./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1250.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1250.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt --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 7498db39da300a600c956afc9ee769ef7c520660 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1250.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt --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 7498db39da300a600c956afc9ee769ef7c520660 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-12 23:59:06,679 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-12 23:59:06,681 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-12 23:59:06,752 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-12 23:59:06,753 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-12 23:59:06,758 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-12 23:59:06,760 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-12 23:59:06,765 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-12 23:59:06,768 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-12 23:59:06,776 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-12 23:59:06,777 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-12 23:59:06,779 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-12 23:59:06,780 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-12 23:59:06,782 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-12 23:59:06,785 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-12 23:59:06,791 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-12 23:59:06,793 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-12 23:59:06,795 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-12 23:59:06,797 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-12 23:59:06,811 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-12 23:59:06,813 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-12 23:59:06,815 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-12 23:59:06,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-12 23:59:06,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-12 23:59:06,823 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-12 23:59:06,824 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-12 23:59:06,825 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-12 23:59:06,826 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-12 23:59:06,827 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-12 23:59:06,829 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-12 23:59:06,829 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-12 23:59:06,830 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-12 23:59:06,832 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-12 23:59:06,834 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-12 23:59:06,835 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-12 23:59:06,835 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-12 23:59:06,836 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-12 23:59:06,837 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-12 23:59:06,837 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-12 23:59:06,838 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-12 23:59:06,839 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-12 23:59:06,840 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-12 23:59:06,889 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-12 23:59:06,889 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-12 23:59:06,890 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-12 23:59:06,890 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-12 23:59:06,898 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-12 23:59:06,898 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-12 23:59:06,899 INFO L138 SettingsManager]: * Use SBE=true [2021-10-12 23:59:06,899 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-12 23:59:06,899 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-12 23:59:06,899 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-12 23:59:06,900 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-12 23:59:06,900 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-12 23:59:06,901 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-12 23:59:06,901 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-12 23:59:06,901 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-12 23:59:06,901 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-12 23:59:06,901 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-12 23:59:06,902 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-12 23:59:06,902 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-12 23:59:06,902 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-12 23:59:06,902 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-12 23:59:06,903 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-12 23:59:06,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-12 23:59:06,903 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-12 23:59:06,903 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-12 23:59:06,903 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-12 23:59:06,904 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-12 23:59:06,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-12 23:59:06,904 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-12 23:59:06,905 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-12 23:59:06,906 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_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7498db39da300a600c956afc9ee769ef7c520660 [2021-10-12 23:59:07,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-12 23:59:07,265 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-12 23:59:07,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-12 23:59:07,270 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-12 23:59:07,271 INFO L275 PluginConnector]: CDTParser initialized [2021-10-12 23:59:07,272 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/float-newlib/float_req_bl_1250.c [2021-10-12 23:59:07,363 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/data/cf3f70242/4cbd87d296224284ba3165af8002f29f/FLAGc60b07d4e [2021-10-12 23:59:07,929 INFO L306 CDTParser]: Found 1 translation units. [2021-10-12 23:59:07,930 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/sv-benchmarks/c/float-newlib/float_req_bl_1250.c [2021-10-12 23:59:07,943 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/data/cf3f70242/4cbd87d296224284ba3165af8002f29f/FLAGc60b07d4e [2021-10-12 23:59:08,284 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/data/cf3f70242/4cbd87d296224284ba3165af8002f29f [2021-10-12 23:59:08,290 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-12 23:59:08,292 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-12 23:59:08,308 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-12 23:59:08,308 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-12 23:59:08,311 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-12 23:59:08,312 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 11:59:08" (1/1) ... [2021-10-12 23:59:08,313 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72f70a58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:08, skipping insertion in model container [2021-10-12 23:59:08,314 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 11:59:08" (1/1) ... [2021-10-12 23:59:08,321 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-12 23:59:08,336 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-12 23:59:08,589 WARN L228 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_bedc0982-3548-45bc-a405-91831f091150/sv-benchmarks/c/float-newlib/float_req_bl_1250.c[1719,1732] [2021-10-12 23:59:08,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-12 23:59:08,608 INFO L203 MainTranslator]: Completed pre-run [2021-10-12 23:59:08,648 WARN L228 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_bedc0982-3548-45bc-a405-91831f091150/sv-benchmarks/c/float-newlib/float_req_bl_1250.c[1719,1732] [2021-10-12 23:59:08,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-12 23:59:08,667 INFO L208 MainTranslator]: Completed translation [2021-10-12 23:59:08,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:08 WrapperNode [2021-10-12 23:59:08,671 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-12 23:59:08,672 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-12 23:59:08,673 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-12 23:59:08,673 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-12 23:59:08,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:08" (1/1) ... [2021-10-12 23:59:08,698 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:08" (1/1) ... [2021-10-12 23:59:08,732 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-12 23:59:08,733 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-12 23:59:08,733 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-12 23:59:08,733 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-12 23:59:08,742 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:08" (1/1) ... [2021-10-12 23:59:08,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:08" (1/1) ... [2021-10-12 23:59:08,747 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:08" (1/1) ... [2021-10-12 23:59:08,748 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:08" (1/1) ... [2021-10-12 23:59:08,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:08" (1/1) ... [2021-10-12 23:59:08,774 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:08" (1/1) ... [2021-10-12 23:59:08,777 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:08" (1/1) ... [2021-10-12 23:59:08,784 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-12 23:59:08,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-12 