./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad_false-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_a1f674e6-6655-4d02-888b-dbd3ba868e76/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_a1f674e6-6655-4d02-888b-dbd3ba868e76/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_a1f674e6-6655-4d02-888b-dbd3ba868e76/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_a1f674e6-6655-4d02-888b-dbd3ba868e76/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad_false-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_a1f674e6-6655-4d02-888b-dbd3ba868e76/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_a1f674e6-6655-4d02-888b-dbd3ba868e76/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 1d363a30f559764c47bcb73d637f2d7196a1b97b .......................................................................................................................................................................................................................................................................... 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_a1f674e6-6655-4d02-888b-dbd3ba868e76/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_a1f674e6-6655-4d02-888b-dbd3ba868e76/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_a1f674e6-6655-4d02-888b-dbd3ba868e76/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_a1f674e6-6655-4d02-888b-dbd3ba868e76/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad_false-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_a1f674e6-6655-4d02-888b-dbd3ba868e76/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_a1f674e6-6655-4d02-888b-dbd3ba868e76/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 1d363a30f559764c47bcb73d637f2d7196a1b97b ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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. stderr output: (error "out of memory") --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-10-26 21:46:35,448 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 21:46:35,449 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 21:46:35,458 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 21:46:35,459 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 21:46:35,459 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 21:46:35,460 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 21:46:35,462 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 21:46:35,463 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 21:46:35,464 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 21:46:35,465 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 21:46:35,465 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 21:46:35,466 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 21:46:35,467 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 21:46:35,468 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 21:46:35,469 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 21:46:35,469 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 21:46:35,471 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 21:46:35,473 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 21:46:35,474 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 21:46:35,475 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 21:46:35,476 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 21:46:35,478 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 21:46:35,478 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 21:46:35,478 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 21:46:35,479 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 21:46:35,480 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 21:46:35,481 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 21:46:35,481 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 21:46:35,483 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 21:46:35,483 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 21:46:35,484 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 21:46:35,484 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 21:46:35,484 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 21:46:35,485 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 21:46:35,485 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 21:46:35,486 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_a1f674e6-6655-4d02-888b-dbd3ba868e76/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-26 21:46:35,497 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 21:46:35,497 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 21:46:35,498 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 21:46:35,499 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-26 21:46:35,499 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-26 21:46:35,499 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-26 21:46:35,499 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-26 21:46:35,499 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-26 21:46:35,499 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-26 21:46:35,499 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-26 21:46:35,500 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-26 21:46:35,500 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 21:46:35,500 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-26 21:46:35,500 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 21:46:35,501 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-26 21:46:35,501 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 21:46:35,501 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 21:46:35,501 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 21:46:35,501 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 21:46:35,501 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-26 21:46:35,501 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 21:46:35,502 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 21:46:35,504 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 21:46:35,504 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 21:46:35,504 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 21:46:35,504 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 21:46:35,504 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 21:46:35,504 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 21:46:35,504 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 21:46:35,505 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 21:46:35,505 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-26 21:46:35,505 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 21:46:35,505 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 21:46:35,505 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 21:46:35,505 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_a1f674e6-6655-4d02-888b-dbd3ba868e76/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 -> 1d363a30f559764c47bcb73d637f2d7196a1b97b [2018-10-26 21:46:35,532 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 21:46:35,542 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 21:46:35,545 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 21:46:35,546 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 21:46:35,547 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 21:46:35,547 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_a1f674e6-6655-4d02-888b-dbd3ba868e76/bin-2019/utaipan/../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad_false-unreach-call.i [2018-10-26 21:46:35,590 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a1f674e6-6655-4d02-888b-dbd3ba868e76/bin-2019/utaipan/data/8325ba0f4/da52aac9adaf47439f66c3e7fa6df186/FLAG13aeb3b15 [2018-10-26 21:46:35,963 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 21:46:35,963 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_a1f674e6-6655-4d02-888b-dbd3ba868e76/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad_false-unreach-call.i [2018-10-26 21:46:35,968 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a1f674e6-6655-4d02-888b-dbd3ba868e76/bin-2019/utaipan/data/8325ba0f4/da52aac9adaf47439f66c3e7fa6df186/FLAG13aeb3b15 [2018-10-26 21:46:35,979 