./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c12eaf00463983fc4c27f56efba3b68bea09d23ae311c93edfb6c8bce7a55280 .......................................................................................................................................................................................................................................................................................................... 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_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c12eaf00463983fc4c27f56efba3b68bea09d23ae311c93edfb6c8bce7a55280 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 10:19:23,471 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 10:19:23,474 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 10:19:23,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 10:19:23,513 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 10:19:23,518 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 10:19:23,520 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 10:19:23,524 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 10:19:23,526 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 10:19:23,532 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 10:19:23,533 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 10:19:23,535 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 10:19:23,535 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 10:19:23,538 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 10:19:23,540 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 10:19:23,548 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 10:19:23,549 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 10:19:23,551 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 10:19:23,553 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 10:19:23,563 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 10:19:23,565 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 10:19:23,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 10:19:23,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 10:19:23,571 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 10:19:23,580 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 10:19:23,580 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 10:19:23,581 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 10:19:23,583 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 10:19:23,584 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 10:19:23,585 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 10:19:23,586 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 10:19:23,587 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 10:19:23,589 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 10:19:23,590 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 10:19:23,592 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 10:19:23,592 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 10:19:23,593 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 10:19:23,593 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 10:19:23,593 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 10:19:23,594 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 10:19:23,595 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 10:19:23,596 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-24 10:19:23,645 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 10:19:23,645 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 10:19:23,646 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 10:19:23,646 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 10:19:23,646 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 10:19:23,646 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 10:19:23,647 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 10:19:23,647 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 10:19:23,647 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 10:19:23,647 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 10:19:23,647 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 10:19:23,647 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 10:19:23,647 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 10:19:23,648 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 10:19:23,648 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 10:19:23,648 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 10:19:23,649 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 10:19:23,649 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 10:19:23,649 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 10:19:23,649 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 10:19:23,649 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 10:19:23,649 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 10:19:23,649 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 10:19:23,649 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 10:19:23,650 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 10:19:23,650 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 10:19:23,650 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 10:19:23,650 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 10:19:23,650 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 10:19:23,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 10:19:23,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:19:23,651 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 10:19:23,651 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 10:19:23,651 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 10:19:23,651 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 10:19:23,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 10:19:23,651 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 10:19:23,652 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 10:19:23,652 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 10:19:23,652 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c12eaf00463983fc4c27f56efba3b68bea09d23ae311c93edfb6c8bce7a55280 [2021-10-24 10:19:23,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 10:19:24,006 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 10:19:24,010 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 10:19:24,011 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 10:19:24,012 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 10:19:24,013 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2021-10-24 10:19:24,071 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/data/4ba63897b/45229d711b6c49dd992ef599dfdfe40c/FLAG2e3f41b36 [2021-10-24 10:19:24,636 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 10:19:24,637 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2021-10-24 10:19:24,649 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/data/4ba63897b/45229d711b6c49dd992ef599dfdfe40c/FLAG2e3f41b36 [2021-10-24 10:19:24,979 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/data/4ba63897b/45229d711b6c49dd992ef599dfdfe40c [2021-10-24 10:19:24,981 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 10:19:24,983 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 10:19:24,984 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 10:19:24,985 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 10:19:24,988 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 10:19:24,989 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:19:24" (1/1) ... [2021-10-24 10:19:24,990 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@627d3540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:24, skipping insertion in model container [2021-10-24 10:19:24,991 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:19:24" (1/1) ... [2021-10-24 10:19:24,998 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 10:19:25,013 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 10:19:25,166 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_133bc53e-f16c-48fd-aa23-31248dd27a90/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c[1936,1949] [2021-10-24 10:19:25,169 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:19:25,177 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 10:19:25,199 