23:59:08,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-12 23:59:08,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-12 23:59:08,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:08" (1/1) ... [2021-10-12 23:59:08,796 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-12 23:59:08,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:08,825 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:08,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-12 23:59:08,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-12 23:59:08,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-12 23:59:08,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-10-12 23:59:08,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-12 23:59:08,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-12 23:59:08,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-12 23:59:08,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-12 23:59:09,261 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-12 23:59:09,261 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2021-10-12 23:59:09,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:59:09 BoogieIcfgContainer [2021-10-12 23:59:09,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-12 23:59:09,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-12 23:59:09,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-12 23:59:09,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-12 23:59:09,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 11:59:08" (1/3) ... [2021-10-12 23:59:09,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@527c621e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 11:59:09, skipping insertion in model container [2021-10-12 23:59:09,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:08" (2/3) ... [2021-10-12 23:59:09,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@527c621e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 11:59:09, skipping insertion in model container [2021-10-12 23:59:09,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:59:09" (3/3) ... [2021-10-12 23:59:09,274 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1250.c [2021-10-12 23:59:09,280 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-12 23:59:09,281 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-12 23:59:09,367 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-12 23:59:09,379 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-12 23:59:09,379 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-12 23:59:09,398 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:09,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-12 23:59:09,408 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:09,408 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:09,410 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:09,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:09,420 INFO L82 PathProgramCache]: Analyzing trace with hash -958093107, now seen corresponding path program 1 times [2021-10-12 23:59:09,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:09,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737514709] [2021-10-12 23:59:09,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:09,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:09,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:09,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:09,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:09,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737514709] [2021-10-12 23:59:09,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737514709] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:09,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:09,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-12 23:59:09,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534579332] [2021-10-12 23:59:09,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-12 23:59:09,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:09,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-12 23:59:09,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-12 23:59:09,701 INFO L87 Difference]: Start difference. First operand has 28 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:09,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:09,724 INFO L93 Difference]: Finished difference Result 54 states and 84 transitions. [2021-10-12 23:59:09,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-12 23:59:09,726 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-12 23:59:09,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:09,736 INFO L225 Difference]: With dead ends: 54 [2021-10-12 23:59:09,736 INFO L226 Difference]: Without dead ends: 25 [2021-10-12 23:59:09,740 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-12 23:59:09,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-12 23:59:09,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-10-12 23:59:09,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:09,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2021-10-12 23:59:09,783 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 10 [2021-10-12 23:59:09,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:09,784 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2021-10-12 23:59:09,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:09,785 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2021-10-12 23:59:09,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-12 23:59:09,786 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:09,786 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:09,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-12 23:59:09,787 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:09,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:09,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1001566992, now seen corresponding path program 1 times [2021-10-12 23:59:09,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:09,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089424431] [2021-10-12 23:59:09,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:09,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:09,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:09,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:09,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:09,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089424431] [2021-10-12 23:59:09,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089424431] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:09,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:09,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-12 23:59:09,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736372256] [2021-10-12 23:59:09,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-12 23:59:09,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:09,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-12 23:59:09,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:09,910 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:09,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:09,965 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2021-10-12 23:59:09,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-12 23:59:09,966 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-12 23:59:09,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:09,967 INFO L225 Difference]: With dead ends: 41 [2021-10-12 23:59:09,967 INFO L226 Difference]: Without dead ends: 36 [2021-10-12 23:59:09,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-12 23:59:09,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-12 23:59:09,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2021-10-12 23:59:09,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:09,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-10-12 23:59:09,975 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 11 [2021-10-12 23:59:09,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:09,976 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-10-12 23:59:09,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:09,976 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-10-12 23:59:09,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-12 23:59:09,977 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:09,978 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:09,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-12 23:59:09,978 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:09,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:09,979 INFO L82 PathProgramCache]: Analyzing trace with hash 502183504, now seen corresponding path program 1 times [2021-10-12 23:59:09,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:09,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787553093] [2021-10-12 23:59:09,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:09,980 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:10,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:10,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:10,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:10,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787553093] [2021-10-12 23:59:10,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787553093] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:10,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:10,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-12 23:59:10,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111737541] [2021-10-12 23:59:10,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-12 23:59:10,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:10,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-12 23:59:10,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:10,043 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:10,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:10,092 