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_a1f674e6-6655-4d02-888b-dbd3ba868e76/bin-2019/utaipan/data/8325ba0f4/da52aac9adaf47439f66c3e7fa6df186 [2018-10-26 21:46:35,981 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 21:46:35,982 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-26 21:46:35,982 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 21:46:35,982 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 21:46:35,984 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 21:46:35,985 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:46:35" (1/1) ... [2018-10-26 21:46:35,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@267e2a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:46:35, skipping insertion in model container [2018-10-26 21:46:35,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:46:35" (1/1) ... [2018-10-26 21:46:35,996 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 21:46:36,010 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 21:46:36,127 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 21:46:36,131 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 21:46:36,143 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 21:46:36,155 INFO L193 MainTranslator]: Completed translation [2018-10-26 21:46:36,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:46:36 WrapperNode [2018-10-26 21:46:36,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 21:46:36,156 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 21:46:36,156 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 21:46:36,156 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 21:46:36,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:46:36" (1/1) ... [2018-10-26 21:46:36,169 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:46:36" (1/1) ... [2018-10-26 21:46:36,174 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 21:46:36,174 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 21:46:36,174 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 21:46:36,174 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 21:46:36,182 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:46:36" (1/1) ... [2018-10-26 21:46:36,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:46:36" (1/1) ... [2018-10-26 21:46:36,183 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:46:36" (1/1) ... [2018-10-26 21:46:36,183 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:46:36" (1/1) ... [2018-10-26 21:46:36,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:46:36" (1/1) ... [2018-10-26 21:46:36,190 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:46:36" (1/1) ... [2018-10-26 21:46:36,191 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:46:36" (1/1) ... [2018-10-26 21:46:36,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 21:46:36,193 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 21:46:36,193 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 21:46:36,193 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 21:46:36,194 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:46:36" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a1f674e6-6655-4d02-888b-dbd3ba868e76/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 [2018-10-26 21:46:36,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 21:46:36,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 21:46:36,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 21:46:36,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 21:46:36,327 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 21:46:36,327 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 21:46:36,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-26 21:46:36,328 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-26 21:46:36,504 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 21:46:36,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:46:36 BoogieIcfgContainer [2018-10-26 21:46:36,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 21:46:36,506 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 21:46:36,506 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 21:46:36,509 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 21:46:36,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:46:35" (1/3) ... [2018-10-26 21:46:36,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53ff32b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:46:36, skipping insertion in model container [2018-10-26 21:46:36,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:46:36" (2/3) ... [2018-10-26 21:46:36,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53ff32b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:46:36, skipping insertion in model container [2018-10-26 21:46:36,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:46:36" (3/3) ... [2018-10-26 21:46:36,511 INFO L112 eAbstractionObserver]: Analyzing ICFG Double_div_bad_false-unreach-call.i [2018-10-26 21:46:36,519 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 21:46:36,525 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 21:46:36,540 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 21:46:36,567 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 21:46:36,568 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 21:46:36,568 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 21:46:36,568 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 21:46:36,568 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 21:46:36,568 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 21:46:36,568 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 21:46:36,568 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 21:46:36,583 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-10-26 21:46:36,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-26 21:46:36,588 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:46:36,589 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:46:36,591 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:46:36,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:46:36,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1871509567, now seen corresponding path program 1 times [2018-10-26 21:46:36,598 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 21:46:36,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:46:36,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:46:36,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:46:36,641 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 21:46:36,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:46:36,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:46:36,688 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:46:36,688 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 21:46:36,688 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 21:46:36,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-26 21:46:36,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-26 21:46:36,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-26 21:46:36,705 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-10-26 21:46:36,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:46:36,723 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2018-10-26 21:46:36,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-26 21:46:36,724 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-26 21:46:36,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:46:36,731 INFO L225 Difference]: With dead ends: 31 [2018-10-26 21:46:36,732 INFO L226 Difference]: Without dead ends: 12 [2018-10-26 21:46:36,736 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 [2018-10-26 21:46:36,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-26 21:46:36,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-26 21:46:36,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-26 21:46:36,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-26 21:46:36,772 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-26 21:46:36,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:46:36,772 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-26 21:46:36,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-26 21:46:36,773 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-26 