)))) (and (fp.eq c_main_~x~0 .cse0) (or (not (fp.eq (fp.div RNE c_main_~x1~0 ((_ to_fp 11 53) RNE (/ 5.0 2.0))) c_main_~x1~0)) (fp.eq c_main_~x1~0 .cse0)))) is different from true [2018-11-10 05:40:29,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:40:29,278 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2018-11-10 05:40:29,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 05:40:29,279 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2018-11-10 05:40:29,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:40:29,279 INFO L225 Difference]: With dead ends: 28 [2018-11-10 05:40:29,280 INFO L226 Difference]: Without dead ends: 20 [2018-11-10 05:40:29,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 69.9s TimeCoverageRelationStatistics Valid=43, Invalid=108, Unknown=13, NotChecked=46, Total=210 [2018-11-10 05:40:29,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-11-10 05:40:29,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-11-10 05:40:29,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-10 05:40:29,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-11-10 05:40:29,284 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 13 [2018-11-10 05:40:29,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:40:29,285 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-11-10 05:40:29,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 05:40:29,285 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-11-10 05:40:29,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-10 05:40:29,285 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:40:29,286 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:40:29,286 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:40:29,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:40:29,286 INFO L82 PathProgramCache]: Analyzing trace with hash -875350895, now seen corresponding path program 2 times [2018-11-10 05:40:29,286 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 05:40:29,286 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_372dd51d-d8b1-49b9-a031-0a0f0595ce7b/bin-2019/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2018-11-10 05:40:29,290 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-11-10 05:40:29,941 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 05:40:29,941 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:40:29,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:40:35,789 WARN L179 SmtUtils]: Spent 3.78 s on a formula simplification that was a NOOP. DAG size: 15 [2018-11-10 05:40:35,792 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 05:40:35,792 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:41:12,176 WARN L179 SmtUtils]: Spent 9.63 s on a formula simplification that was a NOOP. DAG size: 11 [2018-11-10 05:41:16,701 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE c_main_~x1~0 .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32))) (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0))))) is different from true [2018-11-10 05:41:19,251 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1))) (or (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32)))))) is different from false [2018-11-10 05:41:21,806 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1))) (or (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32)))))) is different from true [2018-11-10 05:41:24,506 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32))) (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0))))) is different from false [2018-11-10 05:41:27,203 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32))) (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0))))) is different from true [2018-11-10 05:41:27,217 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 18 not checked. [2018-11-10 05:41:27,236 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:41:27,236 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_372dd51d-d8b1-49b9-a031-0a0f0595ce7b/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:41:27,241 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 05:41:40,685 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 05:41:40,685 INFO L250 tOrderPrioritization]: Conjunction of SSA is unknown [2018-11-10 05:41:42,868 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:41:42,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2018-11-10 05:41:42,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-10 05:41:42,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-10 05:41:42,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=99, Unknown=11, NotChecked=66, Total=210 [2018-11-10 05:41:42,869 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 15 states. [2018-11-10 05:41:45,637 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (_ bv0 32))) (.cse0 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (and (= c_main_~x1~0 (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse0)) (or (fp.eq c_main_~x~0 .cse1) (not (fp.eq c_main_~x1~0 c_main_~x~0))) (let ((.cse2 (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse0) .cse0) .cse0))) (or (fp.eq .cse2 .cse1) (not (fp.eq (fp.div RNE .cse2 .cse0) .cse2)))))) is different from true [2018-11-10 05:41:48,218 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) RNE (_ bv0 32))) (.