./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/double_req_bl_1252b.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_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a6231fe9945ed231781bef28be0893007c672b08 .......................................................................................................................................................................................................................................................................................................... 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_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a6231fe9945ed231781bef28be0893007c672b08 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 [2020-11-22 13:06:50,018 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:06:50,020 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:06:50,084 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:06:50,085 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:06:50,087 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:06:50,088 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:06:50,101 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:06:50,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:06:50,104 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:06:50,105 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:06:50,107 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:06:50,108 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:06:50,109 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:06:50,111 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:06:50,112 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:06:50,113 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:06:50,114 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:06:50,116 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:06:50,119 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:06:50,121 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:06:50,122 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:06:50,124 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:06:50,125 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:06:50,128 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:06:50,128 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:06:50,129 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:06:50,130 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:06:50,130 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:06:50,132 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:06:50,132 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:06:50,133 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:06:50,134 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:06:50,138 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:06:50,139 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:06:50,140 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:06:50,140 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:06:50,141 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:06:50,141 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:06:50,143 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:06:50,144 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:06:50,146 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 13:06:50,190 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:06:50,191 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:06:50,192 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:06:50,192 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:06:50,193 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:06:50,193 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:06:50,193 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:06:50,193 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:06:50,193 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:06:50,194 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:06:50,195 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:06:50,195 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:06:50,195 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:06:50,195 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:06:50,195 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:06:50,196 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:06:50,197 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:06:50,197 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:06:50,197 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:06:50,197 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:06:50,197 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:06:50,198 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:06:50,198 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:06:50,198 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:06:50,198 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:06:50,198 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:06:50,198 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:06:50,199 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:06:50,199 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:06:50,199 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:06:50,199 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:06:50,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:06:50,200 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:06:50,200 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:06:50,200 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:06:50,200 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:06:50,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:06:50,201 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:06:50,201 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:06:50,201 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:06:50,201 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6231fe9945ed231781bef28be0893007c672b08 [2020-11-22 13:06:50,555 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:06:50,588 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:06:50,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:06:50,594 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:06:50,600 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:06:50,600 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/bin/utaipan/../../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2020-11-22 13:06:50,678 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/bin/utaipan/data/5aea037a1/cc164004d0504bc2a9c305917b04b44b/FLAG6e0f0704a [2020-11-22 13:06:51,202 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:06:51,203 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2020-11-22 13:06:51,217 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/bin/utaipan/data/5aea037a1/cc164004d0504bc2a9c305917b04b44b/FLAG6e0f0704a [2020-11-22 13:06:51,545 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/bin/utaipan/data/5aea037a1/cc164004d0504bc2a9c305917b04b44b [2020-11-22 13:06:51,547 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:06:51,549 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:06:51,563 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:06:51,563 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:06:51,566 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:06:51,566 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:06:51" (1/1) ... [2020-11-22 13:06:51,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d189ecb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:51, skipping insertion in model container [2020-11-22 13:06:51,569 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:06:51" (1/1) ... [2020-11-22 13:06:51,576 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:06:51,591 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:06:51,804 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:06:51,812 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:06:51,837 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:06:51,852 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:06:51,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:51 WrapperNode [2020-11-22 13:06:51,853 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:06:51,854 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:06:51,854 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:06:51,854 