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2021-10-12 23:59:10,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-12 23:59:10,093 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-12 23:59:10,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:10,094 INFO L225 Difference]: With dead ends: 43 [2021-10-12 23:59:10,094 INFO L226 Difference]: Without dead ends: 38 [2021-10-12 23:59:10,095 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-12 23:59:10,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-12 23:59:10,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2021-10-12 23:59:10,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:10,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-10-12 23:59:10,102 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 12 [2021-10-12 23:59:10,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:10,102 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-10-12 23:59:10,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:10,103 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-10-12 23:59:10,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-12 23:59:10,104 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:10,104 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:10,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-12 23:59:10,105 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:10,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:10,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1951251627, now seen corresponding path program 1 times [2021-10-12 23:59:10,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:10,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346322847] [2021-10-12 23:59:10,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:10,107 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:10,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:10,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:10,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346322847] [2021-10-12 23:59:10,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346322847] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:10,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:10,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-12 23:59:10,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811182937] [2021-10-12 23:59:10,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-12 23:59:10,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:10,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-12 23:59:10,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:10,205 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:10,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:10,255 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2021-10-12 23:59:10,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-12 23:59:10,256 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-12 23:59:10,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:10,258 INFO L225 Difference]: With dead ends: 45 [2021-10-12 23:59:10,258 INFO L226 Difference]: Without dead ends: 40 [2021-10-12 23:59:10,259 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-12 23:59:10,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-12 23:59:10,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 27. [2021-10-12 23:59:10,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:10,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-10-12 23:59:10,265 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 13 [2021-10-12 23:59:10,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:10,266 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-10-12 23:59:10,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:10,267 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-10-12 23:59:10,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-12 23:59:10,268 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:10,268 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:10,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-12 23:59:10,269 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:10,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:10,269 INFO L82 PathProgramCache]: Analyzing trace with hash -555778251, now seen corresponding path program 1 times [2021-10-12 23:59:10,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:10,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010601597] [2021-10-12 23:59:10,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:10,271 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:10,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:10,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-12 23:59:10,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010601597] [2021-10-12 23:59:10,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010601597] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:10,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:10,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-12 23:59:10,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725238158] [2021-10-12 23:59:10,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-12 23:59:10,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-12 23:59:10,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-12 23:59:10,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-12 23:59:10,343 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:10,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:10,414 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2021-10-12 23:59:10,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-12 23:59:10,416 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-12 23:59:10,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:10,417 INFO L225 Difference]: With dead ends: 43 [2021-10-12 23:59:10,418 INFO L226 Difference]: Without dead ends: 38 [2021-10-12 23:59:10,418 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-12 23:59:10,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-12 23:59:10,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2021-10-12 23:59:10,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:10,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-10-12 23:59:10,434 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 14 [2021-10-12 23:59:10,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:10,435 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-10-12 23:59:10,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:10,437 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-10-12 23:59:10,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-12 23:59:10,438 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:10,438 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:10,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-12 23:59:10,439 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:10,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:10,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1219229111, now seen corresponding path program 1 times [2021-10-12 23:59:10,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-12 23:59:10,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47089346] [2021-10-12 23:59:10,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:10,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-12 23:59:10,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-12 23:59:10,486 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-12 23:59:10,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-12 23:59:10,552 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-12 23:59:10,552 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-12 23:59:10,553 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-12 23:59:10,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-12 23:59:10,562 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-12 23:59:10,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 11:59:10 BoogieIcfgContainer [2021-10-12 23:59:10,591 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-12 23:59:10,591 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-12 23:59:10,592 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-12 23:59:10,592 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-12 23:59:10,592 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:59:09" (3/4) ... [2021-10-12 23:59:10,596 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-12 23:59:10,596 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-12 23:59:10,598 INFO L168 Benchmark]: Toolchain (without parser) took 2305.32 ms. Allocated memory was 94.4 MB in the beginning and 123.7 MB in the end (delta: 29.4 MB). Free memory was 61.3 MB in the beginning and 93.0 MB in the end (delta: -31.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-12 23:59:10,599 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 94.4 MB. Free memory is still 47.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-12 23:59:10,600 INFO L168 Benchmark]: CACSL2BoogieTranslator took 363.68 ms. Allocated memory is still 94.4 MB. Free memory was 61.1 MB in the beginning and 68.7 MB in the end (delta: -7.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-12 23:59:10,600 INFO L168 Benchmark]: Boogie Procedure Inliner took 60.25 ms. Allocated memory is still 94.4 MB. Free memory was 68.7 MB in the beginning and 67.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-12 23:59:10,601 INFO L168 Benchmark]: Boogie Preprocessor took 52.37 ms. Allocated memory is still 94.4 MB. Free memory was 67.0 MB in the beginning and 65.