./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_bb1fca6f-4f8e-4a38-9dc3-2d242df3e6f3/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_bb1fca6f-4f8e-4a38-9dc3-2d242df3e6f3/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_bb1fca6f-4f8e-4a38-9dc3-2d242df3e6f3/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_bb1fca6f-4f8e-4a38-9dc3-2d242df3e6f3/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_bb1fca6f-4f8e-4a38-9dc3-2d242df3e6f3/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_bb1fca6f-4f8e-4a38-9dc3-2d242df3e6f3/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d861a67fd24091b9e1d344eca64b2dd8db9fc27c ............................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_bb1fca6f-4f8e-4a38-9dc3-2d242df3e6f3/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_bb1fca6f-4f8e-4a38-9dc3-2d242df3e6f3/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_bb1fca6f-4f8e-4a38-9dc3-2d242df3e6f3/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_bb1fca6f-4f8e-4a38-9dc3-2d242df3e6f3/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_bb1fca6f-4f8e-4a38-9dc3-2d242df3e6f3/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_bb1fca6f-4f8e-4a38-9dc3-2d242df3e6f3/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d861a67fd24091b9e1d344eca64b2dd8db9fc27c .......................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 19:10:16,405 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 19:10:16,416 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 19:10:16,485 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 19:10:16,486 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 19:10:16,492 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 19:10:16,496 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 19:10:16,500 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 19:10:16,504 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 19:10:16,510 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 19:10:16,511 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 19:10:16,513 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 19:10:16,513 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 19:10:16,514 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 19:10:16,516 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 19:10:16,517 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 19:10:16,518 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 19:10:16,520 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 19:10:16,522 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 19:10:16,525 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 19:10:16,527 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 19:10:16,528 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 19:10:16,530 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 19:10:16,531 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 19:10:16,534 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 19:10:16,535 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 19:10:16,535 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 19:10:16,537 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 19:10:16,537 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 19:10:16,539 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 19:10:16,539 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 19:10:16,540 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 19:10:16,541 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 19:10:16,542 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 19:10:16,543 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 19:10:16,544 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 19:10:16,544 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 19:10:16,545 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 19:10:16,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 19:10:16,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 19:10:16,547 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 19:10:16,548 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_bb1fca6f-4f8e-4a38-9dc3-2d242df3e6f3/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 19:10:16,591 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 19:10:16,592 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 19:10:16,594 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 19:10:16,594 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 19:10:16,594 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 19:10:16,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 19:10:16,595 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 19:10:16,595 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 19:10:16,596 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 19:10:16,596 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 19:10:16,597 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 19:10:16,597 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 19:10:16,598 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 19:10:16,598 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 19:10:16,598 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 19:10:16,599 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 19:10:16,599 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 19:10:16,599 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 19:10:16,599 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 19:10:16,600 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 19:10:16,600 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 19:10:16,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:10:16,601 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 19:10:16,601 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 19:10:16,601 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 19:10:16,601 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 19:10:16,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 19:10:16,602 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 19:10:16,602 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 19:10:16,602 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_bb1fca6f-4f8e-4a38-9dc3-2d242df3e6f3/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_bb1fca6f-4f8e-4a38-9dc3-2d242df3e6f3/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d861a67fd24091b9e1d344eca64b2dd8db9fc27c [2020-11-29 19:10:16,919 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 19:10:16,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 19:10:16,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 19:10:16,969 