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:06:51,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:51" (1/1) ... [2020-11-22 13:06:51,869 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:51" (1/1) ... [2020-11-22 13:06:51,892 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:06:51,893 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:06:51,893 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:06:51,893 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:06:51,902 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:51" (1/1) ... [2020-11-22 13:06:51,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:51" (1/1) ... [2020-11-22 13:06:51,905 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:51" (1/1) ... [2020-11-22 13:06:51,905 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:51" (1/1) ... [2020-11-22 13:06:51,913 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:51" (1/1) ... [2020-11-22 13:06:51,917 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:51" (1/1) ... [2020-11-22 13:06:51,919 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:51" (1/1) ... [2020-11-22 13:06:51,922 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:06:51,923 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:06:51,923 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:06:51,934 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:06:51,937 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:51" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:06:51,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 13:06:51,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:06:51,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-11-22 13:06:51,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:06:51,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:06:51,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-22 13:06:51,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-22 13:06:52,848 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:06:52,848 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-11-22 13:06:52,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:06:52 BoogieIcfgContainer [2020-11-22 13:06:52,850 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:06:52,852 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:06:52,852 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:06:52,855 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:06:52,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:06:51" (1/3) ... [2020-11-22 13:06:52,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@549ec19a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:06:52, skipping insertion in model container [2020-11-22 13:06:52,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:51" (2/3) ... [2020-11-22 13:06:52,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@549ec19a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:06:52, skipping insertion in model container [2020-11-22 13:06:52,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:06:52" (3/3) ... [2020-11-22 13:06:52,858 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1252b.c [2020-11-22 13:06:52,869 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:06:52,873 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-22 13:06:52,885 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-22 13:06:52,907 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:06:52,907 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 13:06:52,908 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:06:52,908 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:06:52,908 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:06:52,908 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:06:52,908 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:06:52,908 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:06:52,934 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-11-22 13:06:52,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-22 13:06:52,939 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:52,940 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:06:52,940 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:06:52,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:52,947 INFO L82 PathProgramCache]: Analyzing trace with hash 709760188, now seen corresponding path program 1 times [2020-11-22 13:06:52,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:52,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166937462] [2020-11-22 13:06:52,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:53,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:53,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166937462] [2020-11-22 13:06:53,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:53,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:06:53,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035275531] [2020-11-22 13:06:53,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-22 13:06:53,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:06:53,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-22 13:06:53,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 13:06:53,096 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-11-22 13:06:53,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:53,112 INFO L93 Difference]: Finished difference Result 35 states and 51 transitions. [2020-11-22 13:06:53,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-22 13:06:53,113 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-11-22 13:06:53,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:53,121 INFO L225 Difference]: With dead ends: 35 [2020-11-22 13:06:53,121 INFO L226 Difference]: Without dead ends: 16 [2020-11-22 13:06:53,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 13:06:53,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-22 13:06:53,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-11-22 13:06:53,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-22 13:06:53,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-11-22 13:06:53,155 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 8 [2020-11-22 13:06:53,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:53,156 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-11-22 13:06:53,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-22 13:06:53,156 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-11-22 13:06:53,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-22 13:06:53,157 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:53,157 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:06:53,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:06:53,157 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:06:53,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:53,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1365755737, now seen corresponding path program 1 times [2020-11-22 13:06:53,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:06:53,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612600819] [2020-11-22 13:06:53,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:06:53,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 13:06:53,205 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 13:06:53,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 13:06:53,249 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 13:06:53,287 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-22 13:06:53,287 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-22 13:06:53,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 13:06:53,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:06:53 BoogieIcfgContainer [2020-11-22 13:06:53,325 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:06:53,327 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:06:53,327 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:06:53,327 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:06:53,327 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:06:52" (3/4) ... [2020-11-22 13:06:53,331 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-22 13:06:53,331 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:06:53,334 INFO L168 Benchmark]: Toolchain (without parser) took 1782.99 ms. Allocated memory is still 111.1 MB. Free memory was 75.9 MB in the beginning and 69.2 MB in the end (delta: 6.7 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:53,335 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 111.1 MB. Free memory was 84.8 MB in the beginning and 84.8 MB in the end (delta: 28.