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_133bc53e-f16c-48fd-aa23-31248dd27a90/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c[1936,1949] [2021-10-24 10:19:25,200 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:19:25,213 INFO L208 MainTranslator]: Completed translation [2021-10-24 10:19:25,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:25 WrapperNode [2021-10-24 10:19:25,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 10:19:25,215 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 10:19:25,215 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 10:19:25,215 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 10:19:25,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:25" (1/1) ... [2021-10-24 10:19:25,243 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:25" (1/1) ... [2021-10-24 10:19:25,279 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 10:19:25,280 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 10:19:25,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 10:19:25,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 10:19:25,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:25" (1/1) ... [2021-10-24 10:19:25,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:25" (1/1) ... [2021-10-24 10:19:25,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:25" (1/1) ... [2021-10-24 10:19:25,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:25" (1/1) ... [2021-10-24 10:19:25,298 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:25" (1/1) ... [2021-10-24 10:19:25,303 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:25" (1/1) ... [2021-10-24 10:19:25,305 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:25" (1/1) ... [2021-10-24 10:19:25,308 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 10:19:25,309 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 10:19:25,309 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 10:19:25,309 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 10:19:25,321 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:25" (1/1) ... [2021-10-24 10:19:25,329 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:19:25,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:19:25,354 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 10:19:25,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 10:19:25,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-24 10:19:25,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 10:19:25,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-10-24 10:19:25,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 10:19:25,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 10:19:25,443 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-24 10:19:25,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-24 10:19:26,134 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 10:19:26,136 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-24 10:19:26,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:19:26 BoogieIcfgContainer [2021-10-24 10:19:26,139 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 10:19:26,141 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 10:19:26,141 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 10:19:26,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 10:19:26,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 10:19:24" (1/3) ... [2021-10-24 10:19:26,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@692442ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:19:26, skipping insertion in model container [2021-10-24 10:19:26,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:25" (2/3) ... [2021-10-24 10:19:26,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@692442ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:19:26, skipping insertion in model container [2021-10-24 10:19:26,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:19:26" (3/3) ... [2021-10-24 10:19:26,151 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252b.c [2021-10-24 10:19:26,156 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 10:19:26,156 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-24 10:19:26,215 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 10:19:26,224 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, mAutomataTypeConcurrency=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 [2021-10-24 10:19:26,224 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-24 10:19:26,238 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 17 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) [2021-10-24 10:19:26,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-24 10:19:26,251 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:19:26,252 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:19:26,253 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:19:26,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:19:26,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1433219361, now seen corresponding path program 1 times [2021-10-24 10:19:26,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:19:26,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467116844] [2021-10-24 10:19:26,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:19:26,279 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:19:26,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:19:26,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:19:26,440 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:19:26,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467116844] [2021-10-24 10:19:26,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467116844] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:19:26,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:19:26,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 10:19:26,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090748082] [2021-10-24 10:19:26,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-24 10:19:26,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:19:26,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-24 10:19:26,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-24 10:19:26,470 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 17 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) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-10-24 10:19:26,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:19:26,489 INFO L93 Difference]: Finished difference Result 35 states and 51 transitions. [2021-10-24 10:19:26,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-24 10:19:26,491 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2021-10-24 10:19:26,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:19:26,497 INFO L225 Difference]: With dead ends: 35 [2021-10-24 10:19:26,498 INFO L226 Difference]: Without dead ends: 16 [2021-10-24 10:19:26,500 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 [2021-10-24 10:19:26,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-24 10:19:26,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-24 10:19:26,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 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) [2021-10-24 10:19:26,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-10-24 10:19:26,528 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 8 [2021-10-24 10:19:26,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:19:26,528 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-10-24 10:19:26,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-10-24 10:19:26,529 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-10-24 10:19:26,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-24 10:19:26,529 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:19:26,529 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:19:26,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-24 10:19:26,530 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:19:26,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:19:26,530 INFO L82 PathProgramCache]: Analyzing trace with hash -2131701560, now seen corresponding path program 1 times [2021-10-24 10:19:26,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:19:26,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747387994] [2021-10-24 