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (and (or (fp.eq c_main_~x~0 .cse0) (not (fp.eq c_main_~x1~0 c_main_~x~0))) (= c_main_~x1~0 (fp.div RNE (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse1) .cse1)) (let ((.cse2 (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1))) (or (not (fp.eq (fp.div RNE .cse2 .cse1) .cse2)) (fp.eq .cse2 .cse0))))) is different from true [2018-11-10 05:41:50,601 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (and (let ((.cse0 (fp.div RNE c_main_~x1~0 .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32))) (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) (= c_main_~x1~0 (fp.div RNE (fp.div RNE (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse1) .cse1) .cse1)))) is different from true [2018-11-10 05:41:59,979 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) RNE (_ bv0 32)))) (and (fp.eq c_main_~x~0 .cse0) (or (not (fp.eq (fp.div RNE c_main_~x1~0 ((_ to_fp 11 53) RNE (/ 5.0 2.0))) c_main_~x1~0)) (fp.eq c_main_~x1~0 .cse0)))) is different from false [2018-11-10 05:42:02,174 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) RNE (_ bv0 32)))) (and (fp.eq c_main_~x~0 .cse0) (or (not (fp.eq (fp.div RNE c_main_~x1~0 ((_ to_fp 11 53) RNE (/ 5.0 2.0))) c_main_~x1~0)) (fp.eq c_main_~x1~0 .cse0)))) is different from true [2018-11-10 05:42:09,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:42:09,799 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2018-11-10 05:42:09,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 05:42:09,799 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2018-11-10 05:42:09,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:42:09,800 INFO L225 Difference]: With dead ends: 32 [2018-11-10 05:42:09,800 INFO L226 Difference]: Without dead ends: 24 [2018-11-10 05:42:09,800 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 71.7s TimeCoverageRelationStatistics Valid=46, Invalid=121, Unknown=17, NotChecked=196, Total=380 [2018-11-10 05:42:09,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-10 05:42:09,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-10 05:42:09,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-10 05:42:09,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-11-10 05:42:09,805 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 19 [2018-11-10 05:42:09,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:42:09,805 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-11-10 05:42:09,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-10 05:42:09,805 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-11-10 05:42:09,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-10 05:42:09,806 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:42:09,806 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:42:09,806 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:42:09,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:42:09,807 INFO L82 PathProgramCache]: Analyzing trace with hash -860965091, now seen corresponding path program 3 times [2018-11-10 05:42:09,807 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 05:42:09,807 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_372dd51d-d8b1-49b9-a031-0a0f0595ce7b/bin-2019/utaipan/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2018-11-10 05:42:09,817 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-11-10 05:42:10,428 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-10 05:42:10,428 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:42:10,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:42:14,868 WARN L179 SmtUtils]: Spent 2.79 s on a formula simplification that was a NOOP. DAG size: 7 [2018-11-10 05:42:17,258 WARN L832 $PredicateComparison]: unable to prove that (and (exists ((v_main_~x~0_16 (_ FloatingPoint 11 53))) (and (not (fp.eq c_main_~x~0 v_main_~x~0_16)) (= (fp.div RNE v_main_~x~0_16 ((_ to_fp 11 53) RNE (/ 5.0 2.0))) c_main_~x~0))) (= c_main_~x1~0 (fp.div RNE c_main_~x~0 ((_ to_fp 11 53) RNE (/ 5.0 2.0))))) is different from false [2018-11-10 05:42:19,455 WARN L854 $PredicateComparison]: unable to prove that (and (exists ((v_main_~x~0_16 (_ FloatingPoint 11 53))) (and (not (fp.eq c_main_~x~0 v_main_~x~0_16)) (= (fp.div RNE v_main_~x~0_16 ((_ to_fp 11 53) RNE (/ 5.0 2.0))) c_main_~x~0))) (= c_main_~x1~0 (fp.div RNE c_main_~x~0 ((_ to_fp 11 53) RNE (/ 5.0 2.0))))) is different from true [2018-11-10 05:42:21,837 WARN L832 $PredicateComparison]: unable to prove that (and (exists ((v_main_~x~0_16 (_ FloatingPoint 11 53))) (and (not (fp.eq c_main_~x~0 v_main_~x~0_16)) (= (fp.div