./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1251.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1251.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V --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 de540e539c3db6027c1fdb04fcc6cae02aafb8aa58950d31054b2b0b8391af6d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:06:02,592 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:06:02,594 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:06:02,634 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:06:02,635 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:06:02,636 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:06:02,638 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:06:02,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:06:02,642 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:06:02,644 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:06:02,645 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:06:02,646 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:06:02,647 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:06:02,648 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:06:02,650 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:06:02,652 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:06:02,653 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:06:02,654 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:06:02,656 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:06:02,659 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:06:02,661 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:06:02,671 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:06:02,673 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:06:02,674 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:06:02,679 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:06:02,681 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:06:02,682 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:06:02,684 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:06:02,684 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:06:02,685 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:06:02,686 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:06:02,692 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:06:02,693 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:06:02,693 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:06:02,695 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:06:02,695 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:06:02,696 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:06:02,696 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:06:02,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:06:02,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:06:02,698 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:06:02,699 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:06:02,741 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:06:02,741 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:06:02,741 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:06:02,742 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:06:02,742 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:06:02,742 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:06:02,743 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:06:02,743 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:06:02,743 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:06:02,743 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:06:02,743 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:06:02,744 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:06:02,744 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:06:02,744 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:06:02,744 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:06:02,744 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:06:02,744 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:06:02,745 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:06:02,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:06:02,745 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:06:02,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:06:02,746 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:06:02,746 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:06:02,746 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:06:02,746 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:06:02,747 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:06:02,747 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:06:02,747 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:06:02,747 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:06:02,747 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:06:02,753 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:06:02,754 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:06:02,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:06:02,761 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:06:02,761 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:06:02,761 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:06:02,762 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:06:02,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:06:02,763 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:06:02,763 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:06:02,763 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:06:02,764 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_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de540e539c3db6027c1fdb04fcc6cae02aafb8aa58950d31054b2b0b8391af6d [2021-11-23 02:06:03,053 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:06:03,083 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:06:03,086 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:06:03,087 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:06:03,087 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:06:03,089 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/float-newlib/float_req_bl_1251.c [2021-11-23 02:06:03,172 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/data/fef52118d/3f5969b9ac5a45a9a8a417a0f4878eba/FLAGb9fc236b4 [2021-11-23 02:06:03,626 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:06:03,627 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/sv-benchmarks/c/float-newlib/float_req_bl_1251.c [2021-11-23 02:06:03,633 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/data/fef52118d/3f5969b9ac5a45a9a8a417a0f4878eba/FLAGb9fc236b4 [2021-11-23 02:06:04,024 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/data/fef52118d/3f5969b9ac5a45a9a8a417a0f4878eba [2021-11-23 02:06:04,027 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:06:04,028 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:06:04,033 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:06:04,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:06:04,045 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:06:04,046 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:06:04" (1/1) ... [2021-11-23 02:06:04,047 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6897a658 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:04, skipping insertion in model container [2021-11-23 02:06:04,048 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:06:04" (1/1) ... [2021-11-23 02:06:04,055 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:06:04,076 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:06:04,222 WARN L230 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_47772e56-0450-483b-a47a-7102c09024ab/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[1980,1993] [2021-11-23 02:06:04,225 WARN L230 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_47772e56-0450-483b-a47a-7102c09024ab/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[2139,2152] [2021-11-23 02:06:04,226 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:06:04,233 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:06:04,256 WARN L230 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_47772e56-0450-483b-a47a-7102c09024ab/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[1980,1993] [2021-11-23 02:06:04,257 WARN L230 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_47772e56-0450-483b-a47a-7102c09024ab/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[2139,2152] [2021-11-23 02:06:04,259 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:06:04,272 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:06:04,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:04 WrapperNode [2021-11-23 02:06:04,273 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:06:04,274 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:06:04,274 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:06:04,275 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:06:04,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:04" (1/1) ... [2021-11-23 02:06:04,290 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:04" (1/1) ... [2021-11-23 02:06:04,319 INFO L137 Inliner]: procedures = 18, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 107 [2021-11-23 02:06:04,319 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:06:04,320 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:06:04,320 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:06:04,320 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:06:04,329 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:04" (1/1) ... [2021-11-23 02:06:04,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:04" (1/1) ... [2021-11-23 02:06:04,332 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:04" (1/1) ... [2021-11-23 02:06:04,332 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:04" (1/1) ... [2021-11-23 02:06:04,339 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:04" (1/1) ... [2021-11-23 02:06:04,344 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:04" (1/1) ... [2021-11-23 02:06:04,346 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:04" (1/1) ... [2021-11-23 02:06:04,349 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:06:04,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:06:04,350 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:06:04,350 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:06:04,351 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:04" (1/1) ... [2021-11-23 02:06:04,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:06:04,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:06:04,400 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:06:04,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:06:04,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:06:04,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:06:04,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:06:04,445 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2021-11-23 02:06:04,445 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2021-11-23 02:06:04,445 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2021-11-23 02:06:04,445 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2021-11-23 02:06:04,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-11-23 02:06:04,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:06:04,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:06:04,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:06:04,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:06:04,550 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:06:04,552 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:06:04,766 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:06:04,850 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:06:04,850 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 02:06:04,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:06:04 BoogieIcfgContainer [2021-11-23 02:06:04,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:06:04,854 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:06:04,854 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:06:04,857 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:06:04,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:06:04" (1/3) ... [2021-11-23 02:06:04,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44759326 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:06:04, skipping insertion in model container [2021-11-23 02:06:04,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:04" (2/3) ... [2021-11-23 02:06:04,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44759326 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:06:04, skipping insertion in model container [2021-11-23 02:06:04,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:06:04" (3/3) ... [2021-11-23 02:06:04,861 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1251.c [2021-11-23 02:06:04,866 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:06:04,866 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 02:06:04,940 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:06:04,947 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 [2021-11-23 02:06:04,954 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 02:06:04,985 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 32 states have (on average 1.40625) internal successors, (45), 34 states have internal predecessors, (45), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-23 02:06:04,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 02:06:04,990 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:04,991 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:04,992 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:04,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:04,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1393628457, now seen corresponding path program 1 times [2021-11-23 02:06:05,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:06:05,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291892293] [2021-11-23 02:06:05,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:05,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:06:05,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:05,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:06:05,199 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:06:05,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291892293] [2021-11-23 02:06:05,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291892293] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:06:05,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:06:05,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:06:05,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548627971] [2021-11-23 02:06:05,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:06:05,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:06:05,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:06:05,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:06:05,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:06:05,251 INFO L87 Difference]: Start difference. First operand has 47 states, 32 states have (on average 1.40625) internal successors, (45), 34 states have internal predecessors, (45), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:06:05,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:05,377 INFO L93 Difference]: Finished difference Result 89 states and 125 transitions. [2021-11-23 02:06:05,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:06:05,380 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-11-23 02:06:05,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:05,399 INFO L225 Difference]: With dead ends: 89 [2021-11-23 02:06:05,399 INFO L226 Difference]: Without dead ends: 53 [2021-11-23 02:06:05,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:06:05,412 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 16 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:05,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 151 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:06:05,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-23 02:06:05,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2021-11-23 02:06:05,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-23 02:06:05,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2021-11-23 02:06:05,475 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 24 [2021-11-23 02:06:05,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:05,476 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2021-11-23 02:06:05,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:06:05,478 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2021-11-23 02:06:05,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 02:06:05,480 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:05,481 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:05,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:06:05,482 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:05,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:05,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1422555787, now seen corresponding path program 1 times [2021-11-23 02:06:05,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:06:05,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855735980] [2021-11-23 02:06:05,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:05,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:06:05,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:05,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:06:05,624 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:06:05,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855735980] [2021-11-23 02:06:05,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855735980] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:06:05,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:06:05,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:06:05,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276241648] [2021-11-23 02:06:05,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:06:05,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:06:05,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:06:05,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:06:05,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:06:05,631 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-23 02:06:05,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:05,673 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2021-11-23 02:06:05,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:06:05,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2021-11-23 02:06:05,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:05,675 INFO L225 Difference]: With dead ends: 49 [2021-11-23 02:06:05,675 INFO L226 Difference]: Without dead ends: 47 [2021-11-23 02:06:05,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:06:05,677 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:05,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 99 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:06:05,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-23 02:06:05,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-23 02:06:05,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-23 02:06:05,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2021-11-23 02:06:05,701 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 29 [2021-11-23 02:06:05,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:05,701 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2021-11-23 02:06:05,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-23 02:06:05,702 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2021-11-23 02:06:05,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-23 02:06:05,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:05,708 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:05,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:06:05,709 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:05,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:05,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1278819550, now seen corresponding path program 1 times [2021-11-23 02:06:05,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:06:05,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314150873] [2021-11-23 02:06:05,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:05,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:06:05,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 02:06:05,794 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 02:06:05,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 02:06:05,870 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-23 02:06:05,870 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 02:06:05,871 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-23 02:06:05,873 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-23 02:06:05,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:06:05,877 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2021-11-23 02:06:05,879 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 02:06:05,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:06:05 BoogieIcfgContainer [2021-11-23 02:06:05,910 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 02:06:05,934 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 02:06:05,934 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 02:06:05,934 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 02:06:05,935 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:06:04" (3/4) ... [2021-11-23 02:06:05,938 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-23 02:06:05,938 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 02:06:05,939 INFO L158 Benchmark]: Toolchain (without parser) took 1910.47ms. Allocated memory was 104.9MB in the beginning and 125.8MB in the end (delta: 21.0MB). Free memory was 75.8MB in the beginning and 101.3MB in the end (delta: -25.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:06:05,939 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 104.9MB. Free memory is still 75.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:06:05,954 INFO L158 Benchmark]: CACSL2BoogieTranslator took 240.31ms. Allocated memory is still 104.9MB. Free memory was 75.5MB in the beginning and 64.9MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 02:06:05,955 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.03ms. Allocated memory is still 104.9MB. Free memory was 64.9MB in the beginning and 63.1MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 02:06:05,955 INFO L158 Benchmark]: Boogie Preprocessor took 28.94ms. Allocated memory is still 104.9MB. Free memory was 63.1MB in the beginning and 61.