21:46:36,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-26 21:46:36,773 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:46:36,773 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:46:36,774 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:46:36,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:46:36,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1861991801, now seen corresponding path program 1 times [2018-10-26 21:46:36,774 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 21:46:36,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:46:36,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:46:36,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:46:36,775 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 21:46:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-26 21:46:36,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-26 21:46:36,810 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-26 21:46:36,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 09:46:36 BoogieIcfgContainer [2018-10-26 21:46:36,832 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 21:46:36,833 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-26 21:46:36,833 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-26 21:46:36,833 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-26 21:46:36,833 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:46:36" (3/4) ... [2018-10-26 21:46:36,839 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-10-26 21:46:36,839 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-26 21:46:36,839 INFO L168 Benchmark]: Toolchain (without parser) took 858.37 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.2 MB). Free memory was 954.5 MB in the beginning and 1.1 GB in the end (delta: -166.7 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 21:46:36,841 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 980.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 21:46:36,841 INFO L168 Benchmark]: CACSL2BoogieTranslator took 173.54 ms. Allocated memory is still 1.0 GB. Free memory was 954.5 MB in the beginning and 943.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-26 21:46:36,844 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.60 ms. Allocated memory is still 1.0 GB. Free memory is still 943.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 21:46:36,844 INFO L168 Benchmark]: Boogie Preprocessor took 18.47 ms. Allocated memory is still 1.0 GB. Free memory was 943.7 MB in the beginning and 941.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-10-26 21:46:36,845 INFO L168 Benchmark]: RCFGBuilder took 312.07 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.2 MB). Free memory was 941.0 MB in the beginning and 1.1 GB in the end (delta: -204.2 MB). Peak memory consumption was 21.2 MB. Max. memory is 11.5 GB. [2018-10-26 21:46:36,846 INFO L168 Benchmark]: TraceAbstraction took 326.60 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.5 MB). Peak memory consumption was 21.5 MB. Max. memory is 11.5 GB. [2018-10-26 21:46:36,846 INFO L168 Benchmark]: Witness Printer took 6.27 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-10-26 21:46:36,852 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 980.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 173.54 ms. Allocated memory is still 1.0 GB. Free memory was 954.5 MB in the beginning and 943.7 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 17.60 ms. Allocated memory is still 1.0 GB. Free memory is still 943.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.47 ms. Allocated memory is still 1.0 GB. Free memory was 943.7 MB in the beginning and 941.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 312.07 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.2 MB). Free memory was 941.0 MB in the beginning and 1.1 GB in the end (delta: -204.2 MB). Peak memory consumption was 21.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 326.60 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.5 MB). Peak memory consumption was 21.5 MB. Max. memory is 11.5 GB. * Witness Printer took 6.27 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. 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/1.6; 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, 0.2s 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 [2018-10-26 21:46:38,684 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 21:46:38,685 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 21:46:38,694 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 21:46:38,694 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 21:46:38,695 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 21:46:38,696 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 21:46:38,697 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 21:46:38,698 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 21:46:38,699 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 21:46:38,700 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 21:46:38,700 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 21:46:38,701 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 21:46:38,701 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 21:46:38,702 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 21:46:38,703 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 21:46:38,703 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 21:46:38,705 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 21:46:38,706 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 21:46:38,707 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 21:46:38,708 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 21:46:38,709 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 21:46:38,711 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 21:46:38,711 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 21:46:38,711 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 21:46:38,712 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 21:46:38,713 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 21:46:38,713 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 21:46:38,714 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 21:46:38,715 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 21:46:38,715 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 21:46:38,716 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 21:46:38,716 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 21:46:38,716 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 21:46:38,717 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 21:46:38,718 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 21:46:38,718 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_a1f674e6-6655-4d02-888b-dbd3ba868e76/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2018-10-26 21:46:38,729 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 21:46:38,729 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 21:46:38,730 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 21:46:38,730 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-26 21:46:38,730 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-26 21:46:38,731 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-26 21:46:38,731 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-26 21:46:38,731 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-26 21:46:38,731 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 21:46:38,732 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-26 21:46:38,732 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-26 21:46:38,732 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 21:46:38,732 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 21:46:38,732 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 21:46:38,732 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 21:46:38,732 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-10-26 21:46:38,733 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-10-26 21:46:38,733 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-26 21:46:38,733 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 21:46:38,733 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 