10:19:26,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:19:26,531 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:19:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 10:19:26,579 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-24 10:19:26,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 10:19:26,665 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-24 10:19:26,666 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-24 10:19:26,667 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 10:19:26,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-24 10:19:26,674 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 10:19:26,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 10:19:26 BoogieIcfgContainer [2021-10-24 10:19:26,696 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 10:19:26,696 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 10:19:26,697 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 10:19:26,697 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 10:19:26,697 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:19:26" (3/4) ... [2021-10-24 10:19:26,700 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-24 10:19:26,700 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 10:19:26,702 INFO L168 Benchmark]: Toolchain (without parser) took 1718.62 ms. Allocated memory is still 113.2 MB. Free memory was 75.9 MB in the beginning and 86.4 MB in the end (delta: -10.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:19:26,703 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 113.2 MB. Free memory is still 92.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:19:26,703 INFO L168 Benchmark]: CACSL2BoogieTranslator took 229.32 ms. Allocated memory is still 113.2 MB. Free memory was 75.7 MB in the beginning and 65.4 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-24 10:19:26,704 INFO L168 Benchmark]: Boogie Procedure Inliner took 64.66 ms. Allocated memory is still 113.2 MB. Free memory was 65.4 MB in the beginning and 63.6 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:19:26,705 INFO L168 Benchmark]: Boogie Preprocessor took 28.51 ms. Allocated memory is still 113.2 MB. Free memory was 63.6 MB in the beginning and 62.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:19:26,705 INFO L168 Benchmark]: RCFGBuilder took 829.94 ms. Allocated memory is still 113.2 MB. Free memory was 62.2 MB in the beginning and 71.5 MB in the end (delta: -9.3 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.1 GB. [2021-10-24 10:19:26,706 INFO L168 Benchmark]: TraceAbstraction took 554.92 ms. Allocated memory is still 113.2 MB. Free memory was 71.2 MB in the beginning and 86.4 MB in the end (delta: -15.2 MB). Peak memory consumption was 27.6 MB. Max. memory is 16.1 GB. [2021-10-24 10:19:26,706 INFO L168 Benchmark]: Witness Printer took 4.10 ms. Allocated memory is still 113.2 MB. Free memory is still 86.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:19:26,710 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 113.2 MB. Free memory is still 92.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 229.32 ms. Allocated memory is still 113.2 MB. Free memory was 75.7 MB in the beginning and 65.4 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 64.66 ms. Allocated memory is still 113.2 MB. Free memory was 65.4 MB in the beginning and 63.6 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.51 ms. Allocated memory is still 113.2 MB. Free memory was 63.6 MB in the beginning and 62.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 829.94 ms. Allocated memory is still 113.2 MB. Free memory was 62.2 MB in the beginning and 71.5 MB in the end (delta: -9.3 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 554.92 ms. Allocated memory is still 113.2 MB. Free memory was 71.2 MB in the beginning and 86.4 MB in the end (delta: -15.2 MB). Peak memory consumption was 27.6 MB. Max. memory is 16.1 GB. * Witness Printer took 4.10 ms. Allocated memory is still 113.2 MB. Free memory is still 86.4 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: 81]: 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 80, overapproximation of someUnaryFLOAToperation at line 76. Possible FailurePath: [L75] float x = 0.0f; [L76] float y = -0.0f; [L23] __uint32_t w; [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (x) [L28] EXPR gf_u.word [L28] (w) = gf_u.word [L31] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L33-L34] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L36-L37] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L39] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L42] return 0; [L46] COND TRUE __fpclassify_float(x) == 0 [L47] return y; [L77] float res = fmax_float(x, y); [L80] EXPR res == 0.0f && __signbit_float(res) == 0 [L80] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L81] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 460.3ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 17.6ms, AutomataDifference: 48.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 19 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 13.1ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 11.7ms SsaConstructionTime, 69.7ms SatisfiabilityAnalysisTime, 58.8ms InterpolantComputationTime, 17 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 7 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-24 10:19:26,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/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-e943c26 [2021-10-24 10:19:29,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 10:19:29,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 10:19:29,288 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 10:19:29,288 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 10:19:29,293 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 10:19:29,295 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 10:19:29,300 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 10:19:29,303 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 10:19:29,310 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 10:19:29,312 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 10:19:29,314 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 10:19:29,314 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 10:19:29,317 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 10:19:29,319 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 10:19:29,321 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 10:19:29,322 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 10:19:29,323 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 10:19:29,327 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 10:19:29,335 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 10:19:29,337 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 10:19:29,338 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 10:19:29,341 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 10:19:29,343 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 10:19:29,351 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 10:19:29,352 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 10:19:29,353 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 10:19:29,354 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 10:19:29,355 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 10:19:29,356 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 10:19:29,357 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 10:19:29,358 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 10:19:29,360 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 10:19:29,360 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 10:19:29,362 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 10:19:29,362 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 10:19:29,363 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 10:19:29,364 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 10:19:29,373 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 10:19:29,375 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 10:19:29,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 10:19:29,381 