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:06:53,337 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.35 ms. Allocated memory is still 111.1 MB. Free memory was 75.7 MB in the beginning and 86.8 MB in the end (delta: -11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:53,338 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.70 ms. Allocated memory is still 111.1 MB. Free memory was 86.8 MB in the beginning and 84.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:53,339 INFO L168 Benchmark]: Boogie Preprocessor took 29.01 ms. Allocated memory is still 111.1 MB. Free memory was 84.9 MB in the beginning and 83.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:53,340 INFO L168 Benchmark]: RCFGBuilder took 927.53 ms. Allocated memory is still 111.1 MB. Free memory was 83.3 MB in the beginning and 45.0 MB in the end (delta: 38.3 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:53,341 INFO L168 Benchmark]: TraceAbstraction took 473.73 ms. Allocated memory is still 111.1 MB. Free memory was 44.4 MB in the beginning and 69.8 MB in the end (delta: -25.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:06:53,342 INFO L168 Benchmark]: Witness Printer took 4.36 ms. Allocated memory is still 111.1 MB. Free memory was 69.8 MB in the beginning and 69.2 MB in the end (delta: 607.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:06:53,351 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 111.1 MB. Free memory was 84.8 MB in the beginning and 84.8 MB in the end (delta: 28.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 290.35 ms. Allocated memory is still 111.1 MB. Free memory was 75.7 MB in the beginning and 86.8 MB in the end (delta: -11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.70 ms. Allocated memory is still 111.1 MB. Free memory was 86.8 MB in the beginning and 84.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.01 ms. Allocated memory is still 111.1 MB. Free memory was 84.9 MB in the beginning and 83.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 927.53 ms. Allocated memory is still 111.1 MB. Free memory was 83.3 MB in the beginning and 45.0 MB in the end (delta: 38.3 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 473.73 ms. Allocated memory is still 111.1 MB. Free memory was 44.4 MB in the beginning and 69.8 MB in the end (delta: -25.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 4.36 ms. Allocated memory is still 111.1 MB. Free memory was 69.8 MB in the beginning and 69.2 MB in the end (delta: 607.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 86, overapproximation of someUnaryDOUBLEoperation at line 82. Possible FailurePath: [L81] double x = 0.0; [L82] double y = -0.0; [L26] __uint32_t msw, lsw; [L29] ieee_double_shape_type ew_u; [L30] ew_u.value = (x) [L31] EXPR ew_u.parts.msw [L31] (msw) = ew_u.parts.msw [L32] EXPR ew_u.parts.lsw [L32] (lsw) = ew_u.parts.lsw [L35-L36] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L38-L39] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L41-L42] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L45-L46] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L49] return 0; [L54] COND TRUE __fpclassify_double(x) == 0 [L55] return y; [L83] double res = fmax_double(x, y); [L86] EXPR res == 0.0 && __signbit_double(res) == 0 [L86] COND TRUE !(res == 0.0 && __signbit_double(res) == 0) [L3] __assert_fail("0", "double_req_bl_1252b.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 19 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 17 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 49 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 [2020-11-22 13:06:55,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:06:55,749 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:06:55,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:06:55,798 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:06:55,804 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:06:55,807 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:06:55,811 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:06:55,814 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:06:55,822 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:06:55,823 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:06:55,824 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:06:55,825 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:06:55,826 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:06:55,827 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:06:55,828 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:06:55,829 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:06:55,835 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:06:55,841 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:06:55,847 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:06:55,849 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:06:55,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:06:55,856 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:06:55,857 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:06:55,860 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:06:55,861 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:06:55,861 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:06:55,862 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:06:55,863 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:06:55,864 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:06:55,864 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:06:55,865 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:06:55,866 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:06:55,867 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:06:55,868 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:06:55,868 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:06:55,869 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:06:55,869 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:06:55,869 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:06:55,870 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:06:55,870 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:06:55,871 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-11-22 13:06:55,902 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:06:55,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:06:55,903 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:06:55,903 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:06:55,903 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:06:55,903 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:06:55,903 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:06:55,904 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:06:55,904 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:06:55,904 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:06:55,905 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:06:55,905 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:06:55,905 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:06:55,905 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:06:55,905 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:06:55,906 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:06:55,906 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:06:55,906 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-22 13:06:55,906 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-22 13:06:55,906 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:06:55,907 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:06:55,907 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:06:55,907 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:06:55,907 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:06:55,907 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-22 13:06:55,907 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:06:55,908 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:06:55,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:06:55,908 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:06:55,908 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:06:55,908 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:06:55,909 