RNE v_main_~x~0_16 ((_ to_fp 11 53) RNE (/ 5.0 2.0))) c_main_~x~0))) (fp.eq (fp.div RNE c_main_~x~0 ((_ to_fp 11 53) RNE (/ 5.0 2.0))) c_main_~x~0)) is different from false [2018-11-10 05:42:36,086 WARN L832 $PredicateComparison]: unable to prove that (or (and (exists ((v_prenex_2 (_ FloatingPoint 11 53))) (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE v_prenex_2 .cse1))) (and (not (fp.eq .cse0 v_prenex_2)) (fp.eq (fp.div RNE .cse0 .cse1) .cse0) (not (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32)))))))) (= |c___VERIFIER_assert_#in~cond| (_ bv0 32))) (and (= (bvadd |c___VERIFIER_assert_#in~cond| (_ bv4294967295 32)) (_ bv0 32)) (exists ((v_main_~x~0_16 (_ FloatingPoint 11 53))) (let ((.cse3 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse2 (fp.div RNE v_main_~x~0_16 .cse3))) (and (fp.eq .cse2 ((_ to_fp 11 53) RNE (_ bv0 32))) (fp.eq (fp.div RNE .cse2 .cse3) .cse2) (not (fp.eq .cse2 v_main_~x~0_16)))))))) is different from false [2018-11-10 05:42:48,416 WARN L832 $PredicateComparison]: unable to prove that (or (and (= (bvadd c___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32)) (exists ((v_main_~x~0_16 (_ FloatingPoint 11 53))) (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE v_main_~x~0_16 .cse1))) (and (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0) (not (fp.eq .cse0 v_main_~x~0_16))))))) (and (= (_ bv0 32) c___VERIFIER_assert_~cond) (exists ((v_prenex_2 (_ FloatingPoint 11 53))) (let ((.cse3 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse2 (fp.div RNE v_prenex_2 .cse3))) (and (not (fp.eq .cse2 v_prenex_2)) (fp.eq (fp.div RNE .cse2 .cse3) .cse2) (not (fp.eq .cse2 ((_ to_fp 11 53) RNE (_ bv0 32)))))))))) is different from false [2018-11-10 05:42:55,586 WARN L832 $PredicateComparison]: unable to prove that (exists ((v_prenex_2 (_ FloatingPoint 11 53))) (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE v_prenex_2 .cse1))) (and (not (fp.eq .cse0 v_prenex_2)) (fp.eq (fp.div RNE .cse0 .cse1) .cse0) (not (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32)))))))) is different from false [2018-11-10 05:42:57,950 WARN L854 $PredicateComparison]: unable to prove that (exists ((v_prenex_2 (_ FloatingPoint 11 53))) (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE v_prenex_2 .cse1))) (and (not (fp.eq .cse0 v_prenex_2)) (fp.eq (fp.div RNE .cse0 .cse1) .cse0) (not (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32)))))))) is different from true [2018-11-10 05:42:57,952 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 2 not checked. [2018-11-10 05:42:57,953 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:43:12,293 WARN L854 $PredicateComparison]: unable to prove that (or (fp.eq c_main_~x1~0 c_main_~x~0) (not (fp.eq (fp.div RNE c_main_~x1~0 ((_ to_fp 11 53) RNE (/ 5.0 2.0))) c_main_~x1~0)) (fp.eq c_main_~x1~0 ((_ to_fp 11 53) RNE (_ bv0 32)))) is different from true [2018-11-10 05:43:19,416 WARN L832 $PredicateComparison]: unable to prove that (forall ((v_main_~x~0_18 (_ FloatingPoint 11 53))) (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE v_main_~x~0_18 .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32))) (fp.eq .cse0 v_main_~x~0_18) (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))))) is different from false [2018-11-10 05:43:21,802 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_main_~x~0_18 (_ FloatingPoint 11 53))) (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE v_main_~x~0_18 .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32))) (fp.eq .cse0 v_main_~x~0_18) (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))))) is different from true [2018-11-10 05:44:19,170 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:44:19,170 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_372dd51d-d8b1-49b9-a031-0a0f0595ce7b/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:44:19,176 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 05:45:14,421 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-10 05:45:14,422 INFO L250 tOrderPrioritization]: Conjunction of SSA is unknown [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (9)] Forcibly destroying the process [2018-11-10 05:45:15,820 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-11-10 05:45:15,820 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-11-10 05:45:15,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 05:45:15,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 05:45:15,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=31, Unknown=13, NotChecked=112, Total=182 [2018-11-10 05:45:15,821 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 8 states. [2018-11-10 05:45:18,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:45:18,332 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-11-10 05:45:18,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-10 05:45:18,740 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2018-11-10 