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-24 10:19:29,424 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 10:19:29,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 10:19:29,426 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 10:19:29,426 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 10:19:29,426 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 10:19:29,427 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 10:19:29,427 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 10:19:29,427 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 10:19:29,427 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 10:19:29,429 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 10:19:29,430 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 10:19:29,430 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 10:19:29,430 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 10:19:29,430 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 10:19:29,431 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 10:19:29,431 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 10:19:29,431 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 10:19:29,431 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-24 10:19:29,432 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-24 10:19:29,432 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 10:19:29,432 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 10:19:29,432 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 10:19:29,433 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 10:19:29,433 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 10:19:29,433 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-24 10:19:29,433 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 10:19:29,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:19:29,434 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 10:19:29,434 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 10:19:29,434 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 10:19:29,435 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-24 10:19:29,435 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-24 10:19:29,435 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 10:19:29,435 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 10:19:29,436 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 10:19:29,436 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_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c12eaf00463983fc4c27f56efba3b68bea09d23ae311c93edfb6c8bce7a55280 [2021-10-24 10:19:29,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 10:19:29,868 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 10:19:29,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 10:19:29,872 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 10:19:29,873 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 10:19:29,874 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2021-10-24 10:19:29,941 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/data/873eca818/fa5266efbead4715a59c3ba948a0b621/FLAGfa6a7ebb7 [2021-10-24 10:19:30,428 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 10:19:30,429 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c [2021-10-24 10:19:30,435 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/data/873eca818/fa5266efbead4715a59c3ba948a0b621/FLAGfa6a7ebb7 [2021-10-24 10:19:30,787 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/data/873eca818/fa5266efbead4715a59c3ba948a0b621 [2021-10-24 10:19:30,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 10:19:30,791 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 10:19:30,795 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 10:19:30,795 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 10:19:30,798 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 10:19:30,799 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:19:30" (1/1) ... [2021-10-24 10:19:30,800 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28214441 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:30, skipping insertion in model container [2021-10-24 10:19:30,800 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:19:30" (1/1) ... [2021-10-24 10:19:30,808 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 10:19:30,825 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 10:19:30,994 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_133bc53e-f16c-48fd-aa23-31248dd27a90/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c[1936,1949] [2021-10-24 10:19:31,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:19:31,017 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 10:19:31,063 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_133bc53e-f16c-48fd-aa23-31248dd27a90/sv-benchmarks/c/float-newlib/float_req_bl_1252b.c[1936,1949] [2021-10-24 10:19:31,064 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:19:31,082 INFO L208 MainTranslator]: Completed translation [2021-10-24 10:19:31,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:31 WrapperNode [2021-10-24 10:19:31,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 10:19:31,084 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 10:19:31,084 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 10:19:31,085 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 10:19:31,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:31" (1/1) ... [2021-10-24 10:19:31,111 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:31" (1/1) ... [2021-10-24 10:19:31,144 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 10:19:31,146 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 10:19:31,146 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 10:19:31,146 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 10:19:31,154 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:31" (1/1) ... [2021-10-24 10:19:31,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:31" (1/1) ... [2021-10-24 10:19:31,166 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:31" (1/1) ... [2021-10-24 10:19:31,167 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:31" (1/1) ... [2021-10-24 10:19:31,185 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:31" (1/1) ... [2021-10-24 10:19:31,194 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:31" (1/1) ... [2021-10-24 10:19:31,202 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:31" (1/1) ... [2021-10-24 10:19:31,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 10:19:31,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 10:19:31,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 10:19:31,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 10:19:31,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:31" (1/1) ... [2021-10-24 10:19:31,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:19:31,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:19:31,270 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 10:19:31,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 10:19:31,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-24 10:19:31,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 10:19:31,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-24 10:19:31,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 10:19:31,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 10:19:31,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2021-10-24 10:19:31,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-24 10:19:31,720 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 10:19:31,721 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-10-24 10:19:31,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:19:31 BoogieIcfgContainer [2021-10-24 10:19:31,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 10:19:31,724 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 10:19:31,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 10:19:31,727 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 10:19:31,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 10:19:30" (1/3) ... [2021-10-24 10:19:31,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c414ed5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:19:31, skipping