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 19:10:16,970 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 19:10:16,971 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_bb1fca6f-4f8e-4a38-9dc3-2d242df3e6f3/bin/uautomizer/../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound2.c [2020-11-29 19:10:17,070 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bb1fca6f-4f8e-4a38-9dc3-2d242df3e6f3/bin/uautomizer/data/7752cd888/bdd44bedfd294a7d951d013a48defbb5/FLAG331e74f0b [2020-11-29 19:10:17,687 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 19:10:17,687 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_bb1fca6f-4f8e-4a38-9dc3-2d242df3e6f3/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound2.c [2020-11-29 19:10:17,700 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bb1fca6f-4f8e-4a38-9dc3-2d242df3e6f3/bin/uautomizer/data/7752cd888/bdd44bedfd294a7d951d013a48defbb5/FLAG331e74f0b [2020-11-29 19:10:18,059 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_bb1fca6f-4f8e-4a38-9dc3-2d242df3e6f3/bin/uautomizer/data/7752cd888/bdd44bedfd294a7d951d013a48defbb5 [2020-11-29 19:10:18,063 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 19:10:18,065 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 19:10:18,067 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 19:10:18,068 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 19:10:18,071 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 19:10:18,072 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:10:18" (1/1) ... [2020-11-29 19:10:18,075 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12f195c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:10:18, skipping insertion in model container [2020-11-29 19:10:18,076 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:10:18" (1/1) ... [2020-11-29 19:10:18,084 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 19:10:18,100 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 19:10:18,277 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:10:18,287 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 19:10:18,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:10:18,352 INFO L208 MainTranslator]: Completed translation [2020-11-29 19:10:18,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:10:18 WrapperNode [2020-11-29 19:10:18,353 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 19:10:18,355 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 19:10:18,359 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 19:10:18,360 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 19:10:18,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:10:18" (1/1) ... [2020-11-29 19:10:18,378 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:10:18" (1/1) ... [2020-11-29 19:10:18,398 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 19:10:18,399 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 19:10:18,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 19:10:18,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 19:10:18,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:10:18" (1/1) ... [2020-11-29 19:10:18,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:10:18" (1/1) ... [2020-11-29 19:10:18,411 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:10:18" (1/1) ... [2020-11-29 19:10:18,412 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:10:18" (1/1) ... [2020-11-29 19:10:18,417 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:10:18" (1/1) ... [2020-11-29 19:10:18,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:10:18" (1/1) ... [2020-11-29 19:10:18,422 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:10:18" (1/1) ... [2020-11-29 19:10:18,425 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 19:10:18,426 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 19:10:18,426 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 19:10:18,426 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 19:10:18,427 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:10:18" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bb1fca6f-4f8e-4a38-9dc3-2d242df3e6f3/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:10:18,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 19:10:18,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 19:10:18,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 19:10:18,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 19:10:19,024 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 19:10:19,025 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-11-29 19:10:19,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:10:19 BoogieIcfgContainer [2020-11-29 19:10:19,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 19:10:19,030 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 19:10:19,031 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 19:10:19,036 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 19:10:19,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:10:18" (1/3) ... [2020-11-29 19:10:19,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65b07649 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:10:19, skipping insertion in model container [2020-11-29 19:10:19,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:10:18" (2/3) ... [2020-11-29 19:10:19,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65b07649 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:10:19, skipping insertion in model container [2020-11-29 19:10:19,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:10:19" (3/3) ... [2020-11-29 19:10:19,040 INFO L111 eAbstractionObserver]: Analyzing ICFG freire1_unwindbound2.c [2020-11-29 19:10:19,053 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 19:10:19,058 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-29 19:10:19,072 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-29 19:10:19,117 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 19:10:19,119 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 19:10:19,119 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 19:10:19,119 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 19:10:19,120 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 19:10:19,120 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 19:10:19,120 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 19:10:19,120 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 19:10:19,139 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-11-29 19:10:19,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-29 19:10:19,147 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:10:19,148 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-29 