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-12 23:59:10,602 INFO L168 Benchmark]: RCFGBuilder took 477.60 ms. Allocated memory is still 94.4 MB. Free memory was 65.5 MB in the beginning and 53.6 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-12 23:59:10,603 INFO L168 Benchmark]: TraceAbstraction took 1325.50 ms. Allocated memory was 94.4 MB in the beginning and 123.7 MB in the end (delta: 29.4 MB). Free memory was 53.0 MB in the beginning and 93.0 MB in the end (delta: -40.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-12 23:59:10,603 INFO L168 Benchmark]: Witness Printer took 4.81 ms. Allocated memory is still 123.7 MB. Free memory is still 93.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-12 23:59:10,608 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 94.4 MB. Free memory is still 47.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 363.68 ms. Allocated memory is still 94.4 MB. Free memory was 61.1 MB in the beginning and 68.7 MB in the end (delta: -7.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 60.25 ms. Allocated memory is still 94.4 MB. Free memory was 68.7 MB in the beginning and 67.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 52.37 ms. Allocated memory is still 94.4 MB. Free memory was 67.0 MB in the beginning and 65.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 477.60 ms. Allocated memory is still 94.4 MB. Free memory was 65.5 MB in the beginning and 53.6 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1325.50 ms. Allocated memory was 94.4 MB in the beginning and 123.7 MB in the end (delta: 29.4 MB). Free memory was 53.0 MB in the beginning and 93.0 MB in the end (delta: -40.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 4.81 ms. Allocated memory is still 123.7 MB. Free memory is still 93.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 67]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 56, overapproximation of someBinaryArithmeticFLOAToperation at line 62. Possible FailurePath: [L62] float x = 0.0f / 0.0f; [L63] float y = 0.0f / 0.0f; [L22] __uint32_t w; [L25] ieee_float_shape_type gf_u; [L26] gf_u.value = (x) [L27] EXPR gf_u.word [L27] (w) = gf_u.word [L30] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L32-L33] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L35-L36] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L38] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L41] return 0; [L45] COND TRUE __fpclassify_float(x) == 0 [L46] return y; [L64] float res = fmax_float(x, y); [L56] return x != x; [L66] COND TRUE !isnan_float(res) [L67] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1195.7ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 19.1ms, AutomataDifference: 304.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 206 SDtfs, 44 SDslu, 238 SDs, 0 SdLazy, 84 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 110.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=0, InterpolantAutomatonStates: 18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 61.0ms AutomataMinimizationTime, 5 MinimizatonAttempts, 44 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 34.6ms SsaConstructionTime, 178.8ms SatisfiabilityAnalysisTime, 269.5ms InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 71 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 [2021-10-12 23:59:10,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-12 23:59:13,381 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-12 23:59:13,385 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-12 23:59:13,429 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-12 23:59:13,430 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-12 23:59:13,435 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-12 23:59:13,438 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-12 23:59:13,448 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-12 23:59:13,452 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-12 23:59:13,457 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-12 23:59:13,459 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-12 23:59:13,461 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-12 23:59:13,461 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-12 23:59:13,464 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-12 23:59:13,466 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-12 23:59:13,469 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-12 23:59:13,471 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-12 23:59:13,472 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-12 23:59:13,483 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-12 23:59:13,491 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-12 23:59:13,497 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-12 23:59:13,501 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-12 23:59:13,503 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-12 23:59:13,506 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-12 23:59:13,516 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-12 23:59:13,516 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-12 23:59:13,517 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-12 23:59:13,519 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-12 23:59:13,520 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-12 23:59:13,521 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-12 23:59:13,522 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-12 23:59:13,523 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-12 23:59:13,525 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-12 23:59:13,526 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-12 23:59:13,528 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-12 23:59:13,528 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-12 23:59:13,529 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-12 23:59:13,530 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-12 23:59:13,530 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-12 23:59:13,532 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-12 23:59:13,533 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-12 23:59:13,539 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-10-12 23:59:13,582 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-12 23:59:13,583 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-12 23:59:13,583 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-12 23:59:13,584 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-12 23:59:13,586 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-12 23:59:13,586 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-12 23:59:13,587 INFO L138 SettingsManager]: * Use SBE=true [2021-10-12 23:59:13,588 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-12 23:59:13,588 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-12 23:59:13,588 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-12 23:59:13,589 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-12 23:59:13,589 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-12 23:59:13,590 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-12 23:59:13,590 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-12 23:59:13,590 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-12 23:59:13,590 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-12 23:59:13,591 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-12 23:59:13,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-12 23:59:13,591 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-12 23:59:13,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-12 23:59:13,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-12 23:59:13,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-12 23:59:13,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-12 23:59:13,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-12 23:59:13,592 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-12 23:59:13,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-12 23:59:13,593 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-12 23:59:13,593 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-12 23:59:13,594 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-12 23:59:13,594 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-12 23:59:13,594 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-12 23:59:13,594 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-12 23:59:13,595 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_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7498db39da300a600c956afc9ee769ef7c520660 [2021-10-12 23:59:13,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-12 23:59:13,978 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-12 23:59:13,982 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-12 23:59:13,983 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-12 23:59:13,984 INFO L275 PluginConnector]: CDTParser initialized [2021-10-12 23:59:13,985 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/float-newlib/float_req_bl_1250.c [2021-10-12 23:59:14,051 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/data/4e00ebd87/46df69e0acd94370bf1b176d44e4c6ca/FLAG95b875004 [2021-10-12 23:59:14,590 INFO L306 CDTParser]: Found 1 translation units. [2021-10-12 23:59:14,590 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/sv-benchmarks/c/float-newlib/float_req_bl_1250.c [2021-10-12 23:59:14,599 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/data/4e00ebd87/46df69e0acd94370bf1b176d44e4c6ca/FLAG95b875004 [2021-10-12 23:59:14,932 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/data/4e00ebd87/46df69e0acd94370bf1b176d44e4c6ca [2021-10-12 23:59:14,935 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-12 23:59:14,936 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-12 23:59:14,938 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-12 23:59:14,938 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-12 23:59:14,946 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-12 23:59:14,947 