insertion in model container [2021-10-24 10:19:31,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:19:31" (2/3) ... [2021-10-24 10:19:31,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c414ed5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:19:31, skipping insertion in model container [2021-10-24 10:19:31,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:19:31" (3/3) ... [2021-10-24 10:19:31,730 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1252b.c [2021-10-24 10:19:31,736 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 10:19:31,736 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-24 10:19:31,812 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 10:19:31,819 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, mAutomataTypeConcurrency=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 [2021-10-24 10:19:31,819 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-24 10:19:31,834 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 31 states have internal predecessors, (50), 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) [2021-10-24 10:19:31,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-24 10:19:31,846 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:19:31,847 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:19:31,847 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:19:31,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:19:31,861 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2021-10-24 10:19:31,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:19:31,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [805639419] [2021-10-24 10:19:31,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:19:31,876 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:19:31,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:19:31,888 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:19:31,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-24 10:19:31,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:19:31,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-24 10:19:31,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:19:32,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:19:32,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:19:32,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:19:32,101 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:19:32,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [805639419] [2021-10-24 10:19:32,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [805639419] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:19:32,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:19:32,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-24 10:19:32,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243529573] [2021-10-24 10:19:32,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-24 10:19:32,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:19:32,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-24 10:19:32,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-24 10:19:32,130 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 31 states have internal predecessors, (50), 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) [2021-10-24 10:19:32,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:19:32,148 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2021-10-24 10:19:32,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-24 10:19:32,149 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 [2021-10-24 10:19:32,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:19:32,158 INFO L225 Difference]: With dead ends: 62 [2021-10-24 10:19:32,159 INFO L226 Difference]: Without dead ends: 29 [2021-10-24 10:19:32,161 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-24 10:19:32,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-24 10:19:32,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-24 10:19:32,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 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) [2021-10-24 10:19:32,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-10-24 10:19:32,189 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2021-10-24 10:19:32,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:19:32,189 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-10-24 10:19:32,190 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) [2021-10-24 10:19:32,190 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-10-24 10:19:32,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-24 10:19:32,191 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:19:32,191 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:19:32,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-24 10:19:32,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:19:32,404 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:19:32,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:19:32,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2021-10-24 10:19:32,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:19:32,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013790183] [2021-10-24 10:19:32,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:19:32,407 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:19:32,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:19:32,421 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:19:32,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-24 10:19:32,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:19:32,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 10:19:32,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:19:32,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:19:32,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:19:32,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:19:32,699 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:19:32,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1013790183] [2021-10-24 10:19:32,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1013790183] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:19:32,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:19:32,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-24 10:19:32,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344406717] [2021-10-24 10:19:32,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-24 10:19:32,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:19:32,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-24 10:19:32,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-24 10:19:32,719 INFO L87 Difference]: Start difference. First operand 29 states and 40 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) [2021-10-24 10:19:32,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:19:32,823 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2021-10-24 10:19:32,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 10:19:32,825 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 [2021-10-24 10:19:32,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:19:32,826 INFO L225 Difference]: With dead ends: 68 [2021-10-24 10:19:32,826 INFO L226 Difference]: Without dead ends: 59 [2021-10-24 10:19:32,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-24 10:19:32,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-24 10:19:32,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2021-10-24 10:19:32,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 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) [2021-10-24 10:19:32,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-10-24 10:19:32,841 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2021-10-24 10:19:32,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:19:32,842 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-10-24 10:19:32,842 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) [2021-10-24 10:19:32,843 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-10-24 10:19:32,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-24 10:19:32,844 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:19:32,845 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:19:32,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-24 