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 02:06:05,956 INFO L158 Benchmark]: RCFGBuilder took 503.07ms. Allocated memory was 104.9MB in the beginning and 125.8MB in the end (delta: 21.0MB). Free memory was 61.7MB in the beginning and 100.9MB in the end (delta: -39.2MB). Peak memory consumption was 20.3MB. Max. memory is 16.1GB. [2021-11-23 02:06:05,957 INFO L158 Benchmark]: TraceAbstraction took 1056.40ms. Allocated memory is still 125.8MB. Free memory was 100.6MB in the beginning and 60.8MB in the end (delta: 39.8MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. [2021-11-23 02:06:05,957 INFO L158 Benchmark]: Witness Printer took 4.42ms. Allocated memory is still 125.8MB. Free memory was 101.4MB in the beginning and 101.3MB in the end (delta: 46.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:06:05,960 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 104.9MB. Free memory is still 75.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 240.31ms. Allocated memory is still 104.9MB. Free memory was 75.5MB in the beginning and 64.9MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.03ms. Allocated memory is still 104.9MB. Free memory was 64.9MB in the beginning and 63.1MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.94ms. Allocated memory is still 104.9MB. Free memory was 63.1MB in the beginning and 61.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 503.07ms. Allocated memory was 104.9MB in the beginning and 125.8MB in the end (delta: 21.0MB). Free memory was 61.7MB in the beginning and 100.9MB in the end (delta: -39.2MB). Peak memory consumption was 20.3MB. Max. memory is 16.1GB. * TraceAbstraction took 1056.40ms. Allocated memory is still 125.8MB. Free memory was 100.6MB in the beginning and 60.8MB in the end (delta: 39.8MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. * Witness Printer took 4.42ms. Allocated memory is still 125.8MB. Free memory was 101.4MB in the beginning and 101.3MB in the end (delta: 46.7kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 76]: 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 75. Possible FailurePath: [L66] float x = __VERIFIER_nondet_float(); [L67] float y = __VERIFIER_nondet_float(); [L69] CALL, EXPR isnan_float(x) VAL [\old(x)=2139095042] [L57] return x != x; [L69] RET, EXPR isnan_float(x) VAL [isnan_float(x)=1, x=2139095042] [L69] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, x=2139095042] [L69] CALL, EXPR isnan_float(y) VAL [\old(x)=2139095043] [L57] return x != x; [L69] RET, EXPR isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, x=2139095042, y=2139095043] [L69] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, x=2139095042, y=2139095043] [L69-L70] (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) VAL [(isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y))=1, isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, x=2139095042, y=2139095043] [L69-L70] COND TRUE (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) [L72] CALL, EXPR fmax_float(x, y) [L46] CALL, EXPR __fpclassify_float(x) VAL [\old(x)=2139095042] [L23] __uint32_t w; VAL [\old(x)=2139095042, x=2139095042] [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] RET, EXPR __fpclassify_float(x) VAL [\old(x)=2139095042, \old(y)=2139095043, __fpclassify_float(x)=0, x=2139095042, y=2139095043] [L46] COND TRUE __fpclassify_float(x) == 0 [L47] return y; VAL [\old(x)=2139095042, \old(y)=2139095043, \result=2139095043, x=2139095042, y=2139095043] [L72] RET, EXPR fmax_float(x, y) [L72] float res = fmax_float(x, y); [L75] CALL, EXPR isnan_float(x) VAL [\old(x)=2139095042] [L57] return x != x; [L75] RET, EXPR isnan_float(x) VAL [isnan_float(x)=1, res=2139095043, x=2139095042, y=2139095043] [L75] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, res=2139095043, x=2139095042, y=2139095043] [L75] CALL, EXPR isnan_float(y) VAL [\old(x)=2139095043] [L57] return x != x; [L75] RET, EXPR isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, res=2139095043, x=2139095042, y=2139095043] [L75] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, res=2139095043, x=2139095042, y=2139095043] [L75] COND TRUE isnan_float(x) && !isnan_float(y) && res != y [L76] reach_error() VAL [res=2139095043, x=2139095042, y=2139095043] - UnprovableResult [Line: 82]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 47 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.9s, OverallIterations: 3, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 18 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 16 mSDsluCounter, 250 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 151 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 46 IncrementalHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 110 mSDtfsCounter, 46 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=0, InterpolantAutomatonStates: 8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 2 MinimizatonAttempts, 7 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 86 NumberOfCodeBlocks, 86 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 51 ConstructedInterpolants, 0 QuantifiedInterpolants, 54 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 8/8 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 [2021-11-23 02:06:06,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1251.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V --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 de540e539c3db6027c1fdb04fcc6cae02aafb8aa58950d31054b2b0b8391af6d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:06:08,370 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:06:08,372 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:06:08,408 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:06:08,408 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:06:08,410 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:06:08,411 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:06:08,414 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:06:08,416 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:06:08,417 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:06:08,418 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:06:08,420 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:06:08,420 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:06:08,421 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:06:08,423 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:06:08,424 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:06:08,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:06:08,426 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:06:08,428 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:06:08,431 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:06:08,432 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:06:08,434 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:06:08,441 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:06:08,442 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:06:08,446 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:06:08,451 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:06:08,451 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:06:08,454 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:06:08,455 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:06:08,460 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:06:08,460 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:06:08,461 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:06:08,462 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:06:08,463 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:06:08,465 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:06:08,466 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:06:08,468 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:06:08,468 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:06:08,469 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:06:08,470 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:06:08,472 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:06:08,472 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 02:06:08,516 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:06:08,516 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:06:08,517 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:06:08,517 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:06:08,518 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:06:08,518 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:06:08,519 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:06:08,519 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:06:08,519 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:06:08,519 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:06:08,520 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:06:08,520 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:06:08,522 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:06:08,522 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:06:08,522 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:06:08,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:06:08,523 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:06:08,523 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:06:08,523 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:06:08,523 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 02:06:08,524 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 02:06:08,524 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 02:06:08,524 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:06:08,524 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:06:08,524 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:06:08,525 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:06:08,525 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:06:08,525 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 02:06:08,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:06:08,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:06:08,526 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:06:08,526 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:06:08,527 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:06:08,527 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 02:06:08,527 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 02:06:08,527 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:06:08,527 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:06:08,528 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:06:08,528 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_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de540e539c3db6027c1fdb04fcc6cae02aafb8aa58950d31054b2b0b8391af6d [2021-11-23 02:06:08,953 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:06:08,984 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:06:08,988 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:06:08,989 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:06:08,989 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:06:08,991 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/float-newlib/float_req_bl_1251.c [2021-11-23 02:06:09,060 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/data/db56d5aa4/44215cfbe79c4f75937acf60e3100ad1/FLAG3ee36da81 [2021-11-23 02:06:09,642 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:06:09,645 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/sv-benchmarks/c/float-newlib/float_req_bl_1251.c [2021-11-23 02:06:09,653 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/data/db56d5aa4/44215cfbe79c4f75937acf60e3100ad1/FLAG3ee36da81 [2021-11-23 02:06:09,995 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/data/db56d5aa4/44215cfbe79c4f75937acf60e3100ad1 [2021-11-23 02:06:09,997 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:06:09,999 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:06:10,000 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:06:10,001 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:06:10,004 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:06:10,006 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:06:09" (1/1) ... [2021-11-23 02:06:10,009 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73a4d4ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:10, skipping insertion in model container [2021-11-23 02:06:10,009 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:06:09" (1/1) ... [2021-11-23 02:06:10,016 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:06:10,041 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:06:10,194 WARN L230 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_47772e56-0450-483b-a47a-7102c09024ab/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[1980,1993] [2021-11-23 02:06:10,197 WARN L230 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_47772e56-0450-483b-a47a-7102c09024ab/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[2139,2152] [2021-11-23 02:06:10,199 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:06:10,210 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:06:10,257 WARN L230 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_47772e56-0450-483b-a47a-7102c09024ab/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[1980,1993] [2021-11-23 02:06:10,259 WARN L230 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_47772e56-0450-483b-a47a-7102c09024ab/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[2139,2152] [2021-11-23 02:06:10,260 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:06:10,276 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:06:10,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:10 WrapperNode [2021-11-23 02:06:10,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:06:10,278 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:06:10,278 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:06:10,278 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:06:10,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:10" (1/1) ... [2021-11-23 02:06:10,296 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:10" (1/1) ... [2021-11-23 02:06:10,317 INFO L137 Inliner]: procedures = 21, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 98 [2021-11-23 02:06:10,317 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:06:10,318 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:06:10,318 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:06:10,318 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:06:10,326 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:10" (1/1) ... [2021-11-23 02:06:10,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:10" (1/1) ... [2021-11-23 02:06:10,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:10" (1/1) ... [2021-11-23 02:06:10,331 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:10" (1/1) ... [2021-11-23 02:06:10,340 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:10" (1/1) ... [2021-11-23 02:06:10,345 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:10" (1/1) ... [2021-11-23 02:06:10,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:10" (1/1) ... [2021-11-23 02:06:10,351 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:06:10,352 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:06:10,352 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:06:10,352 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:06:10,353 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:10" (1/1) ... [2021-11-23 02:06:10,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:06:10,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:06:10,390 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:06:10,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:06:10,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:06:10,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 02:06:10,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:06:10,438 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2021-11-23 02:06:10,439 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2021-11-23 02:06:10,439 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2021-11-23 02:06:10,439 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2021-11-23 02:06:10,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 02:06:10,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:06:10,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:06:10,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2021-11-23 02:06:10,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:06:10,567 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:06:10,571 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:06:10,844 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:06:10,851 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:06:10,851 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 02:06:10,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:06:10 BoogieIcfgContainer [2021-11-23 02:06:10,854 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:06:10,855 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:06:10,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:06:10,859 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:06:10,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:06:09" (1/3) ... [2021-11-23 02:06:10,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ab8dc53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:06:10, skipping insertion in model container [2021-11-23 02:06:10,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:10" (2/3) ... [2021-11-23 02:06:10,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ab8dc53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:06:10, skipping insertion in model container [2021-11-23 02:06:10,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:06:10" (3/3) ... [2021-11-23 02:06:10,862 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1251.c [2021-11-23 02:06:10,867 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:06:10,868 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 02:06:10,917 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:06:10,924 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 [2021-11-23 02:06:10,924 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 02:06:10,954 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 40 states have (on average 1.475) internal successors, (59), 42 states have internal predecessors, (59), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-23 02:06:10,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 02:06:10,962 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:10,963 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:10,963 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:10,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:10,974 INFO L85 PathProgramCache]: Analyzing trace with hash 956195031, now seen corresponding path program 1 times [2021-11-23 02:06:10,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:06:10,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [263285425] [2021-11-23 02:06:10,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:10,987 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:06:10,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:06:10,996 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:06:11,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 02:06:11,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:11,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 02:06:11,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:11,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:06:11,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:11,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 02:06:11,340 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:06:11,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [263285425] [2021-11-23 02:06:11,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [263285425] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:06:11,342 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:06:11,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-23 02:06:11,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061730815] [2021-11-23 02:06:11,345 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:06:11,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 02:06:11,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:06:11,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 02:06:11,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:06:11,388 INFO L87 Difference]: Start difference. First operand has 55 states, 40 states have (on average 1.475) internal successors, (59), 42 states have internal predecessors, (59), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 02:06:11,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:11,425 INFO L93 Difference]: Finished difference Result 93 states and 134 transitions. [2021-11-23 02:06:11,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 02:06:11,428 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2021-11-23 02:06:11,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:11,437 INFO L225 Difference]: With dead ends: 93 [2021-11-23 02:06:11,437 INFO L226 Difference]: Without dead ends: 51 [2021-11-23 02:06:11,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:06:11,446 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:11,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:06:11,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-23 02:06:11,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-23 02:06:11,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 38 states have internal predecessors, (50), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-23 02:06:11,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2021-11-23 02:06:11,496 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 27 [2021-11-23 02:06:11,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:11,498 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2021-11-23 02:06:11,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 02:06:11,498 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2021-11-23 02:06:11,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 02:06:11,501 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:11,501 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:11,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:11,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:06:11,714 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:11,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:11,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1128254016, now seen corresponding path program 1 times [2021-11-23 02:06:11,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:06:11,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1736216357] [2021-11-23 02:06:11,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:11,717 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:06:11,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:06:11,718 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:06:11,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 02:06:11,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:11,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:06:11,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:11,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:06:11,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:11,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 