21:46:38,733 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 21:46:38,733 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 21:46:38,734 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 21:46:38,734 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 21:46:38,734 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 21:46:38,734 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 21:46:38,734 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 21:46:38,734 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 21:46:38,734 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-10-26 21:46:38,735 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 21:46:38,735 INFO L133 SettingsManager]: * Command for external solver=cvc4nyu --tear-down-incremental --rewrite-divk --print-success --lang smt [2018-10-26 21:46:38,735 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-10-26 21:46:38,735 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_a1f674e6-6655-4d02-888b-dbd3ba868e76/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 -> 1d363a30f559764c47bcb73d637f2d7196a1b97b [2018-10-26 21:46:38,773 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 21:46:38,783 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 21:46:38,786 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 21:46:38,787 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 21:46:38,788 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 21:46:38,788 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_a1f674e6-6655-4d02-888b-dbd3ba868e76/bin-2019/utaipan/../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad_false-unreach-call.i [2018-10-26 21:46:38,834 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a1f674e6-6655-4d02-888b-dbd3ba868e76/bin-2019/utaipan/data/83c941bf9/13615ed6d98a4fc68a92d07e8da8ef7c/FLAGd536a3258 [2018-10-26 21:46:39,202 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 21:46:39,202 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_a1f674e6-6655-4d02-888b-dbd3ba868e76/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad_false-unreach-call.i [2018-10-26 21:46:39,207 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a1f674e6-6655-4d02-888b-dbd3ba868e76/bin-2019/utaipan/data/83c941bf9/13615ed6d98a4fc68a92d07e8da8ef7c/FLAGd536a3258 [2018-10-26 21:46:39,223 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_a1f674e6-6655-4d02-888b-dbd3ba868e76/bin-2019/utaipan/data/83c941bf9/13615ed6d98a4fc68a92d07e8da8ef7c [2018-10-26 21:46:39,226 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 21:46:39,227 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-26 21:46:39,228 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 21:46:39,228 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 21:46:39,231 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 21:46:39,232 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:46:39" (1/1) ... [2018-10-26 21:46:39,235 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1791a6b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:46:39, skipping insertion in model container [2018-10-26 21:46:39,235 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:46:39" (1/1) ... [2018-10-26 21:46:39,244 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 21:46:39,259 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 21:46:39,411 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 21:46:39,417 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 21:46:39,432 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 21:46:39,444 INFO L193 MainTranslator]: Completed translation [2018-10-26 21:46:39,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:46:39 WrapperNode [2018-10-26 21:46:39,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 21:46:39,446 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 21:46:39,446 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 21:46:39,446 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 21:46:39,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:46:39" (1/1) ... [2018-10-26 21:46:39,460 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:46:39" (1/1) ... [2018-10-26 21:46:39,466 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 21:46:39,466 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 21:46:39,466 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 21:46:39,466 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 21:46:39,474 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:46:39" (1/1) ... [2018-10-26 21:46:39,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:46:39" (1/1) ... [2018-10-26 21:46:39,475 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:46:39" (1/1) ... [2018-10-26 21:46:39,476 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:46:39" (1/1) ... [2018-10-26 21:46:39,480 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:46:39" (1/1) ... [2018-10-26 21:46:39,486 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:46:39" (1/1) ... [2018-10-26 21:46:39,488 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:46:39" (1/1) ... [2018-10-26 21:46:39,494 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 21:46:39,495 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 21:46:39,495 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 21:46:39,495 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 21:46:39,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:46:39" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a1f674e6-6655-4d02-888b-dbd3ba868e76/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 [2018-10-26 21:46:39,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 21:46:39,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 21:46:39,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 21:46:39,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 21:46:39,539 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 21:46:39,539 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 21:46:39,539 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-26 21:46:39,540 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-26 21:46:40,566 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 21:46:40,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:46:40 BoogieIcfgContainer [2018-10-26 21:46:40,566 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 21:46:40,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 21:46:40,567 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 21:46:40,570 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 21:46:40,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:46:39" (1/3) ... [2018-10-26 21:46:40,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5967dcd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:46:40, skipping insertion in model container [2018-10-26 21:46:40,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:46:39" (2/3) ... [2018-10-26 21:46:40,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5967dcd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:46:40, skipping insertion in model container [2018-10-26 21:46:40,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:46:40" (3/3) ... [2018-10-26 21:46:40,575 INFO L112 eAbstractionObserver]: Analyzing ICFG Double_div_bad_false-unreach-call.i [2018-10-26 21:46:40,585 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 21:46:40,592 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 21:46:40,606 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 21:46:40,632 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 21:46:40,633 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 21:46:40,633 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 21:46:40,633 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 21:46:40,633 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 21:46:40,634 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 21:46:40,634 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 21:46:40,634 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 21:46:40,634 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 21:46:40,651 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-10-26 21:46:40,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-26 