10:19:33,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:19:33,059 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:19:33,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:19:33,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2021-10-24 10:19:33,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:19:33,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [684356845] [2021-10-24 10:19:33,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:19:33,061 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:19:33,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:19:33,067 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:19:33,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-24 10:19:33,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:19:33,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-24 10:19:33,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:19:33,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:19:33,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:19:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:19:33,380 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:19:33,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [684356845] [2021-10-24 10:19:33,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [684356845] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:19:33,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:19:33,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-24 10:19:33,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427157366] [2021-10-24 10:19:33,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:19:33,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:19:33,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:19:33,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:19:33,390 INFO L87 Difference]: Start difference. First operand 31 states and 42 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) [2021-10-24 10:19:33,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:19:33,447 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2021-10-24 10:19:33,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:19:33,449 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 [2021-10-24 10:19:33,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:19:33,451 INFO L225 Difference]: With dead ends: 52 [2021-10-24 10:19:33,451 INFO L226 Difference]: Without dead ends: 26 [2021-10-24 10:19:33,452 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-24 10:19:33,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-24 10:19:33,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-24 10:19:33,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 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) [2021-10-24 10:19:33,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-10-24 10:19:33,466 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2021-10-24 10:19:33,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:19:33,467 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-10-24 10:19:33,467 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) [2021-10-24 10:19:33,468 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-10-24 10:19:33,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-24 10:19:33,471 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:19:33,471 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:19:33,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-24 10:19:33,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:19:33,672 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:19:33,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:19:33,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2021-10-24 10:19:33,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:19:33,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1090640056] [2021-10-24 10:19:33,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:19:33,674 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:19:33,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:19:33,675 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:19:33,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-24 10:19:33,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:19:33,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 10:19:33,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:19:33,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:19:33,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:19:33,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:19:33,886 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:19:33,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1090640056] [2021-10-24 10:19:33,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1090640056] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:19:33,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:19:33,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-24 10:19:33,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833082711] [2021-10-24 10:19:33,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-24 10:19:33,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:19:33,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-24 10:19:33,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-24 10:19:33,890 INFO L87 Difference]: Start difference. First operand 26 states and 32 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) [2021-10-24 10:19:33,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:19:33,960 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2021-10-24 10:19:33,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 10:19:33,961 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 [2021-10-24 10:19:33,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:19:33,965 INFO L225 Difference]: With dead ends: 61 [2021-10-24 10:19:33,965 INFO L226 Difference]: Without dead ends: 52 [2021-10-24 10:19:33,966 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-24 10:19:33,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-24 10:19:33,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2021-10-24 10:19:33,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 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) [2021-10-24 10:19:33,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-10-24 10:19:33,979 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2021-10-24 10:19:33,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:19:33,979 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-10-24 10:19:33,980 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) [2021-10-24 10:19:33,980 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-10-24 10:19:33,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-24 10:19:33,982 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:19:33,983 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:19:33,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-24 10:19:34,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:19:34,196 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:19:34,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:19:34,197 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2021-10-24 10:19:34,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:19:34,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1043811814] [2021-10-24 10:19:34,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:19:34,198 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:19:34,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:19:34,198 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:19:34,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-24 10:19:34,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:19:34,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-24 10:19:34,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:19:34,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:19:34,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:19:34,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:19:34,541 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:19:34,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1043811814] [2021-10-24 