02:06:11,950 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:06:11,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1736216357] [2021-11-23 02:06:11,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1736216357] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:06:11,951 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:06:11,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-23 02:06:11,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902095869] [2021-11-23 02:06:11,952 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:06:11,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:06:11,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:06:11,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:06:11,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:06:11,955 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 02:06:12,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:12,015 INFO L93 Difference]: Finished difference Result 96 states and 131 transitions. [2021-11-23 02:06:12,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:06:12,016 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 28 [2021-11-23 02:06:12,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:12,019 INFO L225 Difference]: With dead ends: 96 [2021-11-23 02:06:12,020 INFO L226 Difference]: Without dead ends: 60 [2021-11-23 02:06:12,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:06:12,024 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 16 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:12,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 191 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:06:12,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-23 02:06:12,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2021-11-23 02:06:12,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 40 states have internal predecessors, (52), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-23 02:06:12,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2021-11-23 02:06:12,048 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 72 transitions. Word has length 28 [2021-11-23 02:06:12,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:12,048 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 72 transitions. [2021-11-23 02:06:12,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 02:06:12,049 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 72 transitions. [2021-11-23 02:06:12,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-23 02:06:12,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:12,050 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:12,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-23 02:06:12,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:06:12,251 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:12,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:12,252 INFO L85 PathProgramCache]: Analyzing trace with hash 987158491, now seen corresponding path program 1 times [2021-11-23 02:06:12,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:06:12,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1950750740] [2021-11-23 02:06:12,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:12,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:06:12,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:06:12,254 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:06:12,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 02:06:12,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:12,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:06:12,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:12,452 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 02:06:12,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:12,549 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 02:06:12,550 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:06:12,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1950750740] [2021-11-23 02:06:12,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1950750740] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:06:12,550 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:06:12,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-23 02:06:12,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544669245] [2021-11-23 02:06:12,551 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:06:12,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:06:12,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:06:12,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:06:12,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:06:12,553 INFO L87 Difference]: Start difference. First operand 53 states and 72 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 02:06:12,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:12,605 INFO L93 Difference]: Finished difference Result 79 states and 106 transitions. [2021-11-23 02:06:12,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:06:12,606 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 33 [2021-11-23 02:06:12,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:12,610 INFO L225 Difference]: With dead ends: 79 [2021-11-23 02:06:12,611 INFO L226 Difference]: Without dead ends: 59 [2021-11-23 02:06:12,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:06:12,616 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 0 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:12,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 330 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:06:12,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-23 02:06:12,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2021-11-23 02:06:12,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 42 states have internal predecessors, (54), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2021-11-23 02:06:12,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 76 transitions. [2021-11-23 02:06:12,641 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 76 transitions. Word has length 33 [2021-11-23 02:06:12,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:12,642 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 76 transitions. [2021-11-23 02:06:12,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 02:06:12,643 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 76 transitions. [2021-11-23 02:06:12,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 02:06:12,650 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:12,650 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:12,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-23 02:06:12,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:06:12,863 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:12,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:12,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1662589572, now seen corresponding path program 1 times [2021-11-23 02:06:12,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:06:12,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1885006324] [2021-11-23 02:06:12,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:12,865 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:06:12,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:06:12,866 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:06:12,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 02:06:12,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:12,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:06:12,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:13,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 02:06:13,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:13,722 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 02:06:13,722 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:06:13,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1885006324] [2021-11-23 02:06:13,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1885006324] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:06:13,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [420835564] [2021-11-23 02:06:13,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:13,724 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:06:13,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:06:13,729 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:06:13,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-23 02:06:13,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:13,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:06:13,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:13,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 02:06:13,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:14,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 02:06:14,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [420835564] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:06:14,028 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:06:14,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8, 9] total 14 [2021-11-23 02:06:14,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443913959] [2021-11-23 02:06:14,028 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:06:14,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:06:14,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:06:14,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:06:14,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:06:14,031 INFO L87 Difference]: Start difference. First operand 56 states and 76 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-23 02:06:14,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:14,044 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2021-11-23 02:06:14,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:06:14,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 36 [2021-11-23 02:06:14,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:14,047 INFO L225 Difference]: With dead ends: 59 [2021-11-23 02:06:14,047 INFO L226 Difference]: Without dead ends: 57 [2021-11-23 02:06:14,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:06:14,048 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 0 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:14,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 132 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:06:14,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-23 02:06:14,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-11-23 02:06:14,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 43 states have internal predecessors, (55), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2021-11-23 02:06:14,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 77 transitions. [2021-11-23 02:06:14,056 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 77 transitions. Word has length 36 [2021-11-23 02:06:14,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:14,057 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 77 transitions. [2021-11-23 02:06:14,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-23 02:06:14,057 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 77 transitions. [2021-11-23 02:06:14,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-23 02:06:14,059 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:14,059 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:14,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:14,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2021-11-23 02:06:14,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:06:14,471 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:14,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:14,471 INFO L85 PathProgramCache]: Analyzing trace with hash -490349503, now seen corresponding path program 1 times [2021-11-23 02:06:14,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:06:14,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1896376541] [2021-11-23 02:06:14,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:14,472 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:06:14,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:06:14,473 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:06:14,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 02:06:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:14,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:06:14,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:15,295 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:06:15,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:15,598 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:06:15,598 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:06:15,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1896376541] [2021-11-23 02:06:15,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1896376541] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:06:15,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2053846161] [2021-11-23 02:06:15,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:15,599 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:06:15,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:06:15,602 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:06:15,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-23 02:06:15,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:15,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:06:15,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:16,211 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:06:16,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:16,373 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:06:16,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2053846161] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:06:16,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303151446] [2021-11-23 02:06:16,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:16,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:16,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:06:16,378 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:06:16,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 02:06:16,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:16,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 02:06:16,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:16,943 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:06:16,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:17,347 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:06:17,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303151446] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:06:17,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-23 02:06:17,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 9, 9, 9, 10] total 28 [2021-11-23 02:06:17,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545251795] [2021-11-23 02:06:17,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:06:17,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:06:17,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:06:17,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:06:17,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-11-23 02:06:17,350 INFO L87 Difference]: Start difference. First operand 57 states and 77 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-23 02:06:18,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:18,119 INFO L93 Difference]: Finished difference Result 75 states and 100 transitions. [2021-11-23 02:06:18,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 02:06:18,119 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2021-11-23 02:06:18,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:18,121 INFO L225 Difference]: With dead ends: 75 [2021-11-23 02:06:18,121 INFO L226 Difference]: Without dead ends: 73 [2021-11-23 02:06:18,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 02:06:18,122 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 52 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:18,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 333 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:06:18,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-23 02:06:18,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2021-11-23 02:06:18,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 47 states have internal predecessors, (60), 12 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (14), 13 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-23 02:06:18,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 86 transitions. [2021-11-23 02:06:18,131 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 86 transitions. Word has length 41 [2021-11-23 02:06:18,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:18,132 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 86 transitions. [2021-11-23 02:06:18,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-23 02:06:18,132 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 86 transitions. [2021-11-23 02:06:18,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-23 02:06:18,134 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:18,134 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:18,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-23 02:06:18,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:18,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:18,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:06:18,751 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:18,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:18,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1869413518, now seen corresponding path program 1 times [2021-11-23 02:06:18,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:06:18,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1590358590] [2021-11-23 02:06:18,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:18,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:06:18,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:06:18,755 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:06:18,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 02:06:18,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:18,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:06:18,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:19,085 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 02:06:19,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:19,423 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:06:19,423 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:06:19,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1590358590] [2021-11-23 02:06:19,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1590358590] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:06:19,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [708960036] [2021-11-23 02:06:19,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:19,424 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:06:19,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:06:19,426 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:06:19,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-23 02:06:19,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:19,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:06:19,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:19,635 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 02:06:19,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:19,695 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 02:06:19,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [708960036] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:06:19,696 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:06:19,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8, 9] total 14 [2021-11-23 02:06:19,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722093222] [2021-11-23 02:06:19,696 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:06:19,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:06:19,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:06:19,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:06:19,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:06:19,698 INFO L87 Difference]: Start difference. First operand 63 states and 86 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-23 02:06:19,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:19,716 INFO L93 Difference]: Finished difference Result 66 states and 88 transitions. [2021-11-23 02:06:19,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:06:19,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 43 [2021-11-23 02:06:19,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:19,720 INFO L225 Difference]: With dead ends: 66 [2021-11-23 02:06:19,721 INFO L226 Difference]: Without dead ends: 63 [2021-11-23 02:06:19,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:06:19,725 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:19,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 134 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:06:19,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-23 02:06:19,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-11-23 02:06:19,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 47 states have internal predecessors, (59), 12 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (14), 13 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-23 02:06:19,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2021-11-23 02:06:19,748 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 43 [2021-11-23 02:06:19,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:19,749 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2021-11-23 02:06:19,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-23 02:06:19,750 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2021-11-23 02:06:19,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-23 02:06:19,754 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:19,754 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:19,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:19,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:20,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:06:20,156 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:20,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:20,157 INFO L85 PathProgramCache]: Analyzing trace with hash 972082008, now seen corresponding path program 1 times [2021-11-23 02:06:20,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:06:20,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1699726894] [2021-11-23 02:06:20,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:20,158 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:06:20,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:06:20,158 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:06:20,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 02:06:20,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:20,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:06:20,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:20,291 