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-11-22 13:06:55,909 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-22 13:06:55,909 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:06:55,909 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:06:55,909 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:06:55,910 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_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6231fe9945ed231781bef28be0893007c672b08 [2020-11-22 13:06:56,305 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:06:56,331 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:06:56,335 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:06:56,336 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:06:56,338 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:06:56,339 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/bin/utaipan/../../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2020-11-22 13:06:56,414 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/bin/utaipan/data/3b0f3c99c/8cba176a09de414ca30e026733ae87ea/FLAG25c678d37 [2020-11-22 13:06:56,888 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:06:56,889 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2020-11-22 13:06:56,898 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/bin/utaipan/data/3b0f3c99c/8cba176a09de414ca30e026733ae87ea/FLAG25c678d37 [2020-11-22 13:06:57,269 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/bin/utaipan/data/3b0f3c99c/8cba176a09de414ca30e026733ae87ea [2020-11-22 13:06:57,271 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:06:57,273 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:06:57,306 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:06:57,306 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:06:57,310 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:06:57,312 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:06:57" (1/1) ... [2020-11-22 13:06:57,314 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b8db7db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:57, skipping insertion in model container [2020-11-22 13:06:57,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:06:57" (1/1) ... [2020-11-22 13:06:57,331 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:06:57,346 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:06:57,502 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:06:57,527 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:06:57,552 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:06:57,571 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:06:57,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:57 WrapperNode [2020-11-22 13:06:57,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:06:57,573 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:06:57,573 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:06:57,573 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:06:57,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:57" (1/1) ... [2020-11-22 13:06:57,590 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:57" (1/1) ... [2020-11-22 13:06:57,621 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:06:57,625 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:06:57,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:06:57,625 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:06:57,633 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:57" (1/1) ... [2020-11-22 13:06:57,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:57" (1/1) ... [2020-11-22 13:06:57,652 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:57" (1/1) ... [2020-11-22 13:06:57,653 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:57" (1/1) ... [2020-11-22 13:06:57,662 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:57" (1/1) ... [2020-11-22 13:06:57,680 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:57" (1/1) ... [2020-11-22 13:06:57,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:57" (1/1) ... [2020-11-22 13:06:57,693 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:06:57,696 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:06:57,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:06:57,698 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:06:57,698 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:06:57,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2020-11-22 13:06:57,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-22 13:06:57,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:06:57,770 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-11-22 13:06:57,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:06:57,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:06:57,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-22 13:06:58,487 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:06:58,487 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-11-22 13:06:58,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:06:58 BoogieIcfgContainer [2020-11-22 13:06:58,489 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:06:58,490 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:06:58,490 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:06:58,493 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:06:58,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:06:57" (1/3) ... [2020-11-22 13:06:58,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4353d862 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:06:58, skipping insertion in model container [2020-11-22 13:06:58,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:06:57" (2/3) ... [2020-11-22 13:06:58,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4353d862 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:06:58, skipping insertion in model container [2020-11-22 13:06:58,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:06:58" (3/3) ... [2020-11-22 13:06:58,501 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1252b.c [2020-11-22 13:06:58,512 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:06:58,516 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-22 13:06:58,528 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-22 13:06:58,559 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:06:58,559 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 13:06:58,559 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:06:58,559 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:06:58,560 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:06:58,560 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:06:58,560 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:06:58,560 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:06:58,571 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-11-22 13:06:58,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-22 13:06:58,576 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:58,577 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:06:58,577 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:06:58,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:58,583 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-11-22 13:06:58,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-22 13:06:58,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1496028939] [2020-11-22 13:06:58,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-11-22 13:06:58,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:58,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-22 13:06:58,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:06:58,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:58,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:06:58,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:58,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1496028939] [2020-11-22 13:06:58,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:58,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-22 13:06:58,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236621349] [2020-11-22 13:06:58,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-22 13:06:58,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-22 13:06:58,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-22 13:06:58,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 13:06:58,747 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-11-22 13:06:58,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:58,764 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-11-22 13:06:58,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-22 13:06:58,765 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-11-22 13:06:58,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:58,774 INFO L225 Difference]: With dead ends: 63 [2020-11-22 13:06:58,774 INFO L226 Difference]: Without dead ends: 29 [2020-11-22 13:06:58,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 13:06:58,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-22 13:06:58,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-11-22 13:06:58,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-22 13:06:58,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-11-22 13:06:58,809 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-11-22 13:06:58,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:58,810 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-11-22 13:06:58,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-22 13:06:58,810 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-11-22 13:06:58,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-22 13:06:58,811 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:58,811 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:06:59,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-22 13:06:59,032 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:06:59,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:59,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-11-22 13:06:59,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-22 13:06:59,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2056815387] [2020-11-22 13:06:59,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-11-22 13:06:59,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:59,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-22 13:06:59,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:06:59,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:59,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:06:59,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:59,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2056815387] [2020-11-22 13:06:59,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:59,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-22 13:06:59,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453568877] [2020-11-22 13:06:59,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 13:06:59,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-22 13:06:59,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 13:06:59,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-22 13:06:59,205 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 6 states. [2020-11-22 13:06:59,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:06:59,348 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2020-11-22 13:06:59,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 13:06:59,350 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-11-22 13:06:59,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:06:59,352 INFO L225 Difference]: With dead ends: 68 [2020-11-22 13:06:59,354 INFO L226 Difference]: Without dead ends: 59 [2020-11-22 13:06:59,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-22 13:06:59,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-22 13:06:59,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2020-11-22 13:06:59,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-22 13:06:59,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-11-22 13:06:59,368 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-11-22 13:06:59,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:06:59,371 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-11-22 13:06:59,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 13:06:59,371 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-11-22 13:06:59,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-22 13:06:59,373 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:06:59,374 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:06:59,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-22 13:06:59,586 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:06:59,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:06:59,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2020-11-22 13:06:59,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-22 13:06:59,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1202844159] [2020-11-22 13:06:59,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-11-22 13:06:59,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:06:59,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-22 13:06:59,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:06:59,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:59,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:06:59,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:06:59,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1202844159] [2020-11-22 13:06:59,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:06:59,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-22 13:06:59,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741693553] [2020-11-22 13:06:59,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 13:06:59,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-22 13:06:59,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 13:06:59,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-22 13:06:59,974 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 6 states. [2020-11-22 13:07:00,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:00,153 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-11-22 13:07:00,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:07:00,156 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-11-22 13:07:00,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:00,157 INFO L225 Difference]: With dead ends: 52 [2020-11-22 13:07:00,157 INFO L226 Difference]: Without dead ends: 28 [2020-11-22 13:07:00,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-22 13:07:00,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-22 13:07:00,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-11-22 13:07:00,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-22 13:07:00,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-11-22 13:07:00,161 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 14 [2020-11-22 13:07:00,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:00,161 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-11-22 13:07:00,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 13:07:00,161 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-11-22 13:07:00,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-22 13:07:00,161 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:00,161 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:07:00,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-11-22 13:07:00,362 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:07:00,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:00,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2020-11-22 13:07:00,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-22 13:07:00,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [537914816] [2020-11-22 13:07:00,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/bin/utaipan/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 [2020-11-22 13:07:00,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:00,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-22 13:07:00,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:07:00,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:00,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:07:00,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:00,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [537914816] [2020-11-22 13:07:00,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:07:00,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-22 13:07:00,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589292661] [2020-11-22 13:07:00,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 13:07:00,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-22 13:07:00,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 13:07:00,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-22 13:07:00,543 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 6 states. [2020-11-22 13:07:00,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:00,694 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2020-11-22 13:07:00,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 13:07:00,695 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-11-22 13:07:00,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:00,696 INFO L225 Difference]: With dead ends: 65 [2020-11-22 13:07:00,696 INFO L226 Difference]: Without dead ends: 56 [2020-11-22 13:07:00,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-22 13:07:00,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-22 13:07:00,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 30. [2020-11-22 13:07:00,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-22 13:07:00,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-11-22 13:07:00,703 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 16 [2020-11-22 13:07:00,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:00,703 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-11-22 13:07:00,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 13:07:00,704 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-11-22 13:07:00,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-22 13:07:00,704 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:00,705 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:07:00,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-11-22 13:07:00,911 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:07:00,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:00,911 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2020-11-22 13:07:00,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-22 13:07:00,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [865594470] [2020-11-22 13:07:00,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/bin/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-11-22 13:07:01,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:01,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-22 13:07:01,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:07:01,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:01,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:07:01,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:01,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [865594470] [2020-11-22 13:07:01,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:07:01,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-22 13:07:01,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598669076] [2020-11-22 13:07:01,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:07:01,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-22 13:07:01,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:07:01,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:07:01,109 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 4 states. [2020-11-22 13:07:01,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:01,130 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2020-11-22 13:07:01,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:07:01,132 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-11-22 13:07:01,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:01,132 INFO L225 Difference]: With dead ends: 40 [2020-11-22 13:07:01,133 INFO L226 Difference]: Without dead ends: 30 [2020-11-22 13:07:01,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:07:01,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-22 13:07:01,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-11-22 13:07:01,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-22 13:07:01,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-11-22 13:07:01,138 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 18 [2020-11-22 13:07:01,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:01,138 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-11-22 13:07:01,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:07:01,138 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-11-22 13:07:01,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-22 13:07:01,139 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:01,139 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:07:01,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-11-22 13:07:01,347 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:07:01,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:01,348 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2020-11-22 13:07:01,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-22 13:07:01,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551056379] [2020-11-22 13:07:01,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/bin/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-11-22 13:07:01,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:01,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-22 13:07:01,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:07:01,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:01,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:07:01,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:01,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551056379] [2020-11-22 13:07:01,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:07:01,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2020-11-22 13:07:01,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106590817] [2020-11-22 13:07:01,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-22 13:07:01,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-22 13:07:01,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-22 13:07:01,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-11-22 13:07:01,616 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 9 states. [2020-11-22 13:07:01,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:01,772 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-11-22 13:07:01,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-22 13:07:01,774 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-11-22 13:07:01,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:01,774 INFO L225 Difference]: With dead ends: 42 [2020-11-22 13:07:01,775 INFO L226 Difference]: Without dead ends: 39 [2020-11-22 13:07:01,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-11-22 13:07:01,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-22 13:07:01,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2020-11-22 13:07:01,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-22 13:07:01,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-11-22 13:07:01,780 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 18 [2020-11-22 13:07:01,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:01,780 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-11-22 13:07:01,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-22 13:07:01,780 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-11-22 13:07:01,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-22 13:07:01,781 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:01,781 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:07:01,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-11-22 13:07:01,982 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:07:01,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:01,982 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2020-11-22 13:07:01,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-22 13:07:01,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [320443576] [2020-11-22 13:07:01,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/bin/utaipan/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-11-22 13:07:02,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:02,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-22 13:07:02,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:07:02,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:02,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:07:02,178 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 13:07:02,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:02,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [320443576] [2020-11-22 13:07:02,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:07:02,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2020-11-22 13:07:02,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200537922] [2020-11-22 