10:19:34,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1043811814] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:19:34,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:19:34,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-24 10:19:34,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200945198] [2021-10-24 10:19:34,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:19:34,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:19:34,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:19:34,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:19:34,544 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2021-10-24 10:19:34,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:19:34,553 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2021-10-24 10:19:34,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:19:34,554 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 [2021-10-24 10:19:34,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:19:34,555 INFO L225 Difference]: With dead ends: 38 [2021-10-24 10:19:34,555 INFO L226 Difference]: Without dead ends: 28 [2021-10-24 10:19:34,555 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:19:34,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-24 10:19:34,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-24 10:19:34,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 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) [2021-10-24 10:19:34,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-10-24 10:19:34,559 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2021-10-24 10:19:34,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:19:34,559 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-10-24 10:19:34,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2021-10-24 10:19:34,560 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-10-24 10:19:34,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-24 10:19:34,561 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:19:34,561 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:19:34,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-10-24 10:19:34,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:19:34,780 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:19:34,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:19:34,780 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2021-10-24 10:19:34,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:19:34,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [430907999] [2021-10-24 10:19:34,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:19:34,781 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:19:34,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:19:34,784 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:19:34,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-24 10:19:34,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:19:34,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-24 10:19:34,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:19:35,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:19:35,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:19:35,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:19:35,103 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:19:35,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [430907999] [2021-10-24 10:19:35,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [430907999] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:19:35,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:19:35,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-10-24 10:19:35,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192244568] [2021-10-24 10:19:35,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 10:19:35,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:19:35,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 10:19:35,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-24 10:19:35,105 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 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) [2021-10-24 10:19:35,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:19:35,200 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-10-24 10:19:35,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 10:19:35,200 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 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 [2021-10-24 10:19:35,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:19:35,201 INFO L225 Difference]: With dead ends: 40 [2021-10-24 10:19:35,201 INFO L226 Difference]: Without dead ends: 37 [2021-10-24 10:19:35,202 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 96.9ms TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-10-24 10:19:35,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-24 10:19:35,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-10-24 10:19:35,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 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) [2021-10-24 10:19:35,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-10-24 10:19:35,206 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2021-10-24 10:19:35,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:19:35,206 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-10-24 10:19:35,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 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) [2021-10-24 10:19:35,207 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-10-24 10:19:35,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-24 10:19:35,207 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:19:35,208 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:19:35,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-24 10:19:35,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:19:35,422 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:19:35,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:19:35,422 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2021-10-24 10:19:35,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:19:35,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [489479079] [2021-10-24 10:19:35,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:19:35,423 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:19:35,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:19:35,424 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:19:35,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-24 10:19:35,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:19:35,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-24 10:19:35,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:19:35,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:19:35,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:19:35,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:19:35,767 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:19:35,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [489479079] [2021-10-24 10:19:35,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [489479079] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:19:35,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:19:35,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-24 10:19:35,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803646122] [2021-10-24 10:19:35,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 10:19:35,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:19:35,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 10:19:35,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-24 10:19:35,770 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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) [2021-10-24 10:19:35,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:19:35,810 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-10-24 10:19:35,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 10:19:35,812 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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 19 [2021-10-24 10:19:35,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:19:35,812 INFO L225 Difference]: With dead ends: 43 [2021-10-24 10:19:35,812 INFO L226 Difference]: Without dead ends: 23 [2021-10-24 10:19:35,813 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-24 10:19:35,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-24 