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:06:20,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:20,400 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 02:06:20,401 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:06:20,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1699726894] [2021-11-23 02:06:20,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1699726894] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:06:20,401 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:06:20,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-23 02:06:20,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447924573] [2021-11-23 02:06:20,402 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:06:20,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:06:20,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:06:20,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:06:20,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:06:20,404 INFO L87 Difference]: Start difference. First operand 63 states and 85 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-23 02:06:20,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:20,432 INFO L93 Difference]: Finished difference Result 88 states and 116 transitions. [2021-11-23 02:06:20,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:06:20,433 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) Word has length 46 [2021-11-23 02:06:20,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:20,439 INFO L225 Difference]: With dead ends: 88 [2021-11-23 02:06:20,439 INFO L226 Difference]: Without dead ends: 67 [2021-11-23 02:06:20,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:06:20,440 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:20,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 263 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:06:20,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-23 02:06:20,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2021-11-23 02:06:20,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 47 states have internal predecessors, (60), 12 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (14), 14 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-23 02:06:20,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 86 transitions. [2021-11-23 02:06:20,466 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 86 transitions. Word has length 46 [2021-11-23 02:06:20,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:20,467 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 86 transitions. [2021-11-23 02:06:20,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-23 02:06:20,467 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 86 transitions. [2021-11-23 02:06:20,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-23 02:06:20,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:20,470 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:20,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:20,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:06:20,682 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:20,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:20,682 INFO L85 PathProgramCache]: Analyzing trace with hash -877982242, now seen corresponding path program 1 times [2021-11-23 02:06:20,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:06:20,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1257727459] [2021-11-23 02:06:20,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:20,683 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:06:20,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:06:20,685 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:06:20,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 02:06:20,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:20,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:06:20,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:20,959 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:06:20,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:21,619 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 02:06:21,619 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:06:21,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1257727459] [2021-11-23 02:06:21,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1257727459] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:06:21,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [700177535] [2021-11-23 02:06:21,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:21,620 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:06:21,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:06:21,622 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:06:21,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-23 02:06:21,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:21,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 02:06:21,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:22,017 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:06:22,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:22,268 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 02:06:22,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [700177535] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:06:22,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183210455] [2021-11-23 02:06:22,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:22,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:22,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:06:22,274 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:06:22,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 02:06:22,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:22,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:06:22,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:22,646 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:06:22,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:23,172 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 02:06:23,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183210455] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:06:23,172 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:06:23,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 18 [2021-11-23 02:06:23,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557797357] [2021-11-23 02:06:23,173 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:06:23,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 02:06:23,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:06:23,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 02:06:23,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-11-23 02:06:23,175 INFO L87 Difference]: Start difference. First operand 64 states and 86 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 15 states have internal predecessors, (59), 9 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (19), 11 states have call predecessors, (19), 9 states have call successors, (19) [2021-11-23 02:06:23,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:23,542 INFO L93 Difference]: Finished difference Result 108 states and 145 transitions. [2021-11-23 02:06:23,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 02:06:23,542 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 15 states have internal predecessors, (59), 9 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (19), 11 states have call predecessors, (19), 9 states have call successors, (19) Word has length 48 [2021-11-23 02:06:23,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:23,544 INFO L225 Difference]: With dead ends: 108 [2021-11-23 02:06:23,544 INFO L226 Difference]: Without dead ends: 86 [2021-11-23 02:06:23,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-11-23 02:06:23,545 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 68 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:23,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 455 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 114 Invalid, 0 Unknown, 112 Unchecked, 0.2s Time] [2021-11-23 02:06:23,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-23 02:06:23,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 77. [2021-11-23 02:06:23,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 57 states have (on average 1.263157894736842) internal successors, (72), 55 states have internal predecessors, (72), 15 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (19), 19 states have call predecessors, (19), 15 states have call successors, (19) [2021-11-23 02:06:23,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 106 transitions. [2021-11-23 02:06:23,555 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 106 transitions. Word has length 48 [2021-11-23 02:06:23,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:23,555 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 106 transitions. [2021-11-23 02:06:23,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 15 states have internal predecessors, (59), 9 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (19), 11 states have call predecessors, (19), 9 states have call successors, (19) [2021-11-23 02:06:23,555 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 106 transitions. [2021-11-23 02:06:23,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-23 02:06:23,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:23,556 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:23,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:23,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:23,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:24,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:24,169 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:24,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:24,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1899050596, now seen corresponding path program 1 times [2021-11-23 02:06:24,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:06:24,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1176948885] [2021-11-23 02:06:24,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:24,170 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:06:24,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:06:24,174 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:06:24,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 02:06:24,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:24,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:06:24,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:24,646 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-23 02:06:24,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:25,667 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-23 02:06:25,667 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:06:25,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1176948885] [2021-11-23 02:06:25,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1176948885] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:06:25,667 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:06:25,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 17 [2021-11-23 02:06:25,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199566963] [2021-11-23 02:06:25,668 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:06:25,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 02:06:25,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:06:25,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 02:06:25,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-11-23 02:06:25,669 INFO L87 Difference]: Start difference. First operand 77 states and 106 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 5 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-23 02:06:26,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:26,606 INFO L93 Difference]: Finished difference Result 125 states and 165 transitions. [2021-11-23 02:06:26,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 02:06:26,607 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 5 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) Word has length 48 [2021-11-23 02:06:26,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:26,608 INFO L225 Difference]: With dead ends: 125 [2021-11-23 02:06:26,608 INFO L226 Difference]: Without dead ends: 123 [2021-11-23 02:06:26,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-11-23 02:06:26,610 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 119 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:26,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 598 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 02:06:26,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-23 02:06:26,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 84. [2021-11-23 02:06:26,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 63 states have (on average 1.253968253968254) internal successors, (79), 60 states have internal predecessors, (79), 15 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (23), 21 states have call predecessors, (23), 15 states have call successors, (23) [2021-11-23 02:06:26,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 117 transitions. [2021-11-23 02:06:26,621 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 117 transitions. Word has length 48 [2021-11-23 02:06:26,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:26,622 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 117 transitions. [2021-11-23 02:06:26,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 5 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-23 02:06:26,622 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 117 transitions. [2021-11-23 02:06:26,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-23 02:06:26,623 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:26,624 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:26,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:26,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:06:26,829 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:26,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:26,830 INFO L85 PathProgramCache]: Analyzing trace with hash 2112773896, now seen corresponding path program 1 times [2021-11-23 02:06:26,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:06:26,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [106311955] [2021-11-23 02:06:26,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:26,831 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:06:26,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:06:26,832 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:06:26,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 02:06:26,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:26,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:06:26,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:27,139 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:06:27,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:27,468 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 02:06:27,482 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:06:27,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [106311955] [2021-11-23 02:06:27,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [106311955] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:06:27,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1869372264] [2021-11-23 02:06:27,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:27,482 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:06:27,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:06:27,483 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:06:27,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-23 02:06:27,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:27,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:06:27,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:28,144 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 02:06:28,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:28,566 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 02:06:28,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1869372264] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:06:28,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36114526] [2021-11-23 02:06:28,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:28,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:28,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:06:28,570 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:06:28,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 02:06:28,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:28,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 02:06:28,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:28,996 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:06:28,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:29,370 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 02:06:29,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36114526] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:06:29,371 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:06:29,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9, 10, 12, 12] total 27 [2021-11-23 02:06:29,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319757158] [2021-11-23 02:06:29,371 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:06:29,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-23 02:06:29,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:06:29,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-23 02:06:29,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-11-23 02:06:29,373 INFO L87 Difference]: Start difference. First operand 84 states and 117 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 17 states have internal predecessors, (67), 4 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (21), 14 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-23 02:06:31,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:31,335 INFO L93 Difference]: Finished difference Result 169 states and 231 transitions. [2021-11-23 02:06:31,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-23 02:06:31,336 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 17 states have internal predecessors, (67), 4 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (21), 14 states have call predecessors, (21), 4 states have call successors, (21) Word has length 48 [2021-11-23 02:06:31,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:31,337 INFO L225 Difference]: With dead ends: 169 [2021-11-23 02:06:31,338 INFO L226 Difference]: Without dead ends: 136 [2021-11-23 02:06:31,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=268, Invalid=1454, Unknown=0, NotChecked=0, Total=1722 [2021-11-23 02:06:31,339 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 213 mSDsluCounter, 1266 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:31,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 1341 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 02:06:31,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-23 02:06:31,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 115. [2021-11-23 02:06:31,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 86 states have (on average 1.2093023255813953) internal successors, (104), 82 states have internal predecessors, (104), 23 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (34), 30 states have call predecessors, (34), 23 states have call successors, (34) [2021-11-23 02:06:31,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 161 transitions. [2021-11-23 02:06:31,354 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 161 transitions. Word has length 48 [2021-11-23 02:06:31,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:31,355 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 161 transitions. [2021-11-23 02:06:31,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 17 states have internal predecessors, (67), 4 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (21), 14 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-23 02:06:31,355 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 161 transitions. [2021-11-23 02:06:31,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-23 02:06:31,357 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:31,357 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:31,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:31,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:31,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:31,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:06:31,985 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:31,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:31,986 INFO L85 PathProgramCache]: Analyzing trace with hash 113915812, now seen corresponding path program 1 times [2021-11-23 02:06:31,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:06:31,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [211803641] [2021-11-23 02:06:31,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:31,987 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:06:31,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:06:31,987 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:06:31,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 02:06:32,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:32,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 02:06:32,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:32,556 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 02:06:32,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:32,849 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 02:06:32,849 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:06:32,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [211803641] [2021-11-23 02:06:32,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [211803641] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:06:32,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [5633806] [2021-11-23 02:06:32,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:32,850 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:06:32,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:06:32,851 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:06:32,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-23 02:06:33,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:33,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 02:06:33,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:33,502 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 02:06:33,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:33,679 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 02:06:33,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [5633806] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:06:33,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852746106] [2021-11-23 02:06:33,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:33,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:33,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:06:33,681 