13:07:02,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-22 13:07:02,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-22 13:07:02,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-22 13:07:02,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-22 13:07:02,326 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 8 states. [2020-11-22 13:07:02,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:02,489 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-11-22 13:07:02,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:07:02,493 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-11-22 13:07:02,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:02,494 INFO L225 Difference]: With dead ends: 45 [2020-11-22 13:07:02,494 INFO L226 Difference]: Without dead ends: 27 [2020-11-22 13:07:02,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-11-22 13:07:02,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-22 13:07:02,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-22 13:07:02,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-22 13:07:02,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-11-22 13:07:02,502 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 19 [2020-11-22 13:07:02,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:02,503 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-11-22 13:07:02,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-22 13:07:02,504 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-11-22 13:07:02,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-22 13:07:02,504 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:02,504 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:07:02,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-11-22 13:07:02,705 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:07:02,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:02,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2020-11-22 13:07:02,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-22 13:07:02,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [576099762] [2020-11-22 13:07:02,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/bin/utaipan/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-11-22 13:07:02,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 13:07:02,961 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 13:07:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 13:07:03,207 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 13:07:03,279 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-11-22 13:07:03,279 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-22 13:07:03,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-11-22 13:07:03,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:07:03 BoogieIcfgContainer [2020-11-22 13:07:03,523 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:07:03,524 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:07:03,524 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:07:03,524 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:07:03,525 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:06:58" (3/4) ... [2020-11-22 13:07:03,527 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-22 13:07:03,585 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_f8bde0ad-a681-4632-84e7-bfd07ba0d18f/bin/utaipan/witness.graphml [2020-11-22 13:07:03,585 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:07:03,587 INFO L168 Benchmark]: Toolchain (without parser) took 6313.26 ms. Allocated memory was 69.2 MB in the beginning and 90.2 MB in the end (delta: 21.0 MB). Free memory was 35.2 MB in the beginning and 69.5 MB in the end (delta: -34.3 MB). Peak memory consumption was 26.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:07:03,587 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 69.2 MB. Free memory is still 51.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:07:03,588 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.06 ms. Allocated memory is still 69.2 MB. Free memory was 54.1 MB in the beginning and 43.1 MB in the end (delta: 11.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-22 13:07:03,588 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.94 ms. Allocated memory is still 69.2 MB. Free memory was 42.9 MB in the beginning and 41.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:07:03,589 INFO L168 Benchmark]: Boogie Preprocessor took 70.81 ms. Allocated memory is still 69.2 MB. Free memory was 41.1 MB in the beginning and 39.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:07:03,590 INFO L168 Benchmark]: RCFGBuilder took 792.41 ms. Allocated memory is still 69.2 MB. Free memory was 39.4 MB in the beginning and 40.9 MB in the end (delta: -1.5 MB). Peak memory consumption was 14.6 MB. Max. memory is 16.1 GB. [2020-11-22 13:07:03,590 INFO L168 Benchmark]: TraceAbstraction took 5033.26 ms. Allocated memory was 69.2 MB in the beginning and 90.2 MB in the end (delta: 21.0 MB). Free memory was 40.6 MB in the beginning and 34.2 MB in the end (delta: 6.4 MB). Peak memory consumption was 26.6 MB. Max. memory is 16.1 GB. [2020-11-22 13:07:03,591 INFO L168 Benchmark]: Witness Printer took 60.99 ms. Allocated memory is still 90.2 MB. Free memory was 34.2 MB in the beginning and 69.5 MB in the end (delta: -35.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:07:03,594 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 69.2 MB. Free memory is still 51.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 266.06 ms. Allocated memory is still 69.2 MB. Free memory was 54.1 MB in the beginning and 43.1 MB in the end (delta: 11.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 50.94 ms. Allocated memory is still 69.2 MB. Free memory was 42.9 MB in the beginning and 41.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 70.81 ms. Allocated memory is still 69.2 MB. Free memory was 41.1 MB in the beginning and 39.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 792.41 ms. Allocated memory is still 69.2 MB. Free memory was 39.4 MB in the beginning and 40.9 MB in the end (delta: -1.5 MB). Peak memory consumption was 14.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5033.26 ms. Allocated memory was 69.2 MB in the beginning and 90.2 MB in the end (delta: 21.0 MB). Free memory was 40.6 MB in the beginning and 34.2 MB in the end (delta: 6.4 MB). Peak memory consumption was 26.6 MB. Max. memory is 16.1 GB. * Witness Printer took 60.99 ms. Allocated memory is still 90.2 MB. Free memory was 34.2 MB in the beginning and 69.5 MB in the end (delta: -35.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L81] double x = 0.0; [L82] double y = -0.0; [L26] __uint32_t msw, lsw; [L29] ieee_double_shape_type ew_u; [L30] ew_u.value = (x) [L31] EXPR ew_u.parts.msw [L31] (msw) = ew_u.parts.msw [L32] EXPR ew_u.parts.lsw [L32] (lsw) = ew_u.parts.lsw [L35-L36] COND TRUE (msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000) [L37] return 2; [L54] COND FALSE !(__fpclassify_double(x) == 0) [L26] __uint32_t msw, lsw; [L29] ieee_double_shape_type ew_u; [L30] ew_u.value = (x) [L31] EXPR ew_u.parts.msw [L31] (msw) = ew_u.parts.msw [L32] EXPR ew_u.parts.lsw [L32] (lsw) = ew_u.parts.lsw [L35-L36] COND TRUE (msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000) [L37] return 2; [L56] COND FALSE !(__fpclassify_double(y) == 0) [L59] EXPR x > y ? x : y [L59] return x > y ? x : y; [L83] double res = fmax_double(x, y); [L86] EXPR res == 0.0 && __signbit_double(res) == 0 [L63] __uint32_t msw; [L66] ieee_double_shape_type gh_u; [L67] gh_u.value = (x) [L68] EXPR gh_u.parts.msw [L68] (msw) = gh_u.parts.msw [L71] return (msw & 0x80000000) != 0; [L86] EXPR res == 0.0 && __signbit_double(res) == 0 [L86] COND TRUE !(res == 0.0 && __signbit_double(res) == 0) [L3] __assert_fail("0", "double_req_bl_1252b.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.9s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 234 SDtfs, 257 SDslu, 359 SDs, 0 SdLazy, 130 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 209 GetRequests, 168 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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, 7 MinimizatonAttempts, 61 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 198 ConstructedInterpolants, 15 QuantifiedInterpolants, 12524 SizeOfPredicates, 27 NumberOfNonLiveVariables, 463 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 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...