10:19:35,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-24 10:19:35,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0) internal successors, (22), 22 states have internal predecessors, (22), 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) [2021-10-24 10:19:35,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2021-10-24 10:19:35,816 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 19 [2021-10-24 10:19:35,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:19:35,816 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2021-10-24 10:19:35,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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) [2021-10-24 10:19:35,817 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2021-10-24 10:19:35,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-24 10:19:35,817 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:19:35,817 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:19:35,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-24 10:19:36,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:19:36,034 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:19:36,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:19:36,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2021-10-24 10:19:36,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:19:36,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1864307190] [2021-10-24 10:19:36,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:19:36,035 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:19:36,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:19:36,038 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:19:36,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-24 10:19:36,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 10:19:36,210 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-24 10:19:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 10:19:36,323 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-24 10:19:36,324 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-24 10:19:36,325 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 10:19:36,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-24 10:19:36,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:19:36,533 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 10:19:36,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 10:19:36 BoogieIcfgContainer [2021-10-24 10:19:36,569 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 10:19:36,569 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 10:19:36,570 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 10:19:36,570 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 10:19:36,570 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:19:31" (3/4) ... [2021-10-24 10:19:36,572 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-24 10:19:36,623 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/witness.graphml [2021-10-24 10:19:36,623 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 10:19:36,625 INFO L168 Benchmark]: Toolchain (without parser) took 5832.73 ms. Allocated memory was 60.8 MB in the beginning and 86.0 MB in the end (delta: 25.2 MB). Free memory was 41.2 MB in the beginning and 45.1 MB in the end (delta: -3.9 MB). Peak memory consumption was 21.2 MB. Max. memory is 16.1 GB. [2021-10-24 10:19:36,625 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 60.8 MB. Free memory is still 41.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:19:36,626 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.98 ms. Allocated memory is still 60.8 MB. Free memory was 41.0 MB in the beginning and 30.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-24 10:19:36,626 INFO L168 Benchmark]: Boogie Procedure Inliner took 60.23 ms. Allocated memory is still 60.8 MB. Free memory was 30.3 MB in the beginning and 28.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:19:36,627 INFO L168 Benchmark]: Boogie Preprocessor took 61.93 ms. Allocated memory is still 60.8 MB. Free memory was 28.5 MB in the beginning and 27.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:19:36,627 INFO L168 Benchmark]: RCFGBuilder took 514.43 ms. Allocated memory is still 60.8 MB. Free memory was 26.8 MB in the beginning and 33.0 MB in the end (delta: -6.2 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. [2021-10-24 10:19:36,628 INFO L168 Benchmark]: TraceAbstraction took 4844.45 ms. Allocated memory was 60.8 MB in the beginning and 86.0 MB in the end (delta: 25.2 MB). Free memory was 32.7 MB in the beginning and 47.9 MB in the end (delta: -15.2 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. [2021-10-24 10:19:36,628 INFO L168 Benchmark]: Witness Printer took 54.02 ms. Allocated memory is still 86.0 MB. Free memory was 47.9 MB in the beginning and 45.1 MB in the end (delta: 2.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:19:36,631 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 60.8 MB. Free memory is still 41.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 288.98 ms. Allocated memory is still 60.8 MB. Free memory was 41.0 MB in the beginning and 30.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 60.23 ms. Allocated memory is still 60.8 MB. Free memory was 30.3 MB in the beginning and 28.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 61.93 ms. Allocated memory is still 60.8 MB. Free memory was 28.5 MB in the beginning and 27.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 514.43 ms. Allocated memory is still 60.8 MB. Free memory was 26.8 MB in the beginning and 33.0 MB in the end (delta: -6.2 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4844.45 ms. Allocated memory was 60.8 MB in the beginning and 86.0 MB in the end (delta: 25.2 MB). Free memory was 32.7 MB in the beginning and 47.9 MB in the end (delta: -15.2 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. * Witness Printer took 54.02 ms. Allocated memory is still 86.0 MB. Free memory was 47.9 MB in the beginning and 45.1 MB in the end (delta: 2.8 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 - CounterExampleResult [Line: 81]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L75] float x = 0.0f; [L76] float y = -0.0f; [L23] __uint32_t w; [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (x) [L28] EXPR gf_u.word [L28] (w) = gf_u.word [L31] COND TRUE w == 0x00000000 || w == 0x80000000 [L32] return 2; [L46] COND FALSE !(__fpclassify_float(x) == 0) [L23] __uint32_t w; [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (x) [L28] EXPR gf_u.word [L28] (w) = gf_u.word [L31] COND TRUE w == 0x00000000 || w == 0x80000000 [L32] return 2; [L50] COND FALSE !(__fpclassify_float(y) == 0) [L53] EXPR x > y ? x : y [L53] return x > y ? x : y; [L77] float res = fmax_float(x, y); [L80] EXPR res == 0.0f && __signbit_float(res) == 0 [L57] __uint32_t w; [L60] ieee_float_shape_type gf_u; [L61] gf_u.value = (x) [L62] EXPR gf_u.word [L62] (w) = gf_u.word [L65] return (w & 0x80000000) != 0; [L80] EXPR res == 0.0f && __signbit_float(res) == 0 [L80] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L81] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4721.0ms, OverallIterations: 8, TraceHistogramMax: 1, EmptinessCheckTime: 25.4ms, AutomataDifference: 473.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 222 SDtfs, 167 SDslu, 326 SDs, 0 SdLazy, 105 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 161.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 209 GetRequests, 172 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 285.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred 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: 66.2ms AutomataMinimizationTime, 7 MinimizatonAttempts, 59 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 97.8ms SsaConstructionTime, 311.3ms SatisfiabilityAnalysisTime, 1302.9ms InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 198 ConstructedInterpolants, 0 QuantifiedInterpolants, 501 SizeOfPredicates, 27 NumberOfNonLiveVariables, 413 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-24 10:19:36,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_133bc53e-f16c-48fd-aa23-31248dd27a90/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...