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:06:33,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-23 02:06:33,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:33,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 02:06:33,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:34,207 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:06:34,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:34,531 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 02:06:34,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852746106] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:06:34,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:06:34,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10, 10, 14, 13] total 24 [2021-11-23 02:06:34,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735367776] [2021-11-23 02:06:34,532 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:06:34,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 02:06:34,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:06:34,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 02:06:34,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-11-23 02:06:34,534 INFO L87 Difference]: Start difference. First operand 115 states and 161 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 19 states have internal predecessors, (54), 5 states have call successors, (10), 1 states have call predecessors, (10), 4 states have return successors, (14), 10 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-23 02:06:35,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:35,362 INFO L93 Difference]: Finished difference Result 128 states and 174 transitions. [2021-11-23 02:06:35,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 02:06:35,363 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 19 states have internal predecessors, (54), 5 states have call successors, (10), 1 states have call predecessors, (10), 4 states have return successors, (14), 10 states have call predecessors, (14), 5 states have call successors, (14) Word has length 49 [2021-11-23 02:06:35,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:35,365 INFO L225 Difference]: With dead ends: 128 [2021-11-23 02:06:35,365 INFO L226 Difference]: Without dead ends: 116 [2021-11-23 02:06:35,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 02:06:35,367 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 118 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:35,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 837 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:06:35,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-23 02:06:35,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2021-11-23 02:06:35,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 83 states have (on average 1.2048192771084338) internal successors, (100), 80 states have internal predecessors, (100), 23 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (33), 29 states have call predecessors, (33), 23 states have call successors, (33) [2021-11-23 02:06:35,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 156 transitions. [2021-11-23 02:06:35,384 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 156 transitions. Word has length 49 [2021-11-23 02:06:35,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:35,384 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 156 transitions. [2021-11-23 02:06:35,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 19 states have internal predecessors, (54), 5 states have call successors, (10), 1 states have call predecessors, (10), 4 states have return successors, (14), 10 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-23 02:06:35,385 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 156 transitions. [2021-11-23 02:06:35,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-23 02:06:35,386 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:35,386 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:35,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:35,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:35,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:35,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:06:35,995 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:35,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:35,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1549749125, now seen corresponding path program 1 times [2021-11-23 02:06:35,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:06:35,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1695698391] [2021-11-23 02:06:35,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:35,996 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:06:35,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:06:35,997 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:06:36,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-23 02:06:36,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:36,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 02:06:36,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:36,808 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 02:06:36,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:38,230 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 02:06:38,231 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:06:38,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1695698391] [2021-11-23 02:06:38,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1695698391] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:06:38,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:06:38,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [14] total 24 [2021-11-23 02:06:38,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571669584] [2021-11-23 02:06:38,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:06:38,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 02:06:38,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:06:38,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 02:06:38,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-11-23 02:06:38,234 INFO L87 Difference]: Start difference. First operand 112 states and 156 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-23 02:06:39,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:39,065 INFO L93 Difference]: Finished difference Result 130 states and 181 transitions. [2021-11-23 02:06:39,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 02:06:39,066 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 49 [2021-11-23 02:06:39,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:39,069 INFO L225 Difference]: With dead ends: 130 [2021-11-23 02:06:39,070 INFO L226 Difference]: Without dead ends: 113 [2021-11-23 02:06:39,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 02:06:39,072 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 69 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:39,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 644 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 362 Invalid, 0 Unknown, 71 Unchecked, 0.4s Time] [2021-11-23 02:06:39,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-23 02:06:39,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 100. [2021-11-23 02:06:39,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 72 states have internal predecessors, (91), 19 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (27), 25 states have call predecessors, (27), 19 states have call successors, (27) [2021-11-23 02:06:39,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 137 transitions. [2021-11-23 02:06:39,099 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 137 transitions. Word has length 49 [2021-11-23 02:06:39,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:39,100 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 137 transitions. [2021-11-23 02:06:39,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-23 02:06:39,101 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 137 transitions. [2021-11-23 02:06:39,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-23 02:06:39,102 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:39,102 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:39,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:39,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:06:39,315 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:39,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:39,315 INFO L85 PathProgramCache]: Analyzing trace with hash -250451865, now seen corresponding path program 1 times [2021-11-23 02:06:39,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:06:39,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1087827089] [2021-11-23 02:06:39,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:39,316 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:06:39,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:06:39,317 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:06:39,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-23 02:06:39,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:39,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:06:39,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:39,550 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:06:39,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:39,783 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 02:06:39,783 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:06:39,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1087827089] [2021-11-23 02:06:39,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1087827089] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:06:39,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:06:39,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 12 [2021-11-23 02:06:39,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884016152] [2021-11-23 02:06:39,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:06:39,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:06:39,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:06:39,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:06:39,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:06:39,785 INFO L87 Difference]: Start difference. First operand 100 states and 137 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-23 02:06:40,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:40,061 INFO L93 Difference]: Finished difference Result 174 states and 232 transitions. [2021-11-23 02:06:40,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 02:06:40,061 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 50 [2021-11-23 02:06:40,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:40,062 INFO L225 Difference]: With dead ends: 174 [2021-11-23 02:06:40,063 INFO L226 Difference]: Without dead ends: 116 [2021-11-23 02:06:40,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-11-23 02:06:40,064 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 54 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:40,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 358 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:06:40,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-23 02:06:40,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 100. [2021-11-23 02:06:40,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 75 states have (on average 1.2) internal successors, (90), 72 states have internal predecessors, (90), 19 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (27), 25 states have call predecessors, (27), 19 states have call successors, (27) [2021-11-23 02:06:40,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 136 transitions. [2021-11-23 02:06:40,074 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 136 transitions. Word has length 50 [2021-11-23 02:06:40,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:40,074 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 136 transitions. [2021-11-23 02:06:40,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-23 02:06:40,075 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 136 transitions. [2021-11-23 02:06:40,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-23 02:06:40,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:40,076 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:40,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:40,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:06:40,288 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:40,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:40,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1451512262, now seen corresponding path program 1 times [2021-11-23 02:06:40,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:06:40,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1225586982] [2021-11-23 02:06:40,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:40,289 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:06:40,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:06:40,289 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:06:40,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 02:06:40,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:40,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 02:06:40,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:41,019 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:06:41,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:42,434 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-23 02:06:42,434 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:06:42,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1225586982] [2021-11-23 02:06:42,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1225586982] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:06:42,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [34239810] [2021-11-23 02:06:42,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:42,435 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:06:42,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:06:42,437 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:06:42,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-23 02:06:42,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:42,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 02:06:42,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:42,990 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:06:42,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:43,950 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-23 02:06:43,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [34239810] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:06:43,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144061070] [2021-11-23 02:06:43,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:43,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:43,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:06:43,954 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:06:43,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-23 02:06:44,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:44,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-23 02:06:44,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:44,573 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:06:44,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:46,286 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-23 02:06:46,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144061070] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:06:46,287 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:06:46,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 16, 13] total 32 [2021-11-23 02:06:46,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538555701] [2021-11-23 02:06:46,287 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:06:46,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-23 02:06:46,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:06:46,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-23 02:06:46,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-11-23 02:06:46,289 INFO L87 Difference]: Start difference. First operand 100 states and 136 transitions. Second operand has 32 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 26 states have internal predecessors, (71), 7 states have call successors, (16), 2 states have call predecessors, (16), 7 states have return successors, (22), 10 states have call predecessors, (22), 7 states have call successors, (22) [2021-11-23 02:06:47,751 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 02:06:49,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:49,102 INFO L93 Difference]: Finished difference Result 217 states and 303 transitions. [2021-11-23 02:06:49,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-23 02:06:49,102 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 26 states have internal predecessors, (71), 7 states have call successors, (16), 2 states have call predecessors, (16), 7 states have return successors, (22), 10 states have call predecessors, (22), 7 states have call successors, (22) Word has length 55 [2021-11-23 02:06:49,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:49,104 INFO L225 Difference]: With dead ends: 217 [2021-11-23 02:06:49,104 INFO L226 Difference]: Without dead ends: 146 [2021-11-23 02:06:49,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 291 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=302, Invalid=1954, Unknown=0, NotChecked=0, Total=2256 [2021-11-23 02:06:49,106 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 102 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:49,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 1084 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 910 Invalid, 0 Unknown, 161 Unchecked, 2.0s Time] [2021-11-23 02:06:49,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-23 02:06:49,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 102. [2021-11-23 02:06:49,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 75 states have internal predecessors, (90), 20 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (28), 24 states have call predecessors, (28), 20 states have call successors, (28) [2021-11-23 02:06:49,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 138 transitions. [2021-11-23 02:06:49,128 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 138 transitions. Word has length 55 [2021-11-23 02:06:49,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:49,129 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 138 transitions. [2021-11-23 02:06:49,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 26 states have internal predecessors, (71), 7 states have call successors, (16), 2 states have call predecessors, (16), 7 states have return successors, (22), 10 states have call predecessors, (22), 7 states have call successors, (22) [2021-11-23 02:06:49,129 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 138 transitions. [2021-11-23 02:06:49,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-23 02:06:49,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:49,131 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:49,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:49,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:49,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:49,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:06:49,749 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:49,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:49,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1847293526, now seen corresponding path program 1 times [2021-11-23 02:06:49,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:06:49,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1170194520] [2021-11-23 02:06:49,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:49,750 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:06:49,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:06:49,751 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:06:49,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-23 02:06:49,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:49,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 02:06:49,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:50,000 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:06:50,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:50,318 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 02:06:50,318 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:06:50,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1170194520] [2021-11-23 02:06:50,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1170194520] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:06:50,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2129338842] [2021-11-23 02:06:50,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:50,319 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:06:50,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:06:50,320 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:06:50,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-23 02:06:50,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:50,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:06:50,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:50,532 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 02:06:50,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:50,643 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 02:06:50,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2129338842] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:06:50,644 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:06:50,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [9, 10] total 14 [2021-11-23 02:06:50,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407456117] [2021-11-23 02:06:50,644 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:06:50,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:06:50,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:06:50,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:06:50,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:06:50,646 INFO L87 Difference]: Start difference. First operand 102 states and 138 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-23 02:06:50,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:50,673 INFO L93 Difference]: Finished difference Result 151 states and 196 transitions. [2021-11-23 02:06:50,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:06:50,674 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 56 [2021-11-23 02:06:50,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:50,675 INFO L225 Difference]: With dead ends: 151 [2021-11-23 02:06:50,675 INFO L226 Difference]: Without dead ends: 98 [2021-11-23 02:06:50,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-11-23 02:06:50,677 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 4 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:50,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 183 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:06:50,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-23 