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 11:59:14" (1/1) ... [2021-10-12 23:59:14,948 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@668daef2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:14, skipping insertion in model container [2021-10-12 23:59:14,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 11:59:14" (1/1) ... [2021-10-12 23:59:14,956 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-12 23:59:14,976 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-12 23:59:15,150 WARN L228 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_bedc0982-3548-45bc-a405-91831f091150/sv-benchmarks/c/float-newlib/float_req_bl_1250.c[1719,1732] [2021-10-12 23:59:15,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-12 23:59:15,169 INFO L203 MainTranslator]: Completed pre-run [2021-10-12 23:59:15,191 WARN L228 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_bedc0982-3548-45bc-a405-91831f091150/sv-benchmarks/c/float-newlib/float_req_bl_1250.c[1719,1732] [2021-10-12 23:59:15,192 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-12 23:59:15,221 INFO L208 MainTranslator]: Completed translation [2021-10-12 23:59:15,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:15 WrapperNode [2021-10-12 23:59:15,222 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-12 23:59:15,223 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-12 23:59:15,224 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-12 23:59:15,224 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-12 23:59:15,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:15" (1/1) ... [2021-10-12 23:59:15,263 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:15" (1/1) ... [2021-10-12 23:59:15,286 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-12 23:59:15,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-12 23:59:15,288 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-12 23:59:15,288 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-12 23:59:15,296 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:15" (1/1) ... [2021-10-12 23:59:15,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:15" (1/1) ... [2021-10-12 23:59:15,301 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:15" (1/1) ... [2021-10-12 23:59:15,301 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:15" (1/1) ... [2021-10-12 23:59:15,310 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:15" (1/1) ... [2021-10-12 23:59:15,315 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:15" (1/1) ... [2021-10-12 23:59:15,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:15" (1/1) ... [2021-10-12 23:59:15,321 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-12 23:59:15,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-12 23:59:15,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-12 23:59:15,322 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-12 23:59:15,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:15" (1/1) ... [2021-10-12 23:59:15,337 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-12 23:59:15,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-12 23:59:15,378 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-12 23:59:15,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-12 23:59:15,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-12 23:59:15,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-12 23:59:15,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-12 23:59:15,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-12 23:59:15,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-12 23:59:15,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2021-10-12 23:59:15,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-12 23:59:15,895 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-12 23:59:15,895 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2021-10-12 23:59:15,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:59:15 BoogieIcfgContainer [2021-10-12 23:59:15,897 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-12 23:59:15,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-12 23:59:15,899 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-12 23:59:15,902 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-12 23:59:15,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 11:59:14" (1/3) ... [2021-10-12 23:59:15,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50295f05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 11:59:15, skipping insertion in model container [2021-10-12 23:59:15,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:59:15" (2/3) ... [2021-10-12 23:59:15,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50295f05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 11:59:15, skipping insertion in model container [2021-10-12 23:59:15,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:59:15" (3/3) ... [2021-10-12 23:59:15,909 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1250.c [2021-10-12 23:59:15,919 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-12 23:59:15,920 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-12 23:59:15,985 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-12 23:59:15,996 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-12 23:59:15,997 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-12 23:59:16,015 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:16,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-12 23:59:16,025 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:16,026 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:16,027 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:16,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:16,038 INFO L82 PathProgramCache]: Analyzing trace with hash -958093107, now seen corresponding path program 1 times [2021-10-12 23:59:16,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-12 23:59:16,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1411817315] [2021-10-12 23:59:16,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:16,053 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-12 23:59:16,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-12 23:59:16,058 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-12 23:59:16,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-12 23:59:16,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:16,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-12 23:59:16,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:16,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:16,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-12 23:59:16,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:16,300 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-12 23:59:16,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1411817315] [2021-10-12 23:59:16,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1411817315] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:16,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:16,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-12 23:59:16,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294943384] [2021-10-12 23:59:16,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-12 23:59:16,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-12 23:59:16,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-12 23:59:16,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-12 23:59:16,349 INFO L87 Difference]: Start difference. First operand has 28 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:16,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:16,384 INFO L93 Difference]: Finished difference Result 54 states and 84 transitions. [2021-10-12 23:59:16,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-12 23:59:16,387 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-12 23:59:16,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:16,397 INFO L225 Difference]: With dead ends: 54 [2021-10-12 23:59:16,397 INFO L226 Difference]: Without dead ends: 25 [2021-10-12 23:59:16,400 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-12 23:59:16,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-12 23:59:16,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-10-12 23:59:16,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:16,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2021-10-12 23:59:16,439 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 10 [2021-10-12 23:59:16,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:16,440 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2021-10-12 23:59:16,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:16,441 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2021-10-12 23:59:16,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-12 23:59:16,442 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:16,442 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:16,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:16,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-12 23:59:16,659 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:16,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:16,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1001566992, now seen corresponding path program 1 times [2021-10-12 23:59:16,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-12 23:59:16,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [990730545] [2021-10-12 23:59:16,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:16,672 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-12 23:59:16,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-12 23:59:16,676 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-12 23:59:16,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-12 23:59:16,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:16,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-12 