05:45:18,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:45:18,740 INFO L225 Difference]: With dead ends: 24 [2018-11-10 05:45:18,741 INFO L226 Difference]: Without dead ends: 0 [2018-11-10 05:45:18,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.7s TimeCoverageRelationStatistics Valid=26, Invalid=31, Unknown=13, NotChecked=112, Total=182 [2018-11-10 05:45:18,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-10 05:45:18,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-10 05:45:18,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-10 05:45:18,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-10 05:45:18,742 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2018-11-10 05:45:18,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:45:18,742 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-10 05:45:18,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 05:45:18,742 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-10 05:45:18,742 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-10 05:45:18,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-10 05:46:02,271 WARN L179 SmtUtils]: Spent 43.47 s on a formula simplification that was a NOOP. DAG size: 25 [2018-11-10 05:46:04,014 WARN L179 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 44 DAG size of output: 1 [2018-11-10 05:46:10,458 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:225) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:626) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:122) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:371) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:650) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:187) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SmtUtils.simplify(SmtUtils.java:150) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SmtUtils.simplifyWithStatistics(SmtUtils.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter(HoareAnnotationComposer.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.(HoareAnnotationComposer.java:105) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeCFGHoareAnnotation(BasicCegarLoop.java:982) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1427) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:630) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) ... 31 more [2018-11-10 05:46:10,460 INFO L168 Benchmark]: Toolchain (without parser) took 451723.81 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 126.9 MB). Free memory was 948.7 MB in the beginning and 925.4 MB in the end (delta: 23.3 MB). Peak memory consumption was 150.2 MB. Max. memory is 11.5 GB. [2018-11-10 05:46:10,461 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 05:46:10,461 INFO L168 Benchmark]: CACSL2BoogieTranslator took 170.54 ms. Allocated memory is still 1.0 GB. Free memory was 948.7 MB in the beginning and 937.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-10 05:46:10,461 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.13 ms. Allocated memory is still 1.0 GB. Free memory is still 937.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 05:46:10,462 INFO L168 Benchmark]: Boogie Preprocessor took 16.26 ms. Allocated memory is still 1.0 GB. Free memory was 937.9 MB in the beginning and 932.6 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-11-10 05:46:10,462 INFO L168 Benchmark]: RCFGBuilder took 832.54 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 126.9 MB). Free memory was 932.6 MB in the beginning and 1.1 GB in the end (delta: -164.9 MB). Peak memory consumption was 20.9 MB. Max. memory is 11.5 GB. [2018-11-10 05:46:10,463 INFO L168 Benchmark]: TraceAbstraction took 450685.70 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 925.4 MB in the end (delta: 172.1 MB). Peak memory consumption was 172.1 MB. Max. memory is 11.5 GB. [2018-11-10 05:46:10,465 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 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 170.54 ms. Allocated memory is still 1.0 GB. Free memory was 948.7 MB in the beginning and 937.9 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 16.13 ms. Allocated memory is still 1.0 GB. Free memory is still 937.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.26 ms. Allocated memory is still 1.0 GB. Free memory was 937.9 MB in the beginning and 932.6 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 832.54 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 126.9 MB). Free memory was 932.6 MB in the beginning and 1.1 GB in the end (delta: -164.9 MB). Peak memory consumption was 20.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 450685.70 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 925.4 MB in the end (delta: 172.1 MB). Peak memory consumption was 172.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 2]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output.: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...