02:06:50,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-11-23 02:06:50,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 72 states have internal predecessors, (85), 19 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (25), 23 states have call predecessors, (25), 19 states have call successors, (25) [2021-11-23 02:06:50,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 129 transitions. [2021-11-23 02:06:50,685 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 129 transitions. Word has length 56 [2021-11-23 02:06:50,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:50,686 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 129 transitions. [2021-11-23 02:06:50,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-23 02:06:50,686 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 129 transitions. [2021-11-23 02:06:50,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-23 02:06:50,687 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:50,687 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:50,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:50,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:51,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:06:51,100 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:51,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:51,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1290194610, now seen corresponding path program 1 times [2021-11-23 02:06:51,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:06:51,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [26107722] [2021-11-23 02:06:51,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:51,101 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:06:51,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:06:51,102 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:06:51,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-23 02:06:51,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:51,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:06:51,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:51,370 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 02:06:51,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:51,608 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 02:06:51,608 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:06:51,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [26107722] [2021-11-23 02:06:51,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [26107722] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:06:51,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [532607824] [2021-11-23 02:06:51,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:51,609 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:06:51,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:06:51,609 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:06:51,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-23 02:06:51,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:51,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 02:06:51,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:52,320 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 02:06:52,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:52,697 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 02:06:52,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [532607824] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:06:52,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:06:52,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 9, 11] total 26 [2021-11-23 02:06:52,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431587654] [2021-11-23 02:06:52,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:06:52,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 02:06:52,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:06:52,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 02:06:52,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-11-23 02:06:52,699 INFO L87 Difference]: Start difference. First operand 98 states and 129 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-23 02:06:53,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:53,378 INFO L93 Difference]: Finished difference Result 121 states and 157 transitions. [2021-11-23 02:06:53,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 02:06:53,380 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 56 [2021-11-23 02:06:53,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:53,381 INFO L225 Difference]: With dead ends: 121 [2021-11-23 02:06:53,381 INFO L226 Difference]: Without dead ends: 119 [2021-11-23 02:06:53,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 02:06:53,382 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 39 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:53,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 399 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:06:53,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-23 02:06:53,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 90. [2021-11-23 02:06:53,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 66 states have internal predecessors, (77), 19 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) [2021-11-23 02:06:53,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 117 transitions. [2021-11-23 02:06:53,398 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 117 transitions. Word has length 56 [2021-11-23 02:06:53,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:53,400 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 117 transitions. [2021-11-23 02:06:53,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-23 02:06:53,400 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 117 transitions. [2021-11-23 02:06:53,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-23 02:06:53,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:53,402 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:53,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:53,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-11-23 02:06:53,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:06:53,810 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:53,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:53,810 INFO L85 PathProgramCache]: Analyzing trace with hash -373470327, now seen corresponding path program 1 times [2021-11-23 02:06:53,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:06:53,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1450295149] [2021-11-23 02:06:53,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:53,811 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:06:53,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:06:53,812 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:06:53,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-23 02:06:53,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:53,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:06:53,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:54,071 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 02:06:54,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:54,338 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 02:06:54,339 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:06:54,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1450295149] [2021-11-23 02:06:54,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1450295149] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:06:54,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1080221225] [2021-11-23 02:06:54,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:54,339 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:06:54,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:06:54,340 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:06:54,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-23 02:06:54,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:54,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 02:06:54,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:54,717 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 02:06:54,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:54,977 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 02:06:54,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1080221225] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:06:54,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612274536] [2021-11-23 02:06:54,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:54,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:54,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:06:54,979 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:06:55,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-23 02:06:55,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:55,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 02:06:55,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:55,371 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 02:06:55,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:55,651 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 02:06:55,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612274536] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:06:55,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:06:55,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 9, 11, 10] total 23 [2021-11-23 02:06:55,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005008768] [2021-11-23 02:06:55,653 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:06:55,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 02:06:55,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:06:55,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 02:06:55,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-11-23 02:06:55,655 INFO L87 Difference]: Start difference. First operand 90 states and 117 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 15 states have internal predecessors, (63), 4 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (20), 12 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-23 02:06:56,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:56,716 INFO L93 Difference]: Finished difference Result 118 states and 149 transitions. [2021-11-23 02:06:56,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 02:06:56,722 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 15 states have internal predecessors, (63), 4 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (20), 12 states have call predecessors, (20), 4 states have call successors, (20) Word has length 56 [2021-11-23 02:06:56,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:56,722 INFO L225 Difference]: With dead ends: 118 [2021-11-23 02:06:56,723 INFO L226 Difference]: Without dead ends: 99 [2021-11-23 02:06:56,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=237, Invalid=1169, Unknown=0, NotChecked=0, Total=1406 [2021-11-23 02:06:56,724 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 193 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:56,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 643 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:06:56,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-23 02:06:56,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 72. [2021-11-23 02:06:56,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 53 states have (on average 1.150943396226415) internal successors, (61), 52 states have internal predecessors, (61), 15 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (17), 17 states have call predecessors, (17), 15 states have call successors, (17) [2021-11-23 02:06:56,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 93 transitions. [2021-11-23 02:06:56,731 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 93 transitions. Word has length 56 [2021-11-23 02:06:56,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:56,732 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 93 transitions. [2021-11-23 02:06:56,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 15 states have internal predecessors, (63), 4 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (20), 12 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-23 02:06:56,732 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 93 transitions. [2021-11-23 02:06:56,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-23 02:06:56,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:56,733 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:56,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-23 02:06:56,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-11-23 02:06:57,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:57,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:06:57,354 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:57,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:57,355 INFO L85 PathProgramCache]: Analyzing trace with hash 2059347801, now seen corresponding path program 1 times [2021-11-23 02:06:57,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:06:57,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [741259278] [2021-11-23 02:06:57,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:57,355 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:06:57,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:06:57,356 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:06:57,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-23 02:06:57,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:57,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 02:06:57,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:57,658 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 02:06:57,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:58,120 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-23 02:06:58,120 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:06:58,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [741259278] [2021-11-23 02:06:58,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [741259278] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:06:58,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:06:58,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-23 02:06:58,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100070707] [2021-11-23 02:06:58,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:06:58,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:06:58,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:06:58,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:06:58,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:06:58,122 INFO L87 Difference]: Start difference. First operand 72 states and 93 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-23 02:06:58,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:58,262 INFO L93 Difference]: Finished difference Result 89 states and 111 transitions. [2021-11-23 02:06:58,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:06:58,263 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 62 [2021-11-23 02:06:58,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:58,264 INFO L225 Difference]: With dead ends: 89 [2021-11-23 02:06:58,264 INFO L226 Difference]: Without dead ends: 72 [2021-11-23 02:06:58,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:06:58,265 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 17 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:58,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 269 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:06:58,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-23 02:06:58,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-11-23 02:06:58,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 52 states have internal predecessors, (60), 15 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (17), 17 states have call predecessors, (17), 15 states have call successors, (17) [2021-11-23 02:06:58,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2021-11-23 02:06:58,271 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 62 [2021-11-23 02:06:58,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:58,272 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2021-11-23 02:06:58,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-23 02:06:58,272 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2021-11-23 02:06:58,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-23 02:06:58,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:58,274 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:58,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:58,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:06:58,486 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:58,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:58,486 INFO L85 PathProgramCache]: Analyzing trace with hash 253909467, now seen corresponding path program 1 times [2021-11-23 02:06:58,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:06:58,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [952655909] [2021-11-23 02:06:58,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:58,487 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:06:58,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:06:58,488 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:06:58,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-23 02:06:58,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:58,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:06:58,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:58,791 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:06:58,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:59,245 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 02:06:59,245 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:06:59,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [952655909] [2021-11-23 02:06:59,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [952655909] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:06:59,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:06:59,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 17 [2021-11-23 02:06:59,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133288799] [2021-11-23 02:06:59,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:06:59,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 02:06:59,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:06:59,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 02:06:59,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-11-23 02:06:59,247 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-23 02:06:59,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:59,592 INFO L93 Difference]: Finished difference Result 102 states and 128 transitions. [2021-11-23 02:06:59,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 02:06:59,600 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 62 [2021-11-23 02:06:59,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:59,601 INFO L225 Difference]: With dead ends: 102 [2021-11-23 02:06:59,601 INFO L226 Difference]: Without dead ends: 74 [2021-11-23 02:06:59,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-11-23 02:06:59,602 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 40 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:59,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 312 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:06:59,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-23 02:06:59,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-23 02:06:59,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 15 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (19), 17 states have call predecessors, (19), 15 states have call successors, (19) [2021-11-23 02:06:59,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 95 transitions. [2021-11-23 02:06:59,610 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 95 transitions. Word has length 62 [2021-11-23 02:06:59,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:59,610 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 95 transitions. [2021-11-23 02:06:59,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-23 02:06:59,610 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 95 transitions. [2021-11-23 02:06:59,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-23 02:06:59,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:59,612 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:59,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:59,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:06:59,822 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:59,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:59,822 INFO L85 PathProgramCache]: Analyzing trace with hash 647887735, now seen corresponding path program 1 times [2021-11-23 02:06:59,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:06:59,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1886737071] [2021-11-23 02:06:59,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:59,823 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:06:59,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:06:59,824 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:06:59,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-23 02:06:59,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:59,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:06:59,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:00,210 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:07:00,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:07:01,330 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 02:07:01,330 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:07:01,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1886737071] [2021-11-23 02:07:01,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1886737071] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:07:01,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:07:01,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 17 [2021-11-23 02:07:01,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544414613] [2021-11-23 02:07:01,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:07:01,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 02:07:01,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:07:01,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 02:07:01,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-11-23 02:07:01,333 INFO L87 Difference]: Start difference. First operand 74 states and 95 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-23 02:07:01,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:07:01,778 INFO L93 Difference]: Finished difference Result 104 states and 131 transitions. [2021-11-23 02:07:01,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 02:07:01,779 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 63 [2021-11-23 02:07:01,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:07:01,780 INFO L225 Difference]: With dead ends: 104 [2021-11-23 02:07:01,780 INFO L226 Difference]: Without dead ends: 76 [2021-11-23 02:07:01,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-11-23 02:07:01,781 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 37 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:07:01,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 318 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 175 Invalid, 0 Unknown, 26 Unchecked, 0.3s Time] [2021-11-23 02:07:01,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-23 02:07:01,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2021-11-23 02:07:01,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 15 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (19), 17 states have call predecessors, (19), 15 states have call successors, (19) [2021-11-23 02:07:01,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 95 transitions. [2021-11-23 02:07:01,789 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 95 transitions. Word has length 63 [2021-11-23 02:07:01,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:07:01,790 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 95 transitions. [2021-11-23 02:07:01,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-23 02:07:01,790 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 95 transitions. [2021-11-23 02:07:01,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-23 02:07:01,791 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:07:01,791 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:07:01,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2021-11-23 02:07:02,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:07:02,005 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:07:02,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:07:02,005 INFO L85 PathProgramCache]: Analyzing trace with hash -589254976, now seen corresponding path program 1 times [2021-11-23 02:07:02,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:07:02,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [60242732] [2021-11-23 02:07:02,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:02,005 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:07:02,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:07:02,006 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:07:02,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-23 02:07:02,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:02,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 02:07:02,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:02,468 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-23 02:07:02,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:07:02,807 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-23 02:07:02,807 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:07:02,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [60242732] [2021-11-23 02:07:02,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [60242732] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:07:02,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1870930028] [2021-11-23 02:07:02,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:02,808 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:07:02,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:07:02,816 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:07:02,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-23 02:07:03,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:03,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 02:07:03,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-23 02:07:03,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:07:03,977 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-23 02:07:03,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1870930028] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:07:03,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138202706] [2021-11-23 02:07:03,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:03,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:07:03,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:07:03,978 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:07:03,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-23 02:07:04,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:04,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 02:07:04,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:04,600 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-23 02:07:04,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:07:04,866 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-23 02:07:04,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138202706] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:07:04,866 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:07:04,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 25 [2021-11-23 02:07:04,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426417751] [2021-11-23 02:07:04,866 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:07:04,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 02:07:04,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:07:04,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 02:07:04,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-11-23 02:07:04,868 INFO L87 Difference]: Start difference. First operand 74 states and 95 transitions. Second operand has 25 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 23 states have internal predecessors, (79), 10 states have call successors, (21), 1 states have call predecessors, (21), 4 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) [2021-11-23 02:07:06,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:07:06,098 INFO L93 Difference]: Finished difference Result 147 states and 187 transitions. [2021-11-23 02:07:06,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 02:07:06,098 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 23 states have internal predecessors, (79), 10 states have call successors, (21), 1 states have call predecessors, (21), 4 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) Word has length 63 [2021-11-23 02:07:06,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:07:06,099 INFO L225 Difference]: With dead ends: 147 [2021-11-23 02:07:06,099 INFO L226 Difference]: Without dead ends: 117 [2021-11-23 02:07:06,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 349 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 02:07:06,100 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 196 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:07:06,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 630 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 02:07:06,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-23 02:07:06,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 77. [2021-11-23 02:07:06,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 57 states have internal predecessors, (61), 16 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (23), 17 states have call predecessors, (23), 16 states have call successors, (23) [2021-11-23 02:07:06,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 100 transitions. [2021-11-23 02:07:06,114 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 100 transitions. Word has length 63 [2021-11-23 02:07:06,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:07:06,114 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 100 transitions. [2021-11-23 02:07:06,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 23 states have internal predecessors, (79), 10 states have call successors, (21), 1 states have call predecessors, (21), 4 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) [2021-11-23 02:07:06,115 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 100 transitions. [2021-11-23 02:07:06,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 02:07:06,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:07:06,116 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:07:06,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-23 02:07:06,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-11-23 02:07:06,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-11-23 02:07:06,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:07:06,730 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:07:06,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:07:06,731 INFO L85 PathProgramCache]: Analyzing trace with hash -472199073, now seen corresponding path program 1 times [2021-11-23 02:07:06,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:07:06,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1770302845] [2021-11-23 02:07:06,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:06,731 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:07:06,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:07:06,732 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:07:06,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-23 02:07:06,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:06,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:07:06,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:07,118 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:07:07,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:07:08,231 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 02:07:08,232 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:07:08,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1770302845] [2021-11-23 02:07:08,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1770302845] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:07:08,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:07:08,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 17 [2021-11-23 02:07:08,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798640444] [2021-11-23 02:07:08,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:07:08,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 02:07:08,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:07:08,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 02:07:08,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-11-23 02:07:08,233 INFO L87 Difference]: Start difference. First operand 77 states and 100 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-23 02:07:08,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:07:08,661 INFO L93 Difference]: Finished difference Result 107 states and 137 transitions. [2021-11-23 02:07:08,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 02:07:08,662 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 64 [2021-11-23 02:07:08,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:07:08,663 INFO L225 Difference]: With dead ends: 107 [2021-11-23 02:07:08,663 INFO L226 Difference]: Without dead ends: 79 [2021-11-23 02:07:08,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-11-23 02:07:08,664 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 36 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:07:08,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 318 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 175 Invalid, 0 Unknown, 33 Unchecked, 0.3s Time] [2021-11-23 02:07:08,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-23 02:07:08,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2021-11-23 02:07:08,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 57 states have internal predecessors, (61), 16 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (23), 17 states have call predecessors, (23), 16 states have call successors, (23) [2021-11-23 02:07:08,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 100 transitions. [2021-11-23 02:07:08,671 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 100 transitions. Word has length 64 [2021-11-23 02:07:08,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:07:08,672 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 100 transitions. [2021-11-23 02:07:08,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-23 02:07:08,672 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 100 transitions. [2021-11-23 02:07:08,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 02:07:08,673 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:07:08,673 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:07:08,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-23 02:07:08,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:07:08,887 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:07:08,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:07:08,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1283662981, now seen corresponding path program 1 times [2021-11-23 02:07:08,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:07:08,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [763694888] [2021-11-23 02:07:08,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:08,889 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:07:08,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:07:08,890 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:07:08,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-23 02:07:08,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:08,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:07:08,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:09,269 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:07:09,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:07:09,780 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 02:07:09,781 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:07:09,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [763694888] [2021-11-23 02:07:09,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [763694888] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:07:09,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:07:09,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 17 [2021-11-23 02:07:09,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491871434] [2021-11-23 02:07:09,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:07:09,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 02:07:09,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:07:09,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 02:07:09,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-11-23 02:07:09,783 INFO L87 Difference]: Start difference. First operand 77 states and 100 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-23 02:07:10,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:07:10,467 INFO L93 Difference]: Finished difference Result 105 states and 131 transitions. [2021-11-23 02:07:10,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 02:07:10,468 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 65 [2021-11-23 02:07:10,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:07:10,469 INFO L225 Difference]: With dead ends: 105 [2021-11-23 02:07:10,469 INFO L226 Difference]: Without dead ends: 77 [2021-11-23 02:07:10,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-11-23 02:07:10,470 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 35 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:07:10,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 318 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:07:10,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-23 02:07:10,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2021-11-23 02:07:10,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 55 states have internal predecessors, (60), 16 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (18), 17 states have call predecessors, (18), 16 states have call successors, (18) [2021-11-23 02:07:10,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2021-11-23 02:07:10,477 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 65 [2021-11-23 02:07:10,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:07:10,478 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2021-11-23 02:07:10,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-23 02:07:10,478 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2021-11-23 02:07:10,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-23 02:07:10,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:07:10,479 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:07:10,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-23 02:07:10,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:07:10,680 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:07:10,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:07:10,680 INFO L85 PathProgramCache]: Analyzing trace with hash -322048964, now seen corresponding path program 1 times [2021-11-23 02:07:10,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:07:10,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [185352927] [2021-11-23 02:07:10,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:10,681 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:07:10,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:07:10,682 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:07:10,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-23 02:07:10,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:10,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:07:10,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:10,829 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 02:07:10,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:07:10,940 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-23 02:07:10,940 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:07:10,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [185352927] [2021-11-23 02:07:10,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [185352927] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:07:10,940 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:07:10,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-23 02:07:10,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914205265] [2021-11-23 02:07:10,940 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:07:10,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:07:10,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:07:10,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:07:10,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:07:10,942 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-23 02:07:10,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:07:10,955 INFO L93 Difference]: Finished difference Result 93 states and 114 transitions. [2021-11-23 02:07:10,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:07:10,956 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 65 [2021-11-23 02:07:10,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:07:10,956 INFO L225 Difference]: With dead ends: 93 [2021-11-23 02:07:10,956 INFO L226 Difference]: Without dead ends: 49 [2021-11-23 02:07:10,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:07:10,957 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 0 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:07:10,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 169 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:07:10,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-23 02:07:10,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-23 02:07:10,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 36 states have internal predecessors, (38), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-23 02:07:10,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2021-11-23 02:07:10,962 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 65 [2021-11-23 02:07:10,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:07:10,962 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2021-11-23 02:07:10,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-23 02:07:10,962 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2021-11-23 02:07:10,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-23 02:07:10,963 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:07:10,963 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:07:10,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-23 02:07:11,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:07:11,176 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:07:11,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:07:11,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1336082074, now seen corresponding path program 1 times [2021-11-23 02:07:11,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:07:11,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [641553528] [2021-11-23 02:07:11,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:11,177 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:07:11,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:07:11,178 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:07:11,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-23 02:07:11,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:11,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:07:11,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:11,486 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 47 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-23 02:07:11,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:07:11,751 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-23 02:07:11,751 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:07:11,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [641553528] [2021-11-23 02:07:11,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [641553528] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:07:11,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1286633213] [2021-11-23 02:07:11,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:11,752 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:07:11,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:07:11,752 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:07:11,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2021-11-23 02:07:12,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:12,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 02:07:12,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:12,618 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-23 02:07:12,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:07:13,018 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-23 02:07:13,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1286633213] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:07:13,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417079809] [2021-11-23 02:07:13,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:13,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:07:13,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:07:13,020 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:07:13,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-23 02:07:13,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:13,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 02:07:13,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:13,462 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 37 proven. 