23:59:16,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:16,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:16,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-12 23:59:16,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:16,869 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-12 23:59:16,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [990730545] [2021-10-12 23:59:16,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [990730545] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:16,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:16,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-12 23:59:16,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366785813] [2021-10-12 23:59:16,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-12 23:59:16,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-12 23:59:16,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-12 23:59:16,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-12 23:59:16,874 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:17,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:17,015 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2021-10-12 23:59:17,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-12 23:59:17,016 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-12 23:59:17,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:17,017 INFO L225 Difference]: With dead ends: 52 [2021-10-12 23:59:17,017 INFO L226 Difference]: Without dead ends: 47 [2021-10-12 23:59:17,018 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-12 23:59:17,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-12 23:59:17,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 27. [2021-10-12 23:59:17,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:17,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-10-12 23:59:17,026 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 11 [2021-10-12 23:59:17,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:17,026 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-10-12 23:59:17,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:17,026 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-10-12 23:59:17,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-12 23:59:17,027 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:17,028 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:17,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:17,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-12 23:59:17,229 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:17,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:17,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1219229111, now seen corresponding path program 1 times [2021-10-12 23:59:17,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-12 23:59:17,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [782722830] [2021-10-12 23:59:17,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:17,242 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-12 23:59:17,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-12 23:59:17,244 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-12 23:59:17,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-12 23:59:17,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:17,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-12 23:59:17,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:17,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:17,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-12 23:59:17,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:17,787 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-12 23:59:17,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [782722830] [2021-10-12 23:59:17,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [782722830] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:17,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:17,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-10-12 23:59:17,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294794015] [2021-10-12 23:59:17,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-12 23:59:17,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-12 23:59:17,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-12 23:59:17,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-12 23:59:17,791 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:18,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:18,104 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2021-10-12 23:59:18,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-12 23:59:18,105 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-12 23:59:18,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:18,106 INFO L225 Difference]: With dead ends: 36 [2021-10-12 23:59:18,106 INFO L226 Difference]: Without dead ends: 27 [2021-10-12 23:59:18,107 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 329.3ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-10-12 23:59:18,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-12 23:59:18,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-10-12 23:59:18,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:18,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2021-10-12 23:59:18,112 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 14 [2021-10-12 23:59:18,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:18,112 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2021-10-12 23:59:18,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:18,112 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2021-10-12 23:59:18,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-12 23:59:18,113 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:18,113 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:18,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-10-12 23:59:18,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-12 23:59:18,323 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:18,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:18,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1012428811, now seen corresponding path program 1 times [2021-10-12 23:59:18,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-12 23:59:18,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1524608440] [2021-10-12 23:59:18,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:18,325 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-12 23:59:18,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-12 23:59:18,328 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-12 23:59:18,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-12 23:59:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:18,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-12 23:59:18,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:18,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:18,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-12 23:59:18,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:18,591 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-12 23:59:18,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1524608440] [2021-10-12 23:59:18,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1524608440] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:18,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:18,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-12 23:59:18,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730046432] [2021-10-12 23:59:18,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-12 23:59:18,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-12 23:59:18,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-12 23:59:18,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-12 23:59:18,597 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:18,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:18,727 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2021-10-12 23:59:18,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-12 23:59:18,729 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-12 23:59:18,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:18,730 INFO L225 Difference]: With dead ends: 52 [2021-10-12 23:59:18,731 INFO L226 Difference]: Without dead ends: 47 [2021-10-12 23:59:18,731 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-12 23:59:18,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-12 23:59:18,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 27. [2021-10-12 23:59:18,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:18,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2021-10-12 23:59:18,737 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 16 [2021-10-12 23:59:18,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:18,737 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2021-10-12 23:59:18,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:18,738 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2021-10-12 23:59:18,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-12 23:59:18,738 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:18,739 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:18,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:18,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-12 23:59:18,960 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:18,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:18,961 INFO L82 PathProgramCache]: Analyzing trace with hash -356841937, now seen corresponding path program 1 times [2021-10-12 23:59:18,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-12 23:59:18,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [926013020] [2021-10-12 23:59:18,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:18,962 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-12 23:59:18,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-12 23:59:18,964 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-12 23:59:18,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-12 23:59:19,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:19,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-12 23:59:19,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:19,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:19,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-12 23:59:19,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:19,547 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-12 23:59:19,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [926013020] [2021-10-12 23:59:19,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [926013020] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:19,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:19,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-10-12 23:59:19,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383984034] [2021-10-12 23:59:19,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-12 23:59:19,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-12 23:59:19,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-12 23:59:19,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-12 23:59:19,550 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:19,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:19,876 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2021-10-12 23:59:19,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-12 23:59:19,877 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-12 23:59:19,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:19,877 INFO L225 Difference]: With dead ends: 32 [2021-10-12 23:59:19,878 INFO L226 Difference]: Without dead ends: 23 [2021-10-12 23:59:19,878 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 397.8ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-10-12 23:59:19,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-12 23:59:19,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-12 23:59:19,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:19,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-10-12 23:59:19,883 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2021-10-12 23:59:19,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:19,883 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-10-12 23:59:19,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:19,884 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-10-12 23:59:19,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-12 23:59:19,884 INFO L504 BasicCegarLoop]: Found error trace [2021-10-12 23:59:19,885 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-12 23:59:19,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-10-12 23:59:20,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-12 23:59:20,094 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-12 23:59:20,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-12 23:59:20,094 INFO L82 PathProgramCache]: Analyzing trace with hash -208376157, now seen corresponding path program 1 times [2021-10-12 23:59:20,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-12 23:59:20,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1136438727] [2021-10-12 23:59:20,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-12 23:59:20,095 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-12 23:59:20,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-12 23:59:20,097 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-12 23:59:20,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-12 23:59:20,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-12 23:59:20,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-12 23:59:20,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-12 23:59:20,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:20,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-12 23:59:20,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-12 23:59:20,596 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-12 23:59:20,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1136438727] [2021-10-12 23:59:20,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1136438727] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-12 23:59:20,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-12 23:59:20,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-10-12 23:59:20,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912470159] [2021-10-12 23:59:20,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-12 23:59:20,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-12 23:59:20,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-12 23:59:20,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-12 23:59:20,598 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:20,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-12 23:59:20,858 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-10-12 23:59:20,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-12 23:59:20,859 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-12 23:59:20,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-12 23:59:20,859 INFO L225 Difference]: With dead ends: 23 [2021-10-12 23:59:20,859 INFO L226 Difference]: Without dead ends: 0 [2021-10-12 23:59:20,860 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 324.7ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-10-12 23:59:20,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-12 23:59:20,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-12 23:59:20,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:20,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-12 23:59:20,860 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2021-10-12 23:59:20,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-12 23:59:20,861 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-12 23:59:20,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-12 23:59:20,861 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-12 23:59:20,861 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-12 23:59:20,864 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-12 23:59:20,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-12 23:59:21,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-12 23:59:21,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-12 23:59:21,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-12 23:59:21,111 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-12 23:59:21,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-12 23:59:21,124 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-12 23:59:21,132 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-12 23:59:21,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-12 23:59:21,134 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-12 23:59:21,231 INFO L853 garLoopResultBuilder]: At program point L56(line 56) the Hoare annotation is: (and (not (fp.eq ULTIMATE.start_fmax_float_~y ULTIMATE.start_fmax_float_~y)) (exists ((currentRoundingMode RoundingMode)) (= |ULTIMATE.start_fmax_float_#res| (fp.div currentRoundingMode (_ +zero 8 24) (_ +zero 8 24)))) (= (_ bv1 32) |ULTIMATE.start_isnan_float_#res|)) [2021-10-12 23:59:21,231 INFO L857 garLoopResultBuilder]: For program point L52(line 52) no Hoare annotation was computed. [2021-10-12 23:59:21,231 INFO L857 garLoopResultBuilder]: For program point L52-2(line 52) no Hoare annotation was computed. [2021-10-12 23:59:21,231 INFO L853 garLoopResultBuilder]: At program point L52-3(lines 44 53) the Hoare annotation is: (and (not (fp.eq ULTIMATE.start_fmax_float_~y ULTIMATE.start_fmax_float_~y)) (exists ((currentRoundingMode RoundingMode)) (= |ULTIMATE.start_fmax_float_#res| (fp.div currentRoundingMode (_ +zero 8 24) (_ +zero 8 24))))) [2021-10-12 23:59:21,232 INFO L857 garLoopResultBuilder]: For program point L32(lines 32 41) no Hoare annotation was computed. [2021-10-12 23:59:21,232 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-12 23:59:21,232 INFO L857 garLoopResultBuilder]: For program point L32-1(lines 32 41) no Hoare annotation was computed. [2021-10-12 23:59:21,232 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-12 23:59:21,232 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-12 23:59:21,232 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 67) no Hoare annotation was computed. [2021-10-12 23:59:21,232 INFO L857 garLoopResultBuilder]: For program point L24-1(lines 24 28) no Hoare annotation was computed. [2021-10-12 23:59:21,232 INFO L853 garLoopResultBuilder]: At program point L24-2(lines 24 28) the Hoare annotation is: (and (not (fp.eq ULTIMATE.start_fmax_float_~y ULTIMATE.start_fmax_float_~y)) (not (fp.eq ULTIMATE.start_fmax_float_~x ULTIMATE.start_fmax_float_~x))) [2021-10-12 23:59:21,232 INFO L857 garLoopResultBuilder]: For program point L24-3(lines 21 42) no Hoare annotation was computed. [2021-10-12 23:59:21,233 INFO L857 garLoopResultBuilder]: For program point L24-5(lines 24 28) no Hoare annotation was computed. [2021-10-12 23:59:21,233 INFO L853 garLoopResultBuilder]: At program point L24-6(lines 24 28) the Hoare annotation is: (and (not (fp.eq ULTIMATE.start_fmax_float_~y ULTIMATE.start_fmax_float_~y)) (not (fp.eq ULTIMATE.start_fmax_float_~x ULTIMATE.start_fmax_float_~x))) [2021-10-12 23:59:21,233 INFO L857 garLoopResultBuilder]: For program point L24-7(lines 21 42) no Hoare annotation was computed. [2021-10-12 23:59:21,233 INFO L857 garLoopResultBuilder]: For program point L49(lines 49 51) no Hoare annotation was computed. [2021-10-12 23:59:21,233 INFO L857 garLoopResultBuilder]: For program point L45(lines 45 47) no Hoare annotation was computed. [2021-10-12 23:59:21,233 INFO L853 garLoopResultBuilder]: At program point L41(lines 21 42) the Hoare annotation is: (and (not (fp.eq ULTIMATE.start_fmax_float_~y ULTIMATE.start_fmax_float_~y)) (not (fp.eq ULTIMATE.start_fmax_float_~x ULTIMATE.start_fmax_float_~x))) [2021-10-12 23:59:21,233 INFO L853 garLoopResultBuilder]: At program point L41-1(lines 21 42) the Hoare annotation is: (let ((.cse0 (not (fp.eq ULTIMATE.start_fmax_float_~y ULTIMATE.start_fmax_float_~y)))) (or (and .cse0 (not (fp.eq ULTIMATE.start_fmax_float_~x ULTIMATE.start_fmax_float_~x))) (and .cse0 (not (= (_ bv0 32) |ULTIMATE.start___fpclassify_float_#res|))))) [2021-10-12 23:59:21,233 INFO L857 garLoopResultBuilder]: For program point L66(lines 66 69) no Hoare annotation was computed. [2021-10-12 23:59:21,234 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-12 23:59:21,234 INFO L860 garLoopResultBuilder]: At program point L71(lines 58 72) the Hoare annotation is: true [2021-10-12 23:59:21,234 INFO L857 garLoopResultBuilder]: For program point L38(lines 38 41) no Hoare annotation was computed. [2021-10-12 23:59:21,234 INFO L857 garLoopResultBuilder]: For program point L38-1(lines 38 41) no Hoare annotation was computed. [2021-10-12 23:59:21,234 INFO L857 garLoopResultBuilder]: For program point L67(line 67) no Hoare annotation was computed. [2021-10-12 23:59:21,234 INFO L857 garLoopResultBuilder]: For program point L35(lines 35 41) no Hoare annotation was computed. [2021-10-12 23:59:21,234 INFO L857 garLoopResultBuilder]: For program point L35-1(lines 35 41) no Hoare annotation was computed. [2021-10-12 23:59:21,238 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-12 23:59:21,250 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] [2021-10-12 23:59:21,251 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] [2021-10-12 23:59:21,252 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] [2021-10-12 23:59:21,252 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] [2021-10-12 23:59:21,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 11:59:21 BoogieIcfgContainer [2021-10-12 23:59:21,254 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-12 23:59:21,255 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-12 23:59:21,255 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-12 23:59:21,255 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-12 23:59:21,256 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:59:15" (3/4) ... [2021-10-12 23:59:21,259 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-12 23:59:21,270 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-10-12 23:59:21,271 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-12 23:59:21,271 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-12 23:59:21,271 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-12 23:59:21,296 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: !~fp.eq~FLOAT(y, y) && (\exists currentRoundingMode : FloatRoundingMode :: \result == ~fp.div~FLOAT(currentRoundingMode, ~Pluszero~LONGDOUBLE(), ~Pluszero~LONGDOUBLE())) [2021-10-12 23:59:21,296 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (!~fp.eq~FLOAT(y, y) && (\exists currentRoundingMode : FloatRoundingMode :: \result == ~fp.div~FLOAT(currentRoundingMode, ~Pluszero~LONGDOUBLE(), ~Pluszero~LONGDOUBLE()))) && 1bv32 == \result [2021-10-12 23:59:21,297 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (!~fp.eq~FLOAT(y, y) && !~fp.eq~FLOAT(x, x)) || (!~fp.eq~FLOAT(y, y) && !(0bv32 == \result)) [2021-10-12 23:59:21,315 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/witness.graphml [2021-10-12 23:59:21,315 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-12 23:59:21,317 INFO L168 Benchmark]: Toolchain (without parser) took 6379.48 ms. Allocated memory was 54.5 MB in the beginning and 81.8 MB in the end (delta: 27.3 MB). Free memory was 30.7 MB in the beginning and 43.0 MB in the end (delta: -12.4 MB). Peak memory consumption was 13.7 MB. Max. memory is 16.1 GB. [2021-10-12 23:59:21,317 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 54.5 MB. Free memory was 34.5 MB in the beginning and 34.5 MB in the end (delta: 62.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-12 23:59:21,318 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.45 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 30.4 MB in the beginning and 49.9 MB in the end (delta: -19.5 MB). Peak memory consumption was 8.3 MB. Max. memory is 16.1 GB. [2021-10-12 23:59:21,318 INFO L168 Benchmark]: Boogie Procedure Inliner took 63.33 ms. Allocated memory is still 67.1 MB. Free memory was 49.9 MB in the beginning and 48.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-12 23:59:21,318 INFO L168 Benchmark]: Boogie Preprocessor took 33.43 ms. Allocated memory is still 67.1 MB. Free memory was 48.2 MB in the beginning and 46.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-12 23:59:21,319 INFO L168 Benchmark]: RCFGBuilder took 575.75 ms. Allocated memory is still 67.1 MB. Free memory was 46.7 MB in the beginning and 47.4 MB in the end (delta: -670.4 kB). Peak memory consumption was 16.4 MB. Max. memory is 16.1 GB. [2021-10-12 23:59:21,319 INFO L168 Benchmark]: TraceAbstraction took 5355.31 ms. Allocated memory was 67.1 MB in the beginning and 81.8 MB in the end (delta: 14.7 MB). Free memory was 46.9 MB in the beginning and 46.6 MB in the end (delta: 286.6 kB). Peak memory consumption was 16.4 MB. Max. memory is 16.1 GB. [2021-10-12 23:59:21,325 INFO L168 Benchmark]: Witness Printer took 60.33 ms. Allocated memory is still 81.8 MB. Free memory was 45.9 MB in the beginning and 43.0 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-12 23:59:21,328 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 54.5 MB. Free memory was 34.5 MB in the beginning and 34.5 MB in the end (delta: 62.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 284.45 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 30.4 MB in the beginning and 49.9 MB in the end (delta: -19.5 MB). Peak memory consumption was 8.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 63.33 ms. Allocated memory is still 67.1 MB. Free memory was 49.9 MB in the beginning and 48.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.43 ms. Allocated memory is still 67.1 MB. Free memory was 48.2 MB in the beginning and 46.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 575.75 ms. Allocated memory is still 67.1 MB. Free memory was 46.7 MB in the beginning and 47.4 MB in the end (delta: -670.4 kB). Peak memory consumption was 16.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5355.31 ms. Allocated memory was 67.1 MB in the beginning and 81.8 MB in the end (delta: 14.7 MB). Free memory was 46.9 MB in the beginning and 46.6 MB in the end (delta: 286.6 kB). Peak memory consumption was 16.4 MB. Max. memory is 16.1 GB. * Witness Printer took 60.33 ms. Allocated memory is still 81.8 MB. Free memory was 45.9 MB in the beginning and 43.0 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 67]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5254.8ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 19.9ms, AutomataDifference: 1274.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 165.3ms, InitialAbstractionConstructionTime: 12.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 182 SDtfs, 126 SDslu, 523 SDs, 0 SdLazy, 132 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 403.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 181 GetRequests, 130 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 7 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1135.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=0, InterpolantAutomatonStates: 33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 46.0ms AutomataMinimizationTime, 6 MinimizatonAttempts, 42 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 19 NumberOfFragments, 74 HoareAnnotationTreeSize, 7 FomulaSimplifications, 227 FormulaSimplificationTreeSizeReduction, 72.8ms HoareSimplificationTime, 7 FomulaSimplificationsInter, 8 FormulaSimplificationTreeSizeReductionInter, 86.6ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 69.8ms SsaConstructionTime, 247.7ms SatisfiabilityAnalysisTime, 1733.9ms InterpolantComputationTime, 88 NumberOfCodeBlocks, 88 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 164 ConstructedInterpolants, 36 QuantifiedInterpolants, 538 SizeOfPredicates, 32 NumberOfNonLiveVariables, 359 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 12 InterpolantComputations, 12 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: !~fp.eq~FLOAT(y, y) && !~fp.eq~FLOAT(x, x) - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: !~fp.eq~FLOAT(y, y) && !~fp.eq~FLOAT(x, x) - InvariantResult [Line: 56]: Loop Invariant [2021-10-12 23:59:21,338 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] [2021-10-12 23:59:21,338 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] Derived loop invariant: (!~fp.eq~FLOAT(y, y) && (\exists currentRoundingMode : FloatRoundingMode :: \result == ~fp.div~FLOAT(currentRoundingMode, ~Pluszero~LONGDOUBLE(), ~Pluszero~LONGDOUBLE()))) && 1bv32 == \result - InvariantResult [Line: 44]: Loop Invariant [2021-10-12 23:59:21,339 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] [2021-10-12 23:59:21,340 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] Derived loop invariant: !~fp.eq~FLOAT(y, y) && (\exists currentRoundingMode : FloatRoundingMode :: \result == ~fp.div~FLOAT(currentRoundingMode, ~Pluszero~LONGDOUBLE(), ~Pluszero~LONGDOUBLE())) - InvariantResult [Line: 58]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: !~fp.eq~FLOAT(y, y) && !~fp.eq~FLOAT(x, x) - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (!~fp.eq~FLOAT(y, y) && !~fp.eq~FLOAT(x, x)) || (!~fp.eq~FLOAT(y, y) && !(0bv32 == \result)) RESULT: Ultimate proved your program to be correct! [2021-10-12 23:59:21,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bedc0982-3548-45bc-a405-91831f091150/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...