21:46:40,656 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:46:40,657 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:46:40,659 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:46:40,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:46:40,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1871509567, now seen corresponding path program 1 times [2018-10-26 21:46:40,668 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-26 21:46:40,668 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a1f674e6-6655-4d02-888b-dbd3ba868e76/bin-2019/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2018-10-26 21:46:40,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2018-10-26 21:46:41,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:46:41,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:46:41,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:46:41,046 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-10-26 21:46:41,060 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:46:41,060 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 21:46:41,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-26 21:46:41,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-26 21:46:41,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-26 21:46:41,075 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-10-26 21:46:41,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:46:41,090 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2018-10-26 21:46:41,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-26 21:46:41,092 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-26 21:46:41,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:46:41,099 INFO L225 Difference]: With dead ends: 31 [2018-10-26 21:46:41,100 INFO L226 Difference]: Without dead ends: 12 [2018-10-26 21:46:41,102 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 [2018-10-26 21:46:41,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-26 21:46:41,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-26 21:46:41,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-26 21:46:41,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-26 21:46:41,130 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-26 21:46:41,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:46:41,131 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-26 21:46:41,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-26 21:46:41,131 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-26 21:46:41,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-26 21:46:41,131 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:46:41,132 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:46:41,132 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:46:41,132 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:46:41,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1861991801, now seen corresponding path program 1 times [2018-10-26 21:46:41,133 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-26 21:46:41,133 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a1f674e6-6655-4d02-888b-dbd3ba868e76/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 [2018-10-26 21:46:41,144 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:46:41,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:46:41,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:46:42,749 WARN L179 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 11 [2018-10-26 21:46:42,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:46:42,767 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-10-26 21:46:42,782 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:46:42,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 21:46:42,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 21:46:42,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 21:46:42,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 21:46:42,784 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 3 states. [2018-10-26 21:46:44,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:46:44,915 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-26 21:46:45,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 21:46:45,569 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-10-26 21:46:45,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:46:45,570 INFO L225 Difference]: With dead ends: 19 [2018-10-26 21:46:45,570 INFO L226 Difference]: Without dead ends: 14 [2018-10-26 21:46:45,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 21:46:45,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-26 21:46:45,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-26 21:46:45,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-26 21:46:45,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-26 21:46:45,577 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-10-26 21:46:45,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:46:45,578 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-26 21:46:45,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 21:46:45,579 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-26 21:46:45,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-26 21:46:45,579 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:46:45,579 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:46:45,580 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:46:45,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:46:45,580 INFO L82 PathProgramCache]: Analyzing trace with hash -661808769, now seen corresponding path program 1 times [2018-10-26 21:46:45,580 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-26 21:46:45,580 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a1f674e6-6655-4d02-888b-dbd3ba868e76/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 [2018-10-26 21:46:45,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:46:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:46:46,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:46:50,421 WARN L179 SmtUtils]: Spent 2.60 s on a formula simplification that was a NOOP. DAG size: 12 [2018-10-26 21:46:50,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:46:50,434 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 21:47:06,068 WARN L179 SmtUtils]: Spent 3.96 s on a formula simplification that was a NOOP. DAG size: 7 [2018-10-26 21:47:06,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:47:06,091 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:47:06,091 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a1f674e6-6655-4d02-888b-dbd3ba868e76/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 [2018-10-26 21:47:06,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:47:18,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2018-10-26 21:47:19,468 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:47:19,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-10-26 21:47:19,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 21:47:19,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 21:47:19,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=15, Unknown=3, NotChecked=0, Total=30 [2018-10-26 21:47:19,470 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2018-10-26 21:47:30,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:47:30,587 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2018-10-26 21:47:30,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 21:47:30,588 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-10-26 21:47:30,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:47:30,588 INFO L225 Difference]: With dead ends: 23 [2018-10-26 21:47:30,588 INFO L226 Difference]: Without dead ends: 18 [2018-10-26 21:47:30,589 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=17, Invalid=21, Unknown=4, NotChecked=0, Total=42 [2018-10-26 21:47:30,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-26 21:47:30,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-26 21:47:30,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-26 21:47:30,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-26 21:47:30,592 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 13 [2018-10-26 21:47:30,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:47:30,592 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-26 21:47:30,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 21:47:30,593 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-26 21:47:30,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-26 21:47:30,593 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:47:30,593 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:47:30,593 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:47:30,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:47:30,595 INFO L82 PathProgramCache]: Analyzing trace with hash 2058417419, now seen corresponding path program 2 times [2018-10-26 21:47:30,595 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-26 21:47:30,595 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a1f674e6-6655-4d02-888b-dbd3ba868e76/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 [2018-10-26 21:47:30,599 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-10-26 21:47:31,452 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 21:47:31,452 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:47:31,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:47:37,632 WARN L179 SmtUtils]: Spent 849.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-26 21:47:37,639 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:47:37,639 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 21:47:47,994 WARN L854 $PredicateComparison]: unable to prove that (or (fp.eq c_main_~x1~0 ((_ to_fp 11 53) RNE (_ bv0 32))) (not (fp.eq (fp.div RNE c_main_~x1~0 ((_ to_fp 11 53) RNE (/ 8.0 5.0))) c_main_~x1~0))) is different from true [2018-10-26 21:47:50,412 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (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 false [2018-10-26 21:47:52,838 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (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 [2018-10-26 21:47:55,446 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (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 [2018-10-26 21:47:58,035 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (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 [2018-10-26 21:47:58,056 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 12 not checked. [2018-10-26 21:47:58,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:47:58,079 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a1f674e6-6655-4d02-888b-dbd3ba868e76/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 [2018-10-26 21:47:58,085 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 21:48:14,436 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 21:48:14,436 INFO L250 tOrderPrioritization]: Conjunction of SSA is unknown [2018-10-26 21:48:16,905 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:48:16,905 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2018-10-26 21:48:16,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-26 21:48:16,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-26 21:48:16,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=70, Unknown=7, NotChecked=54, Total=156 [2018-10-26 21:48:16,906 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 13 states. [2018-10-26 21:48:19,546 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0))) (.cse2 ((_ to_fp 11 53) RNE (_ bv0 32)))) (and (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 .cse2))) (= c_main_~x1~0 (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse1)) (or (fp.eq c_main_~x~0 .cse2) (not (fp.eq c_main_~x1~0 c_main_~x~0))))) is different from true [2018-10-26 21:48:21,968 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (= c_main_~x1~0 (fp.div RNE (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse0) .cse0)) (let ((.cse1 (fp.div RNE c_main_~x1~0 .cse0))) (or (fp.eq .cse1 ((_ to_fp 11 53) RNE (_ bv0 32))) (not (fp.eq (fp.div RNE .cse1 .cse0) .cse1)))))) is different from true [2018-10-26 21:48:30,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:48:30,249 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2018-10-26 21:48:30,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-26 21:48:30,250 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2018-10-26 21:48:30,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:48:30,251 INFO L225 Difference]: With dead ends: 30 [2018-10-26 21:48:30,251 INFO L226 Difference]: Without dead ends: 22 [2018-10-26 21:48:30,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.8s TimeCoverageRelationStatistics Valid=33, Invalid=88, Unknown=9, NotChecked=110, Total=240 [2018-10-26 21:48:30,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-26 21:48:30,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-26 21:48:30,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-26 21:48:30,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-26 21:48:30,256 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 17 [2018-10-26 21:48:30,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:48:30,257 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-26 21:48:30,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-26 21:48:30,257 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-26 21:48:30,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-26 21:48:30,258 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:48:30,259 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:48:30,260 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:48:30,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:48:30,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1566812823, now seen corresponding path program 3 times [2018-10-26 21:48:30,260 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-26 21:48:30,260 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a1f674e6-6655-4d02-888b-dbd3ba868e76/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 [2018-10-26 21:48:30,265 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-10-26 21:48:31,757 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-26 21:48:31,757 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:48:31,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:48:34,164 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (= c_main_~x1~0 (fp.div RNE c_main_~x~0 .cse0)) (= c_main_~x~0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse0) .cse0) .cse0) .cse0) .cse0)))) is different from true [2018-10-26 21:48:34,168 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2018-10-26 21:48:34,168 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 21:48:38,334 WARN L854 $PredicateComparison]: unable to prove that (or (fp.eq c_main_~x1~0 ((_ to_fp 11 53) RNE (_ bv0 32))) (not (fp.eq (fp.div RNE c_main_~x1~0 ((_ to_fp 11 53) RNE (/ 8.0 5.0))) c_main_~x1~0))) is different from true [2018-10-26 21:48:40,771 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (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 false [2018-10-26 21:48:43,180 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (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 [2018-10-26 21:48:45,782 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (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 [2018-10-26 21:48:48,392 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (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 [2018-10-26 21:48:51,175 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .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 [2018-10-26 21:48:53,973 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .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 [2018-10-26 21:48:56,945 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .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 [2018-10-26 21:48:59,925 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .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 [2018-10-26 21:48:59,960 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 30 not checked. [2018-10-26 21:48:59,983 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:48:59,983 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a1f674e6-6655-4d02-888b-dbd3ba868e76/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 [2018-10-26 21:48:59,992 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 21:49:54,569 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-26 21:49:54,569 INFO L250 tOrderPrioritization]: Conjunction of SSA is unknown [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (9)] Forcibly destroying the process [2018-10-26 21:49:56,489 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:49:56,489 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2018-10-26 21:49:56,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-26 21:49:56,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-26 21:49:56,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=92, Unknown=10, NotChecked=138, Total=272 [2018-10-26 21:49:56,490 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 17 states. [2018-10-26 21:49:59,613 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (_ bv0 32))) (.cse0 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (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 (fp.div RNE c_main_~x1~0 .cse0) .cse0) .cse0) .cse0))) (or (not (fp.eq (fp.div RNE .cse2 .cse0) .cse2)) (fp.eq .cse2 .cse1))))) is different from true [2018-10-26 21:50:02,459 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (= c_main_~x1~0 (fp.div RNE (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse0) .cse0)) (let ((.cse1 (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse0) .cse0) .cse0))) (or (not (fp.eq (fp.div RNE .cse1 .cse0) .cse1)) (fp.eq .cse1 ((_ to_fp 11 53) RNE (_ bv0 32))))))) is different from true [2018-10-26 21:50:05,095 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (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))))) (= 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 [2018-10-26 21:50:07,531 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (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 (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse1) .cse1) .cse1) .cse1)))) is different from true [2018-10-26 21:50:21,229 WARN L179 SmtUtils]: Spent 8.54 s on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2018-10-26 21:50:28,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:50:28,310 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-10-26 21:50:28,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-26 21:50:28,311 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2018-10-26 21:50:28,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:50:28,312 INFO L225 Difference]: With dead ends: 34 [2018-10-26 21:50:28,312 INFO L226 Difference]: Without dead ends: 26 [2018-10-26 21:50:28,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 50.3s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=14, NotChecked=310, Total=506 [2018-10-26 21:50:28,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-26 21:50:28,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-26 21:50:28,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-26 21:50:28,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-26 21:50:28,318 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 21 [2018-10-26 21:50:28,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:50:28,319 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-26 21:50:28,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-26 21:50:28,319 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-26 21:50:28,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-26 21:50:28,319 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:50:28,319 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:50:28,320 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:50:28,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:50:28,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1788298717, now seen corresponding path program 4 times [2018-10-26 21:50:28,320 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-26 21:50:28,320 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a1f674e6-6655-4d02-888b-dbd3ba868e76/bin-2019/utaipan/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2018-10-26 21:50:28,325 INFO L101 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 21:50:30,156 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 21:50:30,156 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:50:30,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:50:46,676 WARN L179 SmtUtils]: Spent 1.94 s on a formula simplification that was a NOOP. DAG size: 18 [2018-10-26 21:50:46,680 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:50:46,680 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 21:50:50,994 WARN L832 $PredicateComparison]: unable to prove that (not (fp.eq (fp.div RNE c_main_~x1~0 ((_ to_fp 11 53) RNE (/ 8.0 5.0))) c_main_~x1~0)) is different from false [2018-10-26 21:50:54,032 WARN L832 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE c_main_~x1~0 .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from false [2018-10-26 21:50:58,189 WARN L832 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from false [2018-10-26 21:51:00,870 WARN L854 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from true [2018-10-26 21:51:03,760 WARN L832 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from false [2018-10-26 21:51:06,620 WARN L854 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from true [2018-10-26 21:51:09,701 WARN L832 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from false [2018-10-26 21:51:12,805 WARN L854 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from true [2018-10-26 21:51:16,070 WARN L832 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from false [2018-10-26 21:51:19,402 WARN L854 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from true [2018-10-26 21:51:22,690 WARN L832 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from false [2018-10-26 21:51:26,252 WARN L854 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from true [2018-10-26 21:51:26,273 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 56 not checked. [2018-10-26 21:51:26,301 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:51:26,301 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a1f674e6-6655-4d02-888b-dbd3ba868e76/bin-2019/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 21:51:26,307 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 21:51:50,333 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 21:51:50,333 INFO L250 tOrderPrioritization]: Conjunction of SSA is unknown [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (11)] Forcibly destroying the process [2018-10-26 21:51:51,988 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 21:51:51,988 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2018-10-26 21:51:51,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-26 21:51:51,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-26 21:51:51,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=89, Unknown=15, NotChecked=168, Total=306 [2018-10-26 21:51:51,989 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 18 states. [2018-10-26 21:51:55,445 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (not (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0))) (= c_main_~x1~0 (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse1)) (not (fp.eq c_main_~x1~0 c_main_~x~0)))) is different from true [2018-10-26 21:51:58,718 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (= c_main_~x1~0 (fp.div RNE (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse0) .cse0)) (not (let ((.cse1 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse0) .cse0) .cse0) .cse0) .cse0))) (fp.eq (fp.div RNE .cse1 .cse0) .cse1))))) is different from true [2018-10-26 21:52:01,783 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (not (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1) .cse1))) (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 [2018-10-26 21:52:04,633 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (not (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0))) (= c_main_~x1~0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse1) .cse1) .cse1) .cse1)))) is different from true [2018-10-26 21:52:07,285 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (not (let ((.cse0 (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0))) (= c_main_~x1~0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse1) .cse1) .cse1) .cse1) .cse1)))) is different from true [2018-10-26 21:52:09,716 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (= c_main_~x1~0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0)) (not (let ((.cse1 (fp.div RNE c_main_~x1~0 .cse0))) (fp.eq (fp.div RNE .cse1 .cse0) .cse1))))) is different from true [2018-10-26 21:52:11,933 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (= c_main_~x1~0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0)) (not (fp.eq (fp.div RNE c_main_~x1~0 .cse0) c_main_~x1~0)))) is different from true [2018-10-26 21:52:14,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:52:14,936 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2018-10-26 21:52:14,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-26 21:52:14,942 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 25 [2018-10-26 21:52:14,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:52:14,943 INFO L225 Difference]: With dead ends: 35 [2018-10-26 21:52:14,943 INFO L226 Difference]: Without dead ends: 30 [2018-10-26 21:52:14,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 14 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 75.8s TimeCoverageRelationStatistics Valid=48, Invalid=96, Unknown=22, NotChecked=434, Total=600 [2018-10-26 21:52:14,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-26 21:52:14,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-26 21:52:14,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-26 21:52:14,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-26 21:52:14,948 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 25 [2018-10-26 21:52:14,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:52:14,948 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-26 21:52:14,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-26 21:52:14,949 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-26 21:52:14,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-26 21:52:14,949 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:52:14,949 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:52:14,949 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:52:14,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:52:14,950 INFO L82 PathProgramCache]: Analyzing trace with hash 503522223, now seen corresponding path program 5 times [2018-10-26 21:52:14,957 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-26 21:52:14,958 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a1f674e6-6655-4d02-888b-dbd3ba868e76/bin-2019/utaipan/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2018-10-26 21:52:14,961 INFO L101 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2018-10-26 21:52:18,980 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-26 21:52:18,980 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:52:19,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:52:21,501 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (= c_main_~x1~0 (fp.div RNE c_main_~x~0 .cse0)) (= c_main_~x~0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0)))) is different from true [2018-10-26 21:52:21,511 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 18 not checked. [2018-10-26 21:52:21,511 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 21:52:23,770 WARN L832 $PredicateComparison]: unable to prove that (not (fp.eq (fp.div RNE c_main_~x1~0 ((_ to_fp 11 53) RNE (/ 8.0 5.0))) c_main_~x1~0)) is different from false [2018-10-26 21:52:26,792 WARN L832 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE c_main_~x1~0 .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from false [2018-10-26 21:52:29,216 WARN L854 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE c_main_~x1~0 .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from true [2018-10-26 21:52:31,849 WARN L832 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from false [2018-10-26 21:52:34,493 WARN L854 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from true [2018-10-26 21:52:37,372 WARN L832 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from false [2018-10-26 21:52:40,272 WARN L854 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from true [2018-10-26 21:52:43,400 WARN L832 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from false [2018-10-26 21:52:46,490 WARN L854 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from true [2018-10-26 21:52:49,791 WARN L832 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from false [2018-10-26 21:52:53,122 WARN L854 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from true [2018-10-26 21:52:54,993 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2018-10-26 21:52:55,194 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 mathsat -unsat_core_generation=3 [2018-10-26 21:52:55,195 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:225) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.checkSat(ManagedScript.java:141) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:84) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:823) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:767) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:339) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:299) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:575) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:418) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:290) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.MultiTrackRefinementStrategy.getTraceCheck(MultiTrackRefinementStrategy.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:435) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:312) 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) ... 40 more [2018-10-26 21:52:55,197 INFO L168 Benchmark]: Toolchain (without parser) took 375971.00 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 175.6 MB). Free memory was 951.9 MB in the beginning and 935.1 MB in the end (delta: 16.8 MB). Peak memory consumption was 192.5 MB. Max. memory is 11.5 GB. [2018-10-26 21:52:55,198 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. [2018-10-26 21:52:55,199 INFO L168 Benchmark]: CACSL2BoogieTranslator took 217.56 ms. Allocated memory is still 1.0 GB. Free memory was 951.9 MB in the beginning and 941.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-26 21:52:55,199 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.97 ms. Allocated memory is still 1.0 GB. Free memory is still 941.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 21:52:55,199 INFO L168 Benchmark]: Boogie Preprocessor took 29.05 ms. Allocated memory is still 1.0 GB. Free memory was 941.1 MB in the beginning and 935.8 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-10-26 21:52:55,200 INFO L168 Benchmark]: RCFGBuilder took 1071.16 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 175.6 MB). Free memory was 935.8 MB in the beginning and 1.2 GB in the end (delta: -221.3 MB). Peak memory consumption was 21.8 MB. Max. memory is 11.5 GB. [2018-10-26 21:52:55,201 INFO L168 Benchmark]: TraceAbstraction took 374629.94 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 935.1 MB in the end (delta: 222.0 MB). Peak memory consumption was 222.0 MB. Max. memory is 11.5 GB. [2018-10-26 21:52:55,215 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 217.56 ms. Allocated memory is still 1.0 GB. Free memory was 951.9 MB in the beginning and 941.1 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 19.97 ms. Allocated memory is still 1.0 GB. Free memory is still 941.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 29.05 ms. Allocated memory is still 1.0 GB. Free memory was 941.1 MB in the beginning and 935.8 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 1071.16 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 175.6 MB). Free memory was 935.8 MB in the beginning and 1.2 GB in the end (delta: -221.3 MB). Peak memory consumption was 21.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 374629.94 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 935.1 MB in the end (delta: 222.0 MB). Peak memory consumption was 222.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : 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...