19:10:19,149 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:10:19,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:10:19,156 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2020-11-29 19:10:19,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:10:19,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852930288] [2020-11-29 19:10:19,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:10:19,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:10:19,330 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:10:19,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:10:19,385 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:10:19,419 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:10:19,420 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 19:10:19,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 19:10:19,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 07:10:19 BoogieIcfgContainer [2020-11-29 19:10:19,463 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 19:10:19,466 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 19:10:19,467 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 19:10:19,467 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 19:10:19,468 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:10:19" (3/4) ... [2020-11-29 19:10:19,473 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-29 19:10:19,473 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 19:10:19,477 INFO L168 Benchmark]: Toolchain (without parser) took 1409.11 ms. Allocated memory is still 96.5 MB. Free memory was 66.0 MB in the beginning and 46.9 MB in the end (delta: 19.1 MB). Peak memory consumption was 16.0 MB. Max. memory is 16.1 GB. [2020-11-29 19:10:19,478 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 96.5 MB. Free memory is still 55.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:10:19,481 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.74 ms. Allocated memory is still 96.5 MB. Free memory was 65.8 MB in the beginning and 74.2 MB in the end (delta: -8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 19:10:19,483 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.83 ms. Allocated memory is still 96.5 MB. Free memory was 74.2 MB in the beginning and 72.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:10:19,484 INFO L168 Benchmark]: Boogie Preprocessor took 25.70 ms. Allocated memory is still 96.5 MB. Free memory was 72.8 MB in the beginning and 71.8 MB in the end (delta: 983.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:10:19,485 INFO L168 Benchmark]: RCFGBuilder took 602.35 ms. Allocated memory is still 96.5 MB. Free memory was 71.4 MB in the beginning and 59.9 MB in the end (delta: 11.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-29 19:10:19,487 INFO L168 Benchmark]: TraceAbstraction took 433.49 ms. Allocated memory is still 96.5 MB. Free memory was 59.5 MB in the beginning and 47.4 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-29 19:10:19,488 INFO L168 Benchmark]: Witness Printer took 6.95 ms. Allocated memory is still 96.5 MB. Free memory was 47.4 MB in the beginning and 46.9 MB in the end (delta: 460.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:10:19,500 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 96.5 MB. Free memory is still 55.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 286.74 ms. Allocated memory is still 96.5 MB. Free memory was 65.8 MB in the beginning and 74.2 MB in the end (delta: -8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.83 ms. Allocated memory is still 96.5 MB. Free memory was 74.2 MB in the beginning and 72.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.70 ms. Allocated memory is still 96.5 MB. Free memory was 72.8 MB in the beginning and 71.8 MB in the end (delta: 983.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 602.35 ms. Allocated memory is still 96.5 MB. Free memory was 71.4 MB in the beginning and 59.9 MB in the end (delta: 11.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 433.49 ms. Allocated memory is still 96.5 MB. Free memory was 59.5 MB in the beginning and 47.4 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Witness Printer took 6.95 ms. Allocated memory is still 96.5 MB. Free memory was 47.4 MB in the beginning and 46.9 MB in the end (delta: 460.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 10]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of to_int at line 33, overapproximation of someBinaryArithmeticDOUBLEoperation at line 29. Possible FailurePath: [L24] int counter = 0; VAL [counter=0] [L26] int r; [L27] double a, x; [L28] a = __VERIFIER_nondet_double() [L29] x = a / 2.0 [L30] r = 0 VAL [counter=0] [L32] EXPR counter++ VAL [counter=1] [L32] COND TRUE counter++<2 [L17] COND TRUE !(cond) VAL [counter=1] [L10] __assert_fail("0", "freire1.c", 10, "reach_error") VAL [counter=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-a4ecdab [2020-11-29 19:10:22,562 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 19:10:22,565 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 19:10:22,619 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 19:10:22,620 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 19:10:22,622 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 19:10:22,624 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 19:10:22,627 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 19:10:22,630 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 19:10:22,632 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 19:10:22,633 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 19:10:22,635 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 19:10:22,636 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 19:10:22,638 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 19:10:22,640 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 19:10:22,641 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 19:10:22,643 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 19:10:22,644 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 19:10:22,647 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 19:10:22,650 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 19:10:22,652 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 19:10:22,654 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 19:10:22,657 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 19:10:22,658 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 19:10:22,663 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 19:10:22,663 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 19:10:22,664 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 19:10:22,665 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 19:10:22,666 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 19:10:22,668 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 19:10:22,669 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 19:10:22,670 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 19:10:22,672 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 19:10:22,673 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 19:10:22,675 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 19:10:22,675 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 19:10:22,677 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 19:10:22,677 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 19:10:22,678 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 19:10:22,681 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 19:10:22,684 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 19:10:22,686 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_bb1fca6f-4f8e-4a38-9dc3-2d242df3e6f3/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-11-29 19:10:22,741 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 19:10:22,744 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 19:10:22,748 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 19:10:22,749 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 19:10:22,749 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 19:10:22,750 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 19:10:22,750 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 19:10:22,750 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 19:10:22,750 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 19:10:22,751 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 19:10:22,752 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 19:10:22,752 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 19:10:22,753 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-29 19:10:22,753 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-29 19:10:22,753 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 19:10:22,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 19:10:22,754 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 19:10:22,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 19:10:22,754 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 19:10:22,755 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 19:10:22,755 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 19:10:22,755 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 19:10:22,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:10:22,756 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 19:10:22,756 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 19:10:22,756 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 19:10:22,757 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-11-29 19:10:22,757 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-29 19:10:22,757 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 19:10:22,758 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 19:10:22,758 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-29 19:10:22,758 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_bb1fca6f-4f8e-4a38-9dc3-2d242df3e6f3/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_bb1fca6f-4f8e-4a38-9dc3-2d242df3e6f3/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d861a67fd24091b9e1d344eca64b2dd8db9fc27c [2020-11-29 19:10:23,212 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 19:10:23,256 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 19:10:23,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 19:10:23,263 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 19:10:23,264 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 19:10:23,265 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_bb1fca6f-4f8e-4a38-9dc3-2d242df3e6f3/bin/uautomizer/../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound2.c [2020-11-29 19:10:23,373 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bb1fca6f-4f8e-4a38-9dc3-2d242df3e6f3/bin/uautomizer/data/3adc26c02/bd51833f87934ac9b28be855038a199d/FLAGfe1355ed8 [2020-11-29 19:10:24,075 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 19:10:24,078 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_bb1fca6f-4f8e-4a38-9dc3-2d242df3e6f3/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound2.c [2020-11-29 19:10:24,086 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bb1fca6f-4f8e-4a38-9dc3-2d242df3e6f3/bin/uautomizer/data/3adc26c02/bd51833f87934ac9b28be855038a199d/FLAGfe1355ed8 [2020-11-29 19:10:24,108 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_bb1fca6f-4f8e-4a38-9dc3-2d242df3e6f3/bin/uautomizer/data/3adc26c02/bd51833f87934ac9b28be855038a199d [2020-11-29 19:10:24,113 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 19:10:24,116 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 19:10:24,118 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 19:10:24,119 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 19:10:24,124 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 19:10:24,125 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:10:24" (1/1) ... [2020-11-29 19:10:24,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d930b32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:10:24, skipping insertion in model container [2020-11-29 19:10:24,134 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:10:24" (1/1) ... [2020-11-29 19:10:24,148 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 19:10:24,168 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 19:10:24,349 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:10:24,375 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 19:10:24,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:10:24,455 INFO L208 MainTranslator]: Completed translation [2020-11-29 19:10:24,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:10:24 WrapperNode [2020-11-29 19:10:24,456 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 19:10:24,457 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 19:10:24,457 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 19:10:24,457 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 19:10:24,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:10:24" (1/1) ... [2020-11-29 19:10:24,496 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:10:24" (1/1) ... [2020-11-29 19:10:24,545 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 19:10:24,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 19:10:24,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 19:10:24,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 19:10:24,558 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:10:24" (1/1) ... [2020-11-29 19:10:24,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:10:24" (1/1) ... [2020-11-29 19:10:24,568 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:10:24" (1/1) ... [2020-11-29 19:10:24,569 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:10:24" (1/1) ... [2020-11-29 19:10:24,591 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:10:24" (1/1) ... [2020-11-29 19:10:24,604 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:10:24" (1/1) ... [2020-11-29 19:10:24,611 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:10:24" (1/1) ... [2020-11-29 19:10:24,615 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 19:10:24,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 19:10:24,621 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 19:10:24,622 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 19:10:24,623 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:10:24" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bb1fca6f-4f8e-4a38-9dc3-2d242df3e6f3/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:10:24,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-29 19:10:24,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 19:10:24,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 19:10:24,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 19:10:30,177 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 19:10:30,178 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-11-29 19:10:30,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:10:30 BoogieIcfgContainer [2020-11-29 19:10:30,179 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 19:10:30,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 19:10:30,182 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 19:10:30,185 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 19:10:30,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:10:24" (1/3) ... [2020-11-29 19:10:30,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55bf9005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:10:30, skipping insertion in model container [2020-11-29 19:10:30,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:10:24" (2/3) ... [2020-11-29 19:10:30,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55bf9005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:10:30, skipping insertion in model container [2020-11-29 19:10:30,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:10:30" (3/3) ... [2020-11-29 19:10:30,188 INFO L111 eAbstractionObserver]: Analyzing ICFG freire1_unwindbound2.c [2020-11-29 19:10:30,200 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 19:10:30,204 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-29 19:10:30,219 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-29 19:10:30,263 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 19:10:30,263 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 19:10:30,263 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 19:10:30,264 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 19:10:30,264 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 19:10:30,264 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 19:10:30,264 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 19:10:30,265 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 19:10:30,280 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-11-29 19:10:30,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-29 19:10:30,286 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:10:30,287 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-29 19:10:30,288 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:10:30,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:10:30,296 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2020-11-29 19:10:30,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 19:10:30,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093887190] [2020-11-29 19:10:30,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bb1fca6f-4f8e-4a38-9dc3-2d242df3e6f3/bin/uautomizer/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-11-29 19:10:34,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:10:34,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 19:10:34,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:10:37,608 WARN L193 SmtUtils]: Spent 2.41 s on a formula simplification that was a NOOP. DAG size: 13 [2020-11-29 19:10:57,126 WARN L193 SmtUtils]: Spent 9.06 s on a formula simplification that was a NOOP. DAG size: 25 [2020-11-29 19:11:03,302 WARN L838 $PredicateComparison]: unable to prove that (exists ((ULTIMATE.start_main_~a~0 (_ FloatingPoint 11 53))) (not (= ((_ fp.to_sbv 32) roundTowardZero (fp.add roundNearestTiesToEven (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))) (fp.sub roundNearestTiesToEven (fp.sub roundNearestTiesToEven .cse0 ULTIMATE.start_main_~a~0) .cse0)) (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (_ bv2 32)) (fp.div roundNearestTiesToEven ULTIMATE.start_main_~a~0 ((_ to_fp 11 53) roundNearestTiesToEven 2.0))))) (_ bv0 32)))) is different from false [2020-11-29 19:11:05,349 WARN L860 $PredicateComparison]: unable to prove that (exists ((ULTIMATE.start_main_~a~0 (_ FloatingPoint 11 53))) (not (= ((_ fp.to_sbv 32) roundTowardZero (fp.add roundNearestTiesToEven (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))) (fp.sub roundNearestTiesToEven (fp.sub roundNearestTiesToEven .cse0 ULTIMATE.start_main_~a~0) .cse0)) (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (_ bv2 32)) (fp.div roundNearestTiesToEven ULTIMATE.start_main_~a~0 ((_ to_fp 11 53) roundNearestTiesToEven 2.0))))) (_ bv0 32)))) is different from true [2020-11-29 19:11:05,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:11:05,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 19:11:09,823 WARN L838 $PredicateComparison]: unable to prove that (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0)))) is different from false [2020-11-29 19:11:11,888 WARN L860 $PredicateComparison]: unable to prove that (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0)))) is different from true [2020-11-29 19:11:13,950 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~a~0_8 (_ FloatingPoint 11 53))) (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode .cse0 v_ULTIMATE.start_main_~a~0_8) .cse0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) (fp.div c_currentRoundingMode v_ULTIMATE.start_main_~a~0_8 ((_ to_fp 11 53) c_currentRoundingMode 2.0))))) (_ bv0 32))) is different from false [2020-11-29 19:11:15,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:11:15,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093887190] [2020-11-29 19:11:15,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:11:15,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 8 [2020-11-29 19:11:15,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835324691] [2020-11-29 19:11:15,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 19:11:15,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 19:11:15,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 19:11:15,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=20, Unknown=6, NotChecked=30, Total=72 [2020-11-29 19:11:15,467 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 9 states. [2020-11-29 19:11:17,681 WARN L838 $PredicateComparison]: unable to prove that (and (= c_currentRoundingMode roundNearestTiesToEven) (forall ((v_ULTIMATE.start_main_~a~0_8 (_ FloatingPoint 11 53))) (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode .cse0 v_ULTIMATE.start_main_~a~0_8) .cse0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) (fp.div c_currentRoundingMode v_ULTIMATE.start_main_~a~0_8 ((_ to_fp 11 53) c_currentRoundingMode 2.0))))) (_ bv0 32)))) is different from false [2020-11-29 19:11:19,735 WARN L860 $PredicateComparison]: unable to prove that (and (= c_currentRoundingMode roundNearestTiesToEven) (forall ((v_ULTIMATE.start_main_~a~0_8 (_ FloatingPoint 11 53))) (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode .cse0 v_ULTIMATE.start_main_~a~0_8) .cse0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) (fp.div c_currentRoundingMode v_ULTIMATE.start_main_~a~0_8 ((_ to_fp 11 53) c_currentRoundingMode 2.0))))) (_ bv0 32)))) is different from true [2020-11-29 19:11:22,322 WARN L860 $PredicateComparison]: unable to prove that (and (= c_ULTIMATE.start_main_~x~0 (fp.div c_currentRoundingMode c_ULTIMATE.start_main_~a~0 ((_ to_fp 11 53) c_currentRoundingMode 2.0))) (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0)))) (= c_currentRoundingMode roundNearestTiesToEven) (= (_ bv0 32) c_ULTIMATE.start_main_~r~0)) is different from true [2020-11-29 19:11:26,102 WARN L193 SmtUtils]: Spent 3.75 s on a formula simplification. DAG size of input: 27 DAG size of output: 5 [2020-11-29 19:12:01,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:12:01,263 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2020-11-29 19:12:01,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 19:12:01,333 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 6 [2020-11-29 19:12:01,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:12:01,341 INFO L225 Difference]: With dead ends: 38 [2020-11-29 19:12:01,341 INFO L226 Difference]: Without dead ends: 20 [2020-11-29 19:12:01,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 42.1s TimeCoverageRelationStatistics Valid=24, Invalid=29, Unknown=9, NotChecked=70, Total=132 [2020-11-29 19:12:01,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-29 19:12:01,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2020-11-29 19:12:01,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-29 19:12:01,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-11-29 19:12:01,381 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 6 [2020-11-29 19:12:01,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:12:01,381 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-11-29 19:12:01,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 19:12:01,382 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-11-29 19:12:01,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-29 19:12:01,382 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:12:01,383 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:12:01,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-29 19:12:01,586 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:12:01,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:12:01,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1806863068, now seen corresponding path program 1 times [2020-11-29 19:12:01,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 19:12:01,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1738197954] [2020-11-29 19:12:01,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bb1fca6f-4f8e-4a38-9dc3-2d242df3e6f3/bin/uautomizer/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-11-29 19:12:02,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:12:02,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 19:12:02,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:12:02,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:12:02,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 19:12:02,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:12:02,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1738197954] [2020-11-29 19:12:02,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:12:02,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-11-29 19:12:02,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516387451] [2020-11-29 19:12:02,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 19:12:02,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 19:12:02,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 19:12:02,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:12:02,257 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 6 states. [2020-11-29 19:12:05,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:12:05,068 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2020-11-29 19:12:05,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:12:05,069 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-11-29 19:12:05,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:12:05,070 INFO L225 Difference]: With dead ends: 19 [2020-11-29 19:12:05,070 INFO L226 Difference]: Without dead ends: 15 [2020-11-29 19:12:05,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-11-29 19:12:05,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-29 19:12:05,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-29 19:12:05,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-29 19:12:05,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-11-29 19:12:05,076 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 7 [2020-11-29 19:12:05,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:12:05,076 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-11-29 19:12:05,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 19:12:05,077 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-11-29 19:12:05,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-29 19:12:05,077 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:12:05,077 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:12:05,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-29 19:12:05,278 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:12:05,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:12:05,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1275448533, now seen corresponding path program 1 times [2020-11-29 19:12:05,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 19:12:05,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681932092] [2020-11-29 19:12:05,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bb1fca6f-4f8e-4a38-9dc3-2d242df3e6f3/bin/uautomizer/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-11-29 19:12:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:12:05,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 19:12:05,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:12:07,960 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0)))))) (or (and (not .cse0) (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) (and .cse0 (= (bvadd c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32))))) is different from false [2020-11-29 19:12:10,026 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0)))))) (or (and (not .cse0) (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) (and .cse0 (= (bvadd c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32))))) is different from true [2020-11-29 19:12:10,040 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 19:12:10,040 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:12:12,117 WARN L838 $PredicateComparison]: unable to prove that (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0)))) is different from false [2020-11-29 19:12:14,188 WARN L860 $PredicateComparison]: unable to prove that (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0)))) is different from true [2020-11-29 19:12:14,200 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:12:20,453 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((ULTIMATE.start_main_~a~0 (_ FloatingPoint 11 53)) (ULTIMATE.start_main_~x~0 (_ FloatingPoint 11 53)) (currentRoundingMode RoundingMode) (ULTIMATE.start_main_~r~0 (_ BitVec 32))) (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add currentRoundingMode (fp.sub currentRoundingMode (fp.sub currentRoundingMode ((_ to_fp 11 53) currentRoundingMode (bvmul ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~r~0)) ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) currentRoundingMode ULTIMATE.start_main_~r~0)) (fp.mul currentRoundingMode ((_ to_fp 11 53) currentRoundingMode (_ bv2 32)) ULTIMATE.start_main_~x~0))))) (= (bvadd c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32))) is different from false [2020-11-29 19:12:20,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:12:20,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 19:12:22,572 WARN L838 $PredicateComparison]: unable to prove that (or (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0)))) (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) is different from false [2020-11-29 19:12:24,643 WARN L860 $PredicateComparison]: unable to prove that (or (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0)))) (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) is different from true [2020-11-29 19:12:24,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:12:24,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681932092] [2020-11-29 19:12:24,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:12:24,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2020-11-29 19:12:24,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194486473] [2020-11-29 19:12:24,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 19:12:24,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 19:12:24,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 19:12:24,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=4, Unknown=7, NotChecked=20, Total=42 [2020-11-29 19:12:24,700 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2020-11-29 19:12:28,982 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0))))) (.cse1 (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32)))) (and (or (and (not .cse0) .cse1) (and .cse0 (= (bvadd c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32)))) (or .cse0 .cse1))) is different from false [2020-11-29 19:12:31,094 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) c_ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~r~0)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) c_ULTIMATE.start_main_~x~0))))) (.cse1 (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32)))) (and (or (and (not .cse0) .cse1) (and .cse0 (= (bvadd c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32)))) (or .cse0 .cse1))) is different from true [2020-11-29 19:12:33,189 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((ULTIMATE.start_main_~a~0 (_ FloatingPoint 11 53)) (ULTIMATE.start_main_~x~0 (_ FloatingPoint 11 53)) (currentRoundingMode RoundingMode) (ULTIMATE.start_main_~r~0 (_ BitVec 32))) (= (_ bv0 32) ((_ fp.to_sbv 32) roundTowardZero (fp.add currentRoundingMode (fp.sub currentRoundingMode (fp.sub currentRoundingMode ((_ to_fp 11 53) currentRoundingMode (bvmul ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~r~0)) ULTIMATE.start_main_~a~0) ((_ to_fp 11 53) currentRoundingMode ULTIMATE.start_main_~r~0)) (fp.mul currentRoundingMode ((_ to_fp 11 53) currentRoundingMode (_ bv2 32)) ULTIMATE.start_main_~x~0))))) (not (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) (= (bvadd c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32))) is different from false [2020-11-29 19:12:35,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:12:35,408 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-11-29 19:12:35,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 19:12:35,409 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2020-11-29 19:12:35,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:12:35,411 INFO L225 Difference]: With dead ends: 19 [2020-11-29 19:12:35,411 INFO L226 Difference]: Without dead ends: 15 [2020-11-29 19:12:35,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=15, Invalid=5, Unknown=10, NotChecked=42, Total=72 [2020-11-29 19:12:35,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-29 19:12:35,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-29 19:12:35,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-29 19:12:35,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-11-29 19:12:35,418 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 9 [2020-11-29 19:12:35,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:12:35,418 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-11-29 19:12:35,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 19:12:35,418 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-11-29 19:12:35,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 19:12:35,419 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:12:35,419 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-11-29 19:12:35,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-11-29 19:12:35,635 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:12:35,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:12:35,636 INFO L82 PathProgramCache]: Analyzing trace with hash 885278358, now seen corresponding path program 1 times [2020-11-29 19:12:35,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 19:12:35,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1484181574] [2020-11-29 19:12:35,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bb1fca6f-4f8e-4a38-9dc3-2d242df3e6f3/bin/uautomizer/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-11-29 19:12:43,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:12:43,830 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:12:55,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:12:55,836 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:12:55,939 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-11-29 19:12:55,939 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 19:12:56,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-11-29 19:12:56,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 07:12:56 BoogieIcfgContainer [2020-11-29 19:12:56,174 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 19:12:56,175 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 19:12:56,175 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 19:12:56,176 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 19:12:56,176 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:10:30" (3/4) ... [2020-11-29 19:12:56,179 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 19:12:56,230 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_bb1fca6f-4f8e-4a38-9dc3-2d242df3e6f3/bin/uautomizer/witness.graphml [2020-11-29 19:12:56,231 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 19:12:56,233 INFO L168 Benchmark]: Toolchain (without parser) took 152116.04 ms. Allocated memory was 62.9 MB in the beginning and 81.8 MB in the end (delta: 18.9 MB). Free memory was 44.6 MB in the beginning and 54.0 MB in the end (delta: -9.4 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. [2020-11-29 19:12:56,233 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 62.9 MB. Free memory is still 46.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:12:56,234 INFO L168 Benchmark]: CACSL2BoogieTranslator took 337.71 ms. Allocated memory is still 62.9 MB. Free memory was 44.5 MB in the beginning and 47.6 MB in the end (delta: -3.1 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. [2020-11-29 19:12:56,235 INFO L168 Benchmark]: Boogie Procedure Inliner took 88.07 ms. Allocated memory is still 62.9 MB. Free memory was 47.5 MB in the beginning and 45.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:12:56,236 INFO L168 Benchmark]: Boogie Preprocessor took 72.00 ms. Allocated memory is still 62.9 MB. Free memory was 45.9 MB in the beginning and 44.8 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:12:56,236 INFO L168 Benchmark]: RCFGBuilder took 5559.58 ms. Allocated memory is still 62.9 MB. Free memory was 44.6 MB in the beginning and 32.6 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-29 19:12:56,237 INFO L168 Benchmark]: TraceAbstraction took 145993.44 ms. Allocated memory was 62.9 MB in the beginning and 81.8 MB in the end (delta: 18.9 MB). Free memory was 32.0 MB in the beginning and 56.1 MB in the end (delta: -24.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:12:56,238 INFO L168 Benchmark]: Witness Printer took 55.76 ms. Allocated memory is still 81.8 MB. Free memory was 56.1 MB in the beginning and 54.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-29 19:12:56,242 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 62.9 MB. Free memory is still 46.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 337.71 ms. Allocated memory is still 62.9 MB. Free memory was 44.5 MB in the beginning and 47.6 MB in the end (delta: -3.1 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 88.07 ms. Allocated memory is still 62.9 MB. Free memory was 47.5 MB in the beginning and 45.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 72.00 ms. Allocated memory is still 62.9 MB. Free memory was 45.9 MB in the beginning and 44.8 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 5559.58 ms. Allocated memory is still 62.9 MB. Free memory was 44.6 MB in the beginning and 32.6 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 145993.44 ms. Allocated memory was 62.9 MB in the beginning and 81.8 MB in the end (delta: 18.9 MB). Free memory was 32.0 MB in the beginning and 56.1 MB in the end (delta: -24.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 55.76 ms. Allocated memory is still 81.8 MB. Free memory was 56.1 MB in the beginning and 54.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L24] int counter = 0; VAL [counter=0] [L26] int r; [L27] double a, x; [L28] a = __VERIFIER_nondet_double() [L29] x = a / 2.0 [L30] r = 0 VAL [counter=0] [L32] EXPR counter++ VAL [counter=1] [L32] COND TRUE counter++<2 [L17] COND FALSE !(!(cond)) VAL [counter=1] [L35] COND FALSE !(!(x > r)) [L37] x = x - r [L38] r = r + 1 VAL [counter=1] [L32] EXPR counter++ VAL [counter=2] [L32] COND TRUE counter++<2 [L17] COND TRUE !(cond) VAL [counter=2] [L10] __assert_fail("0", "freire1.c", 10, "reach_error") VAL [counter=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 145.8s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 59.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 38 SDtfs, 17 SDslu, 68 SDs, 0 SdLazy, 17 SolverSat, 3 SolverUnsat, 19 SolverUnknown, 0 SolverNotchecked, 41.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 11 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 63.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 5 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 12.9s SatisfiabilityAnalysisTime, 60.2s InterpolantComputationTime, 32 NumberOfCodeBlocks, 32 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 38 ConstructedInterpolants, 4 QuantifiedInterpolants, 2959 SizeOfPredicates, 18 NumberOfNonLiveVariables, 103 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...