14 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-23 02:07:13,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:07:13,763 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-23 02:07:13,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417079809] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:07:13,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:07:13,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9, 9, 12, 9] total 33 [2021-11-23 02:07:13,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217380971] [2021-11-23 02:07:13,764 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:07:13,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-23 02:07:13,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:07:13,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-23 02:07:13,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 02:07:13,766 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 33 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 22 states have internal predecessors, (117), 8 states have call successors, (42), 2 states have call predecessors, (42), 6 states have return successors, (49), 19 states have call predecessors, (49), 8 states have call successors, (49) [2021-11-23 02:07:14,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:07:14,037 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-11-23 02:07:14,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 02:07:14,038 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 22 states have internal predecessors, (117), 8 states have call successors, (42), 2 states have call predecessors, (42), 6 states have return successors, (49), 19 states have call predecessors, (49), 8 states have call successors, (49) Word has length 74 [2021-11-23 02:07:14,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:07:14,038 INFO L225 Difference]: With dead ends: 53 [2021-11-23 02:07:14,038 INFO L226 Difference]: Without dead ends: 0 [2021-11-23 02:07:14,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=174, Invalid=1232, Unknown=0, NotChecked=0, Total=1406 [2021-11-23 02:07:14,039 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 25 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:07:14,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 118 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:07:14,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-23 02:07:14,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-23 02:07:14,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:07:14,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-23 02:07:14,040 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 74 [2021-11-23 02:07:14,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:07:14,041 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-23 02:07:14,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 22 states have internal predecessors, (117), 8 states have call successors, (42), 2 states have call predecessors, (42), 6 states have return successors, (49), 19 states have call predecessors, (49), 8 states have call successors, (49) [2021-11-23 02:07:14,041 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-23 02:07:14,041 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-23 02:07:14,044 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-23 02:07:14,045 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-23 02:07:14,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2021-11-23 02:07:14,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-11-23 02:07:14,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2021-11-23 02:07:14,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:07:14,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-23 02:07:20,070 INFO L858 garLoopResultBuilder]: For program point isnan_floatFINAL(line 57) no Hoare annotation was computed. [2021-11-23 02:07:20,071 INFO L861 garLoopResultBuilder]: At program point isnan_floatENTRY(line 57) the Hoare annotation is: true [2021-11-23 02:07:20,071 INFO L858 garLoopResultBuilder]: For program point isnan_floatEXIT(line 57) no Hoare annotation was computed. [2021-11-23 02:07:20,071 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 82) no Hoare annotation was computed. [2021-11-23 02:07:20,071 INFO L854 garLoopResultBuilder]: At program point L81(line 81) the Hoare annotation is: (let ((.cse1 (fp.eq |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (.cse0 (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|))) (or (and (= |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_main_~y~0#1|) (not .cse0) .cse1) (and (= |ULTIMATE.start_fmax_float_#res#1| |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~res~0#1| |ULTIMATE.start_main_~x~0#1|) (not .cse1) .cse0 (= |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_main_~x~0#1|) (not (fp.eq |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_fmax_float_~y#1|))))) [2021-11-23 02:07:20,071 INFO L858 garLoopResultBuilder]: For program point L81-1(line 81) no Hoare annotation was computed. [2021-11-23 02:07:20,071 INFO L858 garLoopResultBuilder]: For program point L81-2(line 81) no Hoare annotation was computed. [2021-11-23 02:07:20,072 INFO L854 garLoopResultBuilder]: At program point L81-3(line 81) the Hoare annotation is: (let ((.cse1 (fp.eq |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (.cse0 (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|))) (or (and (= |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_main_~y~0#1|) (not .cse0) .cse1) (and (= |ULTIMATE.start_fmax_float_#res#1| |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~res~0#1| |ULTIMATE.start_main_~x~0#1|) (not .cse1) .cse0 (= |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_main_~x~0#1|) (not (fp.eq |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_fmax_float_~y#1|))))) [2021-11-23 02:07:20,072 INFO L858 garLoopResultBuilder]: For program point L81-4(line 81) no Hoare annotation was computed. [2021-11-23 02:07:20,072 INFO L858 garLoopResultBuilder]: For program point L81-6(lines 81 84) no Hoare annotation was computed. [2021-11-23 02:07:20,072 INFO L861 garLoopResultBuilder]: At program point L69(line 69) the Hoare annotation is: true [2021-11-23 02:07:20,072 INFO L858 garLoopResultBuilder]: For program point L69-1(line 69) no Hoare annotation was computed. [2021-11-23 02:07:20,072 INFO L858 garLoopResultBuilder]: For program point L69-2(line 69) no Hoare annotation was computed. [2021-11-23 02:07:20,072 INFO L854 garLoopResultBuilder]: At program point L69-3(line 69) the Hoare annotation is: (and (= |ULTIMATE.start_main_#t~ret10#1| (_ bv1 32)) |ULTIMATE.start_main_#t~short12#1| (not (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|))) [2021-11-23 02:07:20,072 INFO L858 garLoopResultBuilder]: For program point L69-4(line 69) no Hoare annotation was computed. [2021-11-23 02:07:20,072 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-23 02:07:20,073 INFO L858 garLoopResultBuilder]: For program point L69-6(line 69) no Hoare annotation was computed. [2021-11-23 02:07:20,073 INFO L858 garLoopResultBuilder]: For program point L69-7(lines 69 70) no Hoare annotation was computed. [2021-11-23 02:07:20,073 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-23 02:07:20,073 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-23 02:07:20,073 INFO L858 garLoopResultBuilder]: For program point L69-9(lines 69 85) no Hoare annotation was computed. [2021-11-23 02:07:20,073 INFO L858 garLoopResultBuilder]: For program point L69-11(lines 69 85) no Hoare annotation was computed. [2021-11-23 02:07:20,073 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 76) no Hoare annotation was computed. [2021-11-23 02:07:20,073 INFO L858 garLoopResultBuilder]: For program point L53(line 53) no Hoare annotation was computed. [2021-11-23 02:07:20,073 INFO L858 garLoopResultBuilder]: For program point L53-2(line 53) no Hoare annotation was computed. [2021-11-23 02:07:20,073 INFO L854 garLoopResultBuilder]: At program point L53-3(lines 45 54) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_main_~y~0#1|)) (.cse1 (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|))) (or (and (fp.eq |ULTIMATE.start_fmax_float_#res#1| |ULTIMATE.start_main_~y~0#1|) (forall ((|ULTIMATE.start_fmax_float_~y#1| (_ FloatingPoint 8 24))) (not (fp.gt |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_fmax_float_~y#1|))) .cse0 (not .cse1)) (and (= |ULTIMATE.start_fmax_float_#res#1| |ULTIMATE.start_main_~x~0#1|) .cse0 .cse1 (= |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_main_~x~0#1|) (not (fp.eq |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_fmax_float_~y#1|))))) [2021-11-23 02:07:20,073 INFO L858 garLoopResultBuilder]: For program point L82(line 82) no Hoare annotation was computed. [2021-11-23 02:07:20,074 INFO L854 garLoopResultBuilder]: At program point L70(line 70) the Hoare annotation is: (let ((.cse0 (not |ULTIMATE.start_main_#t~short12#1|)) (.cse1 (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse2 (not |ULTIMATE.start_main_#t~short16#1|))) (or (and .cse0 (= |ULTIMATE.start_main_#t~ret10#1| (_ bv1 32)) (= |ULTIMATE.start_main_#t~ret11#1| (_ bv1 32)) (not (fp.eq |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (not .cse1) .cse2) (and .cse0 (= |ULTIMATE.start_main_#t~ret10#1| (_ bv0 32)) .cse1 .cse2))) [2021-11-23 02:07:20,074 INFO L858 garLoopResultBuilder]: For program point L70-1(line 70) no Hoare annotation was computed. [2021-11-23 02:07:20,074 INFO L858 garLoopResultBuilder]: For program point L70-2(line 70) no Hoare annotation was computed. [2021-11-23 02:07:20,074 INFO L854 garLoopResultBuilder]: At program point L70-3(line 70) the Hoare annotation is: (and (not |ULTIMATE.start_main_#t~short12#1|) |ULTIMATE.start_main_#t~short15#1| (= |ULTIMATE.start_main_#t~ret13#1| (_ bv0 32)) (= |ULTIMATE.start_main_#t~ret10#1| (_ bv0 32)) (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|) (not |ULTIMATE.start_main_#t~short16#1|)) [2021-11-23 02:07:20,076 INFO L858 garLoopResultBuilder]: For program point L70-4(line 70) no Hoare annotation was computed. [2021-11-23 02:07:20,076 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-23 02:07:20,076 INFO L858 garLoopResultBuilder]: For program point L70-6(line 70) no Hoare annotation was computed. [2021-11-23 02:07:20,076 INFO L861 garLoopResultBuilder]: At program point L87(lines 59 88) the Hoare annotation is: true [2021-11-23 02:07:20,076 INFO L854 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_main_~y~0#1|)) (.cse2 (= |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_main_~x~0#1|)) (.cse1 (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse3 (fp.eq |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_fmax_float_~y#1|))) (or (and .cse0 .cse1 .cse2 (not .cse3)) (and .cse0 .cse2 (not .cse1) .cse3))) [2021-11-23 02:07:20,076 INFO L858 garLoopResultBuilder]: For program point L50-1(lines 50 52) no Hoare annotation was computed. [2021-11-23 02:07:20,077 INFO L854 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_main_~y~0#1|)) (.cse2 (= |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_main_~x~0#1|)) (.cse1 (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse3 (fp.eq |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_fmax_float_~y#1|))) (or (and .cse0 .cse1 .cse2 (not .cse3)) (and .cse0 .cse2 (not .cse1) .cse3))) [2021-11-23 02:07:20,077 INFO L858 garLoopResultBuilder]: For program point L46-1(lines 46 48) no Hoare annotation was computed. [2021-11-23 02:07:20,077 INFO L854 garLoopResultBuilder]: At program point L75(line 75) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_main_~y~0#1|)) (.cse1 (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|))) (or (and (= |ULTIMATE.start_fmax_float_#res#1| |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~res~0#1| |ULTIMATE.start_main_~x~0#1|) .cse0 .cse1 (= |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_main_~x~0#1|) (not (fp.eq |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_fmax_float_~y#1|))) (and (fp.eq |ULTIMATE.start_fmax_float_#res#1| |ULTIMATE.start_main_~y~0#1|) (fp.eq |ULTIMATE.start_main_~res~0#1| |ULTIMATE.start_main_~y~0#1|) (forall ((|ULTIMATE.start_fmax_float_~y#1| (_ FloatingPoint 8 24))) (not (fp.gt |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_fmax_float_~y#1|))) .cse0 (not .cse1)))) [2021-11-23 02:07:20,077 INFO L858 garLoopResultBuilder]: For program point L75-1(line 75) no Hoare annotation was computed. [2021-11-23 02:07:20,077 INFO L858 garLoopResultBuilder]: For program point L75-2(line 75) no Hoare annotation was computed. [2021-11-23 02:07:20,077 INFO L854 garLoopResultBuilder]: At program point L75-3(line 75) the Hoare annotation is: (or (and (fp.eq |ULTIMATE.start_fmax_float_#res#1| |ULTIMATE.start_main_~y~0#1|) |ULTIMATE.start_main_#t~short20#1| (fp.eq |ULTIMATE.start_main_~res~0#1| |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_main_#t~ret18#1| (_ bv1 32)) (not (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|))) (and (= |ULTIMATE.start_fmax_float_#res#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_#t~short20#1| (or (= |ULTIMATE.start_main_~x~0#1| (fp (_ bv0 1) (_ bv0 8) (_ bv0 23))) (= (fp (_ bv1 1) (_ bv0 8) (_ bv0 23)) |ULTIMATE.start_main_~x~0#1|)) (= |ULTIMATE.start_main_~res~0#1| |ULTIMATE.start_main_~x~0#1|) (not (fp.eq |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (= |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_main_~x~0#1|) (not (fp.eq |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_fmax_float_~y#1|)))) [2021-11-23 02:07:20,077 INFO L858 garLoopResultBuilder]: For program point L75-4(line 75) no Hoare annotation was computed. [2021-11-23 02:07:20,077 INFO L858 garLoopResultBuilder]: For program point L75-6(lines 75 78) no Hoare annotation was computed. [2021-11-23 02:07:20,077 INFO L858 garLoopResultBuilder]: For program point L76(line 76) no Hoare annotation was computed. [2021-11-23 02:07:20,077 INFO L858 garLoopResultBuilder]: For program point L33(lines 33 42) no Hoare annotation was computed. [2021-11-23 02:07:20,077 INFO L858 garLoopResultBuilder]: For program point __fpclassify_floatFINAL(lines 22 43) no Hoare annotation was computed. [2021-11-23 02:07:20,078 INFO L858 garLoopResultBuilder]: For program point L25-1(lines 25 29) no Hoare annotation was computed. [2021-11-23 02:07:20,078 INFO L854 garLoopResultBuilder]: At program point L25-2(lines 25 29) the Hoare annotation is: (= |__fpclassify_float_#in~x| __fpclassify_float_~x) [2021-11-23 02:07:20,078 INFO L858 garLoopResultBuilder]: For program point L25-3(lines 22 43) no Hoare annotation was computed. [2021-11-23 02:07:20,079 INFO L858 garLoopResultBuilder]: For program point L36(lines 36 42) no Hoare annotation was computed. [2021-11-23 02:07:20,079 INFO L861 garLoopResultBuilder]: At program point __fpclassify_floatENTRY(lines 22 43) the Hoare annotation is: true [2021-11-23 02:07:20,079 INFO L858 garLoopResultBuilder]: For program point __fpclassify_floatEXIT(lines 22 43) no Hoare annotation was computed. [2021-11-23 02:07:20,079 INFO L858 garLoopResultBuilder]: For program point L39(lines 39 42) no Hoare annotation was computed. [2021-11-23 02:07:20,081 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:07:20,083 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 02:07:20,091 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_fmax_float_~y#1,QUANTIFIED] [2021-11-23 02:07:20,099 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_fmax_float_~y#1,QUANTIFIED] [2021-11-23 02:07:20,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:07:20 BoogieIcfgContainer [2021-11-23 02:07:20,103 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 02:07:20,104 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 02:07:20,104 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 02:07:20,105 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 02:07:20,105 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:06:10" (3/4) ... [2021-11-23 02:07:20,109 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-23 02:07:20,115 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure isnan_float [2021-11-23 02:07:20,116 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __fpclassify_float [2021-11-23 02:07:20,125 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2021-11-23 02:07:20,125 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-11-23 02:07:20,126 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-23 02:07:20,126 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-23 02:07:20,158 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: \old(x) == x [2021-11-23 02:07:20,159 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((~fp.eq~FLOAT(\result, y) && (forall ULTIMATE.start_fmax_float_~y#1 : C_FLOAT :: !~fp.gt~FLOAT(x, ULTIMATE.start_fmax_float_~y#1))) && y == y) && !~fp.eq~FLOAT(x, x)) || ((((\result == x && y == y) && ~fp.eq~FLOAT(x, x)) && x == x) && !~fp.eq~FLOAT(y, y)) [2021-11-23 02:07:20,190 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/witness.graphml [2021-11-23 02:07:20,190 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 02:07:20,192 INFO L158 Benchmark]: Toolchain (without parser) took 70192.40ms. Allocated memory was 88.1MB in the beginning and 197.1MB in the end (delta: 109.1MB). Free memory was 53.7MB in the beginning and 88.9MB in the end (delta: -35.2MB). Peak memory consumption was 74.9MB. Max. memory is 16.1GB. [2021-11-23 02:07:20,192 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 88.1MB. Free memory is still 70.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:07:20,192 INFO L158 Benchmark]: CACSL2BoogieTranslator took 276.73ms. Allocated memory is still 88.1MB. Free memory was 53.5MB in the beginning and 71.4MB in the end (delta: -17.9MB). Peak memory consumption was 10.2MB. Max. memory is 16.1GB. [2021-11-23 02:07:20,193 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.33ms. Allocated memory is still 88.1MB. Free memory was 71.4MB in the beginning and 69.8MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:07:20,193 INFO L158 Benchmark]: Boogie Preprocessor took 33.47ms. Allocated memory is still 88.1MB. Free memory was 69.6MB in the beginning and 68.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 02:07:20,196 INFO L158 Benchmark]: RCFGBuilder took 501.83ms. Allocated memory is still 88.1MB. Free memory was 68.2MB in the beginning and 54.6MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 02:07:20,198 INFO L158 Benchmark]: TraceAbstraction took 69247.90ms. Allocated memory was 88.1MB in the beginning and 197.1MB in the end (delta: 109.1MB). Free memory was 54.2MB in the beginning and 93.1MB in the end (delta: -38.9MB). Peak memory consumption was 106.4MB. Max. memory is 16.1GB. [2021-11-23 02:07:20,198 INFO L158 Benchmark]: Witness Printer took 86.52ms. Allocated memory is still 197.1MB. Free memory was 93.1MB in the beginning and 88.9MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-23 02:07:20,206 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 88.1MB. Free memory is still 70.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 276.73ms. Allocated memory is still 88.1MB. Free memory was 53.5MB in the beginning and 71.4MB in the end (delta: -17.9MB). Peak memory consumption was 10.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.33ms. Allocated memory is still 88.1MB. Free memory was 71.4MB in the beginning and 69.8MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 33.47ms. Allocated memory is still 88.1MB. Free memory was 69.6MB in the beginning and 68.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 501.83ms. Allocated memory is still 88.1MB. Free memory was 68.2MB in the beginning and 54.6MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 69247.90ms. Allocated memory was 88.1MB in the beginning and 197.1MB in the end (delta: 109.1MB). Free memory was 54.2MB in the beginning and 93.1MB in the end (delta: -38.9MB). Peak memory consumption was 106.4MB. Max. memory is 16.1GB. * Witness Printer took 86.52ms. Allocated memory is still 197.1MB. Free memory was 93.1MB in the beginning and 88.9MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_fmax_float_~y#1,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_fmax_float_~y#1,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 76]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 82]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 55 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 69.2s, OverallIterations: 25, TraceHistogramMax: 8, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 14.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 5.4s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1521 SdHoareTripleChecker+Valid, 8.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1433 mSDsluCounter, 10452 SdHoareTripleChecker+Invalid, 8.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 403 IncrementalHoareTripleChecker+Unchecked, 8992 mSDsCounter, 475 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5258 IncrementalHoareTripleChecker+Invalid, 6136 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 475 mSolverCounterUnsat, 1460 mSDtfsCounter, 5258 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4745 GetRequests, 4224 SyntacticMatches, 13 SemanticMatches, 508 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2209 ImplicationChecksByTransitivity, 13.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=10, InterpolantAutomatonStates: 266, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 25 MinimizatonAttempts, 271 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 15 LocationsWithAnnotation, 147 PreInvPairs, 181 NumberOfFragments, 311 HoareAnnotationTreeSize, 147 FomulaSimplifications, 8833 FormulaSimplificationTreeSizeReduction, 2.7s HoareSimplificationTime, 15 FomulaSimplificationsInter, 44290 FormulaSimplificationTreeSizeReductionInter, 2.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 3.4s SatisfiabilityAnalysisTime, 34.1s InterpolantComputationTime, 2346 NumberOfCodeBlocks, 2346 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 4602 ConstructedInterpolants, 85 QuantifiedInterpolants, 15006 SizeOfPredicates, 325 NumberOfNonLiveVariables, 5037 ConjunctsInSsa, 568 ConjunctsInUnsatCore, 90 InterpolantComputations, 27 PerfectInterpolantSequences, 2776/3156 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 45]: Loop Invariant [2021-11-23 02:07:20,222 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_fmax_float_~y#1,QUANTIFIED] [2021-11-23 02:07:20,223 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_fmax_float_~y#1,QUANTIFIED] Derived loop invariant: (((~fp.eq~FLOAT(\result, y) && (forall ULTIMATE.start_fmax_float_~y#1 : C_FLOAT :: !~fp.gt~FLOAT(x, ULTIMATE.start_fmax_float_~y#1))) && y == y) && !~fp.eq~FLOAT(x, x)) || ((((\result == x && y == y) && ~fp.eq~FLOAT(x, x)) && x == x) && !~fp.eq~FLOAT(y, y)) - InvariantResult [Line: 59]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: \old(x) == x RESULT: Ultimate proved your program to be correct! [2021-11-23 02:07:20,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47772e56-0450-483b-a47a-7102c09024ab/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE