./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 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a6231fe9945ed231781bef28be0893007c672b08 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 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 0.2.0-7b2dab5 [2021-10-11 00:23:21,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 00:23:21,267 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 00:23:21,311 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 00:23:21,312 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 00:23:21,313 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 00:23:21,315 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 00:23:21,317 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 00:23:21,319 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 00:23:21,321 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 00:23:21,322 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 00:23:21,323 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 00:23:21,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 00:23:21,325 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 00:23:21,326 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 00:23:21,328 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 00:23:21,329 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 00:23:21,330 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 00:23:21,333 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 00:23:21,335 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 00:23:21,337 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 00:23:21,339 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 00:23:21,340 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 00:23:21,341 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 00:23:21,345 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 00:23:21,345 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 00:23:21,346 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 00:23:21,347 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 00:23:21,347 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 00:23:21,349 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 00:23:21,349 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 00:23:21,350 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 00:23:21,351 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 00:23:21,352 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 00:23:21,353 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 00:23:21,353 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 00:23:21,354 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 00:23:21,355 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 00:23:21,355 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 00:23:21,356 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 00:23:21,357 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 00:23:21,357 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-11 00:23:21,388 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 00:23:21,389 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 00:23:21,391 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 00:23:21,391 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 00:23:21,391 INFO L138 SettingsManager]: * Use SBE=true [2021-10-11 00:23:21,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 00:23:21,391 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 00:23:21,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 00:23:21,392 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 00:23:21,398 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 00:23:21,399 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 00:23:21,399 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 00:23:21,399 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 00:23:21,399 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 00:23:21,399 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 00:23:21,400 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 00:23:21,400 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 00:23:21,400 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 00:23:21,400 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 00:23:21,400 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 00:23:21,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:23:21,401 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 00:23:21,401 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 00:23:21,401 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 00:23:21,401 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-11 00:23:21,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 00:23:21,402 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 00:23:21,402 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 00:23:21,402 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6231fe9945ed231781bef28be0893007c672b08 [2021-10-11 00:23:21,664 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 00:23:21,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 00:23:21,686 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 00:23:21,688 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 00:23:21,693 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 00:23:21,694 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC/../../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2021-10-11 00:23:21,770 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC/data/3b0111a0a/325a639bda62459499c26c9f0a0a623b/FLAG79d4f9d02 [2021-10-11 00:23:22,174 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 00:23:22,175 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2021-10-11 00:23:22,182 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC/data/3b0111a0a/325a639bda62459499c26c9f0a0a623b/FLAG79d4f9d02 [2021-10-11 00:23:22,584 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC/data/3b0111a0a/325a639bda62459499c26c9f0a0a623b [2021-10-11 00:23:22,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 00:23:22,588 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 00:23:22,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 00:23:22,590 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 00:23:22,593 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 00:23:22,594 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:23:22" (1/1) ... [2021-10-11 00:23:22,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31794f91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:22, skipping insertion in model container [2021-10-11 00:23:22,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:23:22" (1/1) ... [2021-10-11 00:23:22,603 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 00:23:22,618 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 00:23:22,823 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c[2154,2167] [2021-10-11 00:23:22,826 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:23:22,837 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 00:23:22,865 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c[2154,2167] [2021-10-11 00:23:22,866 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:23:22,877 INFO L208 MainTranslator]: Completed translation [2021-10-11 00:23:22,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:22 WrapperNode [2021-10-11 00:23:22,878 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 00:23:22,879 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 00:23:22,879 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 00:23:22,879 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 00:23:22,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:22" (1/1) ... [2021-10-11 00:23:22,893 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:22" (1/1) ... [2021-10-11 00:23:22,915 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 00:23:22,916 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 00:23:22,917 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 00:23:22,917 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 00:23:22,922 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:22" (1/1) ... [2021-10-11 00:23:22,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:22" (1/1) ... [2021-10-11 00:23:22,926 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:22" (1/1) ... [2021-10-11 00:23:22,926 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:22" (1/1) ... [2021-10-11 00:23:22,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:22" (1/1) ... [2021-10-11 00:23:22,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:22" (1/1) ... [2021-10-11 00:23:22,941 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:22" (1/1) ... [2021-10-11 00:23:22,944 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 00:23:22,945 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 00:23:22,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 00:23:22,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 00:23:22,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:22" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:23:23,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 00:23:23,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 00:23:23,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-10-11 00:23:23,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 00:23:23,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 00:23:23,023 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 00:23:23,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 00:23:23,313 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 00:23:23,314 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-11 00:23:23,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:23:23 BoogieIcfgContainer [2021-10-11 00:23:23,315 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 00:23:23,317 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 00:23:23,317 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 00:23:23,320 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 00:23:23,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 12:23:22" (1/3) ... [2021-10-11 00:23:23,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bffd549 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:23:23, skipping insertion in model container [2021-10-11 00:23:23,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:22" (2/3) ... [2021-10-11 00:23:23,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bffd549 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:23:23, skipping insertion in model container [2021-10-11 00:23:23,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:23:23" (3/3) ... [2021-10-11 00:23:23,324 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1252b.c [2021-10-11 00:23:23,336 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 00:23:23,339 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 00:23:23,350 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 00:23:23,372 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 00:23:23,373 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 00:23:23,373 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 00:23:23,373 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 00:23:23,373 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 00:23:23,373 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 00:23:23,374 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 00:23:23,374 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 00:23:23,386 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2021-10-11 00:23:23,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 00:23:23,391 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:23,392 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:23:23,392 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:23,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:23,398 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2021-10-11 00:23:23,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:23:23,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076336401] [2021-10-11 00:23:23,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:23:23,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:23,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:23:23,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076336401] [2021-10-11 00:23:23,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:23:23,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 00:23:23,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838208401] [2021-10-11 00:23:23,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 00:23:23,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:23:23,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 00:23:23,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 00:23:23,671 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2021-10-11 00:23:23,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:23:23,685 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2021-10-11 00:23:23,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 00:23:23,686 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2021-10-11 00:23:23,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:23:23,694 INFO L225 Difference]: With dead ends: 62 [2021-10-11 00:23:23,694 INFO L226 Difference]: Without dead ends: 29 [2021-10-11 00:23:23,698 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 [2021-10-11 00:23:23,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-11 00:23:23,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-11 00:23:23,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-10-11 00:23:23,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-10-11 00:23:23,725 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2021-10-11 00:23:23,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:23:23,726 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-10-11 00:23:23,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 00:23:23,726 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-10-11 00:23:23,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 00:23:23,727 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:23,727 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:23:23,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 00:23:23,727 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:23,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:23,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2021-10-11 00:23:23,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:23:23,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977207840] [2021-10-11 00:23:23,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:23:23,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:23,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:23:23,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977207840] [2021-10-11 00:23:23,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:23:23,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 00:23:23,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756503990] [2021-10-11 00:23:23,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 00:23:23,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:23:23,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 00:23:23,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 00:23:23,817 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2021-10-11 00:23:23,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:23:23,879 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2021-10-11 00:23:23,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:23:23,891 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2021-10-11 00:23:23,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:23:23,892 INFO L225 Difference]: With dead ends: 53 [2021-10-11 00:23:23,893 INFO L226 Difference]: Without dead ends: 44 [2021-10-11 00:23:23,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:23:23,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-11 00:23:23,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2021-10-11 00:23:23,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-11 00:23:23,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-10-11 00:23:23,900 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2021-10-11 00:23:23,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:23:23,901 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-10-11 00:23:23,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 00:23:23,901 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-10-11 00:23:23,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 00:23:23,902 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:23,902 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:23:23,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 00:23:23,902 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:23,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:23,903 INFO L82 PathProgramCache]: Analyzing trace with hash 502201410, now seen corresponding path program 1 times [2021-10-11 00:23:23,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:23:23,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510337583] [2021-10-11 00:23:23,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:23:23,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:23,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:23:23,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510337583] [2021-10-11 00:23:23,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:23:23,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 00:23:23,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175145913] [2021-10-11 00:23:23,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 00:23:23,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:23:23,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 00:23:23,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 00:23:23,977 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2021-10-11 00:23:24,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:23:24,056 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2021-10-11 00:23:24,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:23:24,059 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2021-10-11 00:23:24,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:23:24,060 INFO L225 Difference]: With dead ends: 55 [2021-10-11 00:23:24,060 INFO L226 Difference]: Without dead ends: 46 [2021-10-11 00:23:24,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:23:24,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-11 00:23:24,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2021-10-11 00:23:24,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-11 00:23:24,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-10-11 00:23:24,067 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 12 [2021-10-11 00:23:24,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:23:24,067 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-10-11 00:23:24,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 00:23:24,067 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-10-11 00:23:24,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-11 00:23:24,068 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:24,068 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:23:24,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 00:23:24,071 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:24,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:24,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1951233721, now seen corresponding path program 1 times [2021-10-11 00:23:24,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:23:24,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554391595] [2021-10-11 00:23:24,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:23:24,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:24,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:23:24,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554391595] [2021-10-11 00:23:24,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:23:24,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 00:23:24,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563285692] [2021-10-11 00:23:24,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 00:23:24,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:23:24,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 00:23:24,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 00:23:24,178 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2021-10-11 00:23:24,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:23:24,222 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2021-10-11 00:23:24,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:23:24,222 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2021-10-11 00:23:24,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:23:24,223 INFO L225 Difference]: With dead ends: 57 [2021-10-11 00:23:24,224 INFO L226 Difference]: Without dead ends: 48 [2021-10-11 00:23:24,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:23:24,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-11 00:23:24,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2021-10-11 00:23:24,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-11 00:23:24,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-10-11 00:23:24,230 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 13 [2021-10-11 00:23:24,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:23:24,230 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-10-11 00:23:24,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 00:23:24,231 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-10-11 00:23:24,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-11 00:23:24,231 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:24,232 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:23:24,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-11 00:23:24,232 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:24,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:24,233 INFO L82 PathProgramCache]: Analyzing trace with hash -555760345, now seen corresponding path program 1 times [2021-10-11 00:23:24,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:23:24,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645815368] [2021-10-11 00:23:24,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:23:24,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:24,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:23:24,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645815368] [2021-10-11 00:23:24,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:23:24,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 00:23:24,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238134231] [2021-10-11 00:23:24,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 00:23:24,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:23:24,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 00:23:24,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 00:23:24,297 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2021-10-11 00:23:24,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:23:24,362 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2021-10-11 00:23:24,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:23:24,362 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2021-10-11 00:23:24,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:23:24,366 INFO L225 Difference]: With dead ends: 55 [2021-10-11 00:23:24,366 INFO L226 Difference]: Without dead ends: 46 [2021-10-11 00:23:24,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:23:24,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-11 00:23:24,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2021-10-11 00:23:24,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-11 00:23:24,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-10-11 00:23:24,371 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 14 [2021-10-11 00:23:24,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:23:24,372 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-10-11 00:23:24,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 00:23:24,372 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-10-11 00:23:24,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-11 00:23:24,372 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:24,373 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:23:24,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-11 00:23:24,373 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:24,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:24,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2021-10-11 00:23:24,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:23:24,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561905282] [2021-10-11 00:23:24,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:23:24,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:23:24,412 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:23:24,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:23:24,444 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:23:24,471 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-11 00:23:24,472 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 00:23:24,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-11 00:23:24,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 12:23:24 BoogieIcfgContainer [2021-10-11 00:23:24,503 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 00:23:24,504 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 00:23:24,504 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 00:23:24,504 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 00:23:24,505 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:23:23" (3/4) ... [2021-10-11 00:23:24,508 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-11 00:23:24,508 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 00:23:24,510 INFO L168 Benchmark]: Toolchain (without parser) took 1920.78 ms. Allocated memory is still 117.4 MB. Free memory was 83.5 MB in the beginning and 80.6 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.3 MB. Max. memory is 16.1 GB. [2021-10-11 00:23:24,510 INFO L168 Benchmark]: CDTParser took 0.73 ms. Allocated memory is still 73.4 MB. Free memory was 49.9 MB in the beginning and 49.9 MB in the end (delta: 25.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:23:24,511 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.76 ms. Allocated memory is still 117.4 MB. Free memory was 83.3 MB in the beginning and 93.5 MB in the end (delta: -10.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 00:23:24,512 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.90 ms. Allocated memory is still 117.4 MB. Free memory was 93.1 MB in the beginning and 91.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:23:24,513 INFO L168 Benchmark]: Boogie Preprocessor took 28.18 ms. Allocated memory is still 117.4 MB. Free memory was 91.4 MB in the beginning and 90.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:23:24,513 INFO L168 Benchmark]: RCFGBuilder took 370.27 ms. Allocated memory is still 117.4 MB. Free memory was 90.2 MB in the beginning and 70.1 MB in the end (delta: 20.1 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-11 00:23:24,514 INFO L168 Benchmark]: TraceAbstraction took 1186.37 ms. Allocated memory is still 117.4 MB. Free memory was 69.7 MB in the beginning and 81.5 MB in the end (delta: -11.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:23:24,515 INFO L168 Benchmark]: Witness Printer took 4.01 ms. Allocated memory is still 117.4 MB. Free memory was 81.5 MB in the beginning and 80.6 MB in the end (delta: 908.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:23:24,519 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.73 ms. Allocated memory is still 73.4 MB. Free memory was 49.9 MB in the beginning and 49.9 MB in the end (delta: 25.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 288.76 ms. Allocated memory is still 117.4 MB. Free memory was 83.3 MB in the beginning and 93.5 MB in the end (delta: -10.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.90 ms. Allocated memory is still 117.4 MB. Free memory was 93.1 MB in the beginning and 91.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.18 ms. Allocated memory is still 117.4 MB. Free memory was 91.4 MB in the beginning and 90.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 370.27 ms. Allocated memory is still 117.4 MB. Free memory was 90.2 MB in the beginning and 70.1 MB in the end (delta: 20.1 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1186.37 ms. Allocated memory is still 117.4 MB. Free memory was 69.7 MB in the beginning and 81.5 MB in the end (delta: -11.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 4.01 ms. Allocated memory is still 117.4 MB. Free memory was 81.5 MB in the beginning and 80.6 MB in the end (delta: 908.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 87]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is 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) [L87] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.1s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 251 SDtfs, 64 SDslu, 298 SDs, 0 SdLazy, 84 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred 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, 5 MinimizatonAttempts, 60 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 799 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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 0.2.0-7b2dab5 [2021-10-11 00:23:26,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 00:23:26,874 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 00:23:26,918 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 00:23:26,918 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 00:23:26,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 00:23:26,926 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 00:23:26,932 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 00:23:26,935 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 00:23:26,940 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 00:23:26,942 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 00:23:26,943 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 00:23:26,943 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 00:23:26,946 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 00:23:26,947 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 00:23:26,949 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 00:23:26,951 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 00:23:26,954 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 00:23:26,956 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 00:23:26,963 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 00:23:26,965 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 00:23:26,967 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 00:23:26,970 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 00:23:26,971 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 00:23:26,979 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 00:23:26,980 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 00:23:26,980 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 00:23:26,982 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 00:23:26,983 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 00:23:26,984 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 00:23:26,984 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 00:23:26,985 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 00:23:26,987 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 00:23:26,988 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 00:23:26,989 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 00:23:26,989 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 00:23:26,990 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 00:23:26,990 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 00:23:26,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 00:23:26,992 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 00:23:26,993 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 00:23:26,994 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-10-11 00:23:27,031 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 00:23:27,031 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 00:23:27,034 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 00:23:27,034 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 00:23:27,034 INFO L138 SettingsManager]: * Use SBE=true [2021-10-11 00:23:27,035 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 00:23:27,035 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 00:23:27,035 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 00:23:27,036 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 00:23:27,036 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 00:23:27,037 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 00:23:27,037 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 00:23:27,038 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-11 00:23:27,038 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-11 00:23:27,038 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 00:23:27,039 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 00:23:27,039 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 00:23:27,039 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 00:23:27,040 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 00:23:27,040 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 00:23:27,040 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 00:23:27,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:23:27,041 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 00:23:27,041 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 00:23:27,042 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 00:23:27,042 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-11 00:23:27,042 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-11 00:23:27,042 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 00:23:27,043 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 00:23:27,043 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 00:23:27,044 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_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6231fe9945ed231781bef28be0893007c672b08 [2021-10-11 00:23:27,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 00:23:27,443 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 00:23:27,446 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 00:23:27,450 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 00:23:27,451 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 00:23:27,452 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC/../../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2021-10-11 00:23:27,526 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC/data/5a6801408/1050c22254ef455eb389729b8f7add4c/FLAG7c9955850 [2021-10-11 00:23:28,019 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 00:23:28,020 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2021-10-11 00:23:28,037 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC/data/5a6801408/1050c22254ef455eb389729b8f7add4c/FLAG7c9955850 [2021-10-11 00:23:28,405 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC/data/5a6801408/1050c22254ef455eb389729b8f7add4c [2021-10-11 00:23:28,407 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 00:23:28,410 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 00:23:28,414 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 00:23:28,414 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 00:23:28,417 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 00:23:28,419 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:23:28" (1/1) ... [2021-10-11 00:23:28,427 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a9e72f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:28, skipping insertion in model container [2021-10-11 00:23:28,427 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:23:28" (1/1) ... [2021-10-11 00:23:28,434 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 00:23:28,453 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 00:23:28,654 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c[2154,2167] [2021-10-11 00:23:28,657 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:23:28,704 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 00:23:28,749 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c[2154,2167] [2021-10-11 00:23:28,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:23:28,777 INFO L208 MainTranslator]: Completed translation [2021-10-11 00:23:28,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:28 WrapperNode [2021-10-11 00:23:28,778 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 00:23:28,779 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 00:23:28,779 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 00:23:28,779 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 00:23:28,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:28" (1/1) ... [2021-10-11 00:23:28,810 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:28" (1/1) ... [2021-10-11 00:23:28,831 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 00:23:28,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 00:23:28,833 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 00:23:28,833 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 00:23:28,841 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:28" (1/1) ... [2021-10-11 00:23:28,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:28" (1/1) ... [2021-10-11 00:23:28,846 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:28" (1/1) ... [2021-10-11 00:23:28,846 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:28" (1/1) ... [2021-10-11 00:23:28,855 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:28" (1/1) ... [2021-10-11 00:23:28,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:28" (1/1) ... [2021-10-11 00:23:28,863 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:28" (1/1) ... [2021-10-11 00:23:28,866 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 00:23:28,867 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 00:23:28,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 00:23:28,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 00:23:28,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:28" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:23:28,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2021-10-11 00:23:28,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-11 00:23:28,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 00:23:28,967 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-11 00:23:28,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 00:23:28,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 00:23:28,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 00:23:29,297 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 00:23:29,297 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-11 00:23:29,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:23:29 BoogieIcfgContainer [2021-10-11 00:23:29,298 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 00:23:29,300 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 00:23:29,300 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 00:23:29,303 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 00:23:29,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 12:23:28" (1/3) ... [2021-10-11 00:23:29,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e9a4d6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:23:29, skipping insertion in model container [2021-10-11 00:23:29,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:28" (2/3) ... [2021-10-11 00:23:29,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e9a4d6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:23:29, skipping insertion in model container [2021-10-11 00:23:29,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:23:29" (3/3) ... [2021-10-11 00:23:29,305 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1252b.c [2021-10-11 00:23:29,318 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 00:23:29,321 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 00:23:29,331 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 00:23:29,353 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 00:23:29,353 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 00:23:29,353 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 00:23:29,353 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 00:23:29,354 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 00:23:29,354 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 00:23:29,354 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 00:23:29,354 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 00:23:29,366 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2021-10-11 00:23:29,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 00:23:29,371 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:29,372 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:23:29,372 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:29,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:29,378 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2021-10-11 00:23:29,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-11 00:23:29,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1691386744] [2021-10-11 00:23:29,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:23:29,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:29,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-11 00:23:29,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:23:29,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:23:29,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 00:23:29,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1691386744] [2021-10-11 00:23:29,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:23:29,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 00:23:29,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396483780] [2021-10-11 00:23:29,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 00:23:29,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-11 00:23:29,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 00:23:29,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 00:23:29,564 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2021-10-11 00:23:29,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:23:29,581 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2021-10-11 00:23:29,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 00:23:29,583 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2021-10-11 00:23:29,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:23:29,591 INFO L225 Difference]: With dead ends: 62 [2021-10-11 00:23:29,591 INFO L226 Difference]: Without dead ends: 29 [2021-10-11 00:23:29,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 00:23:29,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-11 00:23:29,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-11 00:23:29,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-10-11 00:23:29,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-10-11 00:23:29,625 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2021-10-11 00:23:29,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:23:29,626 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-10-11 00:23:29,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 00:23:29,626 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-10-11 00:23:29,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 00:23:29,627 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:29,627 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:23:29,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2021-10-11 00:23:29,844 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:29,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:29,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2021-10-11 00:23:29,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-11 00:23:29,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1858538182] [2021-10-11 00:23:29,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:23:29,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:29,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 00:23:29,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:23:29,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:23:29,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 00:23:29,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1858538182] [2021-10-11 00:23:29,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:23:29,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 00:23:29,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95826071] [2021-10-11 00:23:29,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 00:23:29,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-11 00:23:29,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 00:23:29,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 00:23:29,985 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2021-10-11 00:23:30,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:23:30,142 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2021-10-11 00:23:30,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:23:30,143 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2021-10-11 00:23:30,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:23:30,144 INFO L225 Difference]: With dead ends: 53 [2021-10-11 00:23:30,145 INFO L226 Difference]: Without dead ends: 44 [2021-10-11 00:23:30,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:23:30,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-11 00:23:30,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2021-10-11 00:23:30,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-11 00:23:30,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-10-11 00:23:30,152 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2021-10-11 00:23:30,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:23:30,153 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-10-11 00:23:30,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 00:23:30,153 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-10-11 00:23:30,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 00:23:30,154 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:30,154 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:23:30,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2021-10-11 00:23:30,370 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:30,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:30,371 INFO L82 PathProgramCache]: Analyzing trace with hash 502201410, now seen corresponding path program 1 times [2021-10-11 00:23:30,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-11 00:23:30,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1430920482] [2021-10-11 00:23:30,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:23:30,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:30,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-11 00:23:30,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:23:30,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:23:30,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 00:23:30,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1430920482] [2021-10-11 00:23:30,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:23:30,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 00:23:30,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097453875] [2021-10-11 00:23:30,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 00:23:30,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-11 00:23:30,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 00:23:30,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 00:23:30,550 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2021-10-11 00:23:30,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:23:30,639 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2021-10-11 00:23:30,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:23:30,640 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2021-10-11 00:23:30,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:23:30,641 INFO L225 Difference]: With dead ends: 61 [2021-10-11 00:23:30,641 INFO L226 Difference]: Without dead ends: 39 [2021-10-11 00:23:30,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:23:30,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-11 00:23:30,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2021-10-11 00:23:30,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-10-11 00:23:30,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-10-11 00:23:30,647 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 12 [2021-10-11 00:23:30,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:23:30,647 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-10-11 00:23:30,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 00:23:30,648 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-10-11 00:23:30,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-11 00:23:30,648 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:30,649 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:23:30,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2021-10-11 00:23:30,868 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:30,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:30,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1951233721, now seen corresponding path program 1 times [2021-10-11 00:23:30,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-11 00:23:30,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1311826433] [2021-10-11 00:23:30,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:23:30,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:31,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 00:23:31,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:23:31,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:23:31,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 00:23:31,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1311826433] [2021-10-11 00:23:31,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:23:31,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 00:23:31,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128174333] [2021-10-11 00:23:31,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 00:23:31,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-11 00:23:31,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 00:23:31,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 00:23:31,023 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 4 states. [2021-10-11 00:23:31,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:23:31,076 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2021-10-11 00:23:31,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:23:31,077 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2021-10-11 00:23:31,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:23:31,077 INFO L225 Difference]: With dead ends: 52 [2021-10-11 00:23:31,078 INFO L226 Difference]: Without dead ends: 43 [2021-10-11 00:23:31,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:23:31,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-11 00:23:31,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2021-10-11 00:23:31,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-11 00:23:31,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2021-10-11 00:23:31,082 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 13 [2021-10-11 00:23:31,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:23:31,083 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2021-10-11 00:23:31,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 00:23:31,083 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2021-10-11 00:23:31,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-11 00:23:31,084 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:31,084 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:23:31,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2021-10-11 00:23:31,300 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:31,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:31,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2021-10-11 00:23:31,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-11 00:23:31,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [964742777] [2021-10-11 00:23:31,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:23:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:31,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 00:23:31,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:23:31,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:23:31,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 00:23:31,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [964742777] [2021-10-11 00:23:31,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:23:31,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 00:23:31,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630447441] [2021-10-11 00:23:31,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 00:23:31,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-11 00:23:31,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 00:23:31,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 00:23:31,453 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 4 states. [2021-10-11 00:23:31,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:23:31,549 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2021-10-11 00:23:31,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:23:31,550 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2021-10-11 00:23:31,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:23:31,551 INFO L225 Difference]: With dead ends: 52 [2021-10-11 00:23:31,554 INFO L226 Difference]: Without dead ends: 43 [2021-10-11 00:23:31,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:23:31,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-11 00:23:31,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2021-10-11 00:23:31,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-10-11 00:23:31,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-10-11 00:23:31,564 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 16 [2021-10-11 00:23:31,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:23:31,566 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-10-11 00:23:31,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 00:23:31,566 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-10-11 00:23:31,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-11 00:23:31,567 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:31,567 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:23:31,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2021-10-11 00:23:31,771 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:31,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:31,772 INFO L82 PathProgramCache]: Analyzing trace with hash 874935118, now seen corresponding path program 1 times [2021-10-11 00:23:31,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-11 00:23:31,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2136286960] [2021-10-11 00:23:31,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:23:31,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:31,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-11 00:23:31,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:23:31,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:23:31,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 00:23:31,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2136286960] [2021-10-11 00:23:31,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:23:31,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-11 00:23:31,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106856263] [2021-10-11 00:23:31,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 00:23:31,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-11 00:23:31,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 00:23:31,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:23:31,921 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2021-10-11 00:23:32,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:23:32,030 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2021-10-11 00:23:32,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 00:23:32,036 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2021-10-11 00:23:32,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:23:32,037 INFO L225 Difference]: With dead ends: 43 [2021-10-11 00:23:32,037 INFO L226 Difference]: Without dead ends: 29 [2021-10-11 00:23:32,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:23:32,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-11 00:23:32,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-11 00:23:32,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-10-11 00:23:32,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-10-11 00:23:32,048 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 17 [2021-10-11 00:23:32,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:23:32,048 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-10-11 00:23:32,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 00:23:32,048 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-10-11 00:23:32,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 00:23:32,049 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:32,049 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:23:32,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2021-10-11 00:23:32,265 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:32,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:32,265 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2021-10-11 00:23:32,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-11 00:23:32,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [710916432] [2021-10-11 00:23:32,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:23:32,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:32,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 00:23:32,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:23:32,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:23:32,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 00:23:32,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [710916432] [2021-10-11 00:23:32,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:23:32,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 00:23:32,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661617760] [2021-10-11 00:23:32,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 00:23:32,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-11 00:23:32,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 00:23:32,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 00:23:32,372 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 3 states. [2021-10-11 00:23:32,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:23:32,384 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-10-11 00:23:32,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 00:23:32,385 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2021-10-11 00:23:32,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:23:32,386 INFO L225 Difference]: With dead ends: 39 [2021-10-11 00:23:32,386 INFO L226 Difference]: Without dead ends: 29 [2021-10-11 00:23:32,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 00:23:32,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-11 00:23:32,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-11 00:23:32,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-10-11 00:23:32,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-10-11 00:23:32,392 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 18 [2021-10-11 00:23:32,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:23:32,392 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-10-11 00:23:32,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 00:23:32,392 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-10-11 00:23:32,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 00:23:32,393 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:32,393 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:23:32,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2021-10-11 00:23:32,618 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:32,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:32,618 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2021-10-11 00:23:32,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-11 00:23:32,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [247631835] [2021-10-11 00:23:32,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:23:32,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:32,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-11 00:23:32,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:23:32,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:23:32,801 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 00:23:32,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [247631835] [2021-10-11 00:23:32,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:23:32,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-11 00:23:32,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922900139] [2021-10-11 00:23:32,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 00:23:32,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-11 00:23:32,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 00:23:32,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-11 00:23:32,804 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 6 states. [2021-10-11 00:23:32,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:23:32,919 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2021-10-11 00:23:32,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 00:23:32,919 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2021-10-11 00:23:32,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:23:32,920 INFO L225 Difference]: With dead ends: 41 [2021-10-11 00:23:32,920 INFO L226 Difference]: Without dead ends: 38 [2021-10-11 00:23:32,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-11 00:23:32,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-11 00:23:32,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2021-10-11 00:23:32,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-11 00:23:32,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-10-11 00:23:32,934 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 18 [2021-10-11 00:23:32,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:23:32,934 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-10-11 00:23:32,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 00:23:32,935 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-10-11 00:23:32,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 00:23:32,936 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:32,936 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:23:33,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2021-10-11 00:23:33,158 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:33,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:33,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1049593954, now seen corresponding path program 1 times [2021-10-11 00:23:33,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-11 00:23:33,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1741450711] [2021-10-11 00:23:33,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2021-10-11 00:23:33,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:33,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 00:23:33,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:23:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:23:33,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 00:23:33,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1741450711] [2021-10-11 00:23:33,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:23:33,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 00:23:33,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138040025] [2021-10-11 00:23:33,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 00:23:33,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-11 00:23:33,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 00:23:33,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 00:23:33,279 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 4 states. [2021-10-11 00:23:33,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:23:33,326 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2021-10-11 00:23:33,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:23:33,327 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2021-10-11 00:23:33,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:23:33,329 INFO L225 Difference]: With dead ends: 51 [2021-10-11 00:23:33,329 INFO L226 Difference]: Without dead ends: 42 [2021-10-11 00:23:33,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:23:33,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-11 00:23:33,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 27. [2021-10-11 00:23:33,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-10-11 00:23:33,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-10-11 00:23:33,349 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 18 [2021-10-11 00:23:33,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:23:33,350 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-10-11 00:23:33,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 00:23:33,350 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-10-11 00:23:33,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-11 00:23:33,353 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:33,353 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] [2021-10-11 00:23:33,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 mathsat -unsat_core_generation=3 [2021-10-11 00:23:33,561 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:33,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:33,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2021-10-11 00:23:33,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-11 00:23:33,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1216811995] [2021-10-11 00:23:33,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2021-10-11 00:23:33,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:23:33,702 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:23:33,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:23:33,796 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:23:33,854 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-11 00:23:33,854 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 00:23:34,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 mathsat -unsat_core_generation=3 [2021-10-11 00:23:34,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 12:23:34 BoogieIcfgContainer [2021-10-11 00:23:34,105 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 00:23:34,106 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 00:23:34,106 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 00:23:34,106 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 00:23:34,106 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:23:29" (3/4) ... [2021-10-11 00:23:34,108 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 00:23:34,180 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc6f0aa-f370-44d0-9d7b-5bd803f30368/bin/uautomizer-Z5i5R5N3CC/witness.graphml [2021-10-11 00:23:34,180 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 00:23:34,184 INFO L168 Benchmark]: Toolchain (without parser) took 5770.48 ms. Allocated memory was 81.8 MB in the beginning and 107.0 MB in the end (delta: 25.2 MB). Free memory was 47.4 MB in the beginning and 81.8 MB in the end (delta: -34.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:23:34,185 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 81.8 MB. Free memory was 64.1 MB in the beginning and 64.1 MB in the end (delta: 65.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:23:34,186 INFO L168 Benchmark]: CACSL2BoogieTranslator took 364.43 ms. Allocated memory is still 81.8 MB. Free memory was 47.2 MB in the beginning and 64.8 MB in the end (delta: -17.5 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:23:34,186 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.78 ms. Allocated memory is still 81.8 MB. Free memory was 64.8 MB in the beginning and 62.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:23:34,187 INFO L168 Benchmark]: Boogie Preprocessor took 34.05 ms. Allocated memory is still 81.8 MB. Free memory was 62.9 MB in the beginning and 61.3 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:23:34,187 INFO L168 Benchmark]: RCFGBuilder took 431.44 ms. Allocated memory is still 81.8 MB. Free memory was 61.3 MB in the beginning and 40.7 MB in the end (delta: 20.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-11 00:23:34,188 INFO L168 Benchmark]: TraceAbstraction took 4805.36 ms. Allocated memory was 81.8 MB in the beginning and 107.0 MB in the end (delta: 25.2 MB). Free memory was 40.1 MB in the beginning and 85.0 MB in the end (delta: -44.9 MB). Peak memory consumption was 30.9 MB. Max. memory is 16.1 GB. [2021-10-11 00:23:34,188 INFO L168 Benchmark]: Witness Printer took 74.04 ms. Allocated memory is still 107.0 MB. Free memory was 85.0 MB in the beginning and 81.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-11 00:23:34,194 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 81.8 MB. Free memory was 64.1 MB in the beginning and 64.1 MB in the end (delta: 65.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 364.43 ms. Allocated memory is still 81.8 MB. Free memory was 47.2 MB in the beginning and 64.8 MB in the end (delta: -17.5 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.78 ms. Allocated memory is still 81.8 MB. Free memory was 64.8 MB in the beginning and 62.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.05 ms. Allocated memory is still 81.8 MB. Free memory was 62.9 MB in the beginning and 61.3 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 431.44 ms. Allocated memory is still 81.8 MB. Free memory was 61.3 MB in the beginning and 40.7 MB in the end (delta: 20.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4805.36 ms. Allocated memory was 81.8 MB in the beginning and 107.0 MB in the end (delta: 25.2 MB). Free memory was 40.1 MB in the beginning and 85.0 MB in the end (delta: -44.9 MB). Peak memory consumption was 30.9 MB. Max. memory is 16.1 GB. * Witness Printer took 74.04 ms. Allocated memory is still 107.0 MB. Free memory was 85.0 MB in the beginning and 81.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 87]: a call to reach_error is reachable a call to reach_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) [L87] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.7s, OverallIterations: 10, TraceHistogramMax: 1, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 326 SDtfs, 209 SDslu, 383 SDs, 0 SdLazy, 132 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred 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, 9 MinimizatonAttempts, 72 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 155 NumberOfCodeBlocks, 155 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 124 ConstructedInterpolants, 6 QuantifiedInterpolants, 5474 SizeOfPredicates, 29 NumberOfNonLiveVariables, 537 ConjunctsInSsa, 46 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 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...