./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/drift_tenth.c.p+cfa-reducer.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_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/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_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/drift_tenth.c.p+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/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_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/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 ee159be1ed42c29b70080447b490f7a1aeb72331afc90e5794e0e8d61cb20d74 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:17:59,624 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:17:59,626 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:17:59,676 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:17:59,677 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:17:59,681 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:17:59,683 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:17:59,687 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:17:59,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:17:59,696 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:17:59,697 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:17:59,699 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:17:59,700 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:17:59,704 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:17:59,706 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:17:59,712 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:17:59,714 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:17:59,716 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:17:59,718 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:17:59,729 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:17:59,731 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:17:59,733 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:17:59,737 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:17:59,738 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:17:59,748 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:17:59,749 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:17:59,749 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:17:59,751 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:17:59,752 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:17:59,754 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:17:59,754 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:17:59,755 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:17:59,757 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:17:59,759 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:17:59,760 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:17:59,761 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:17:59,761 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:17:59,762 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:17:59,762 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:17:59,763 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:17:59,763 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:17:59,764 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:17:59,814 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:17:59,814 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:17:59,814 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:17:59,814 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:17:59,815 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:17:59,815 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:17:59,815 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:17:59,815 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:17:59,815 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:17:59,816 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:17:59,816 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:17:59,816 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:17:59,816 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:17:59,816 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:17:59,816 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:17:59,817 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:17:59,817 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:17:59,817 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:17:59,818 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:17:59,818 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:17:59,818 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:17:59,818 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:17:59,818 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:17:59,818 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:17:59,818 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:17:59,819 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:17:59,819 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:17:59,819 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:17:59,819 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:17:59,819 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:17:59,820 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:17:59,820 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:17:59,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:17:59,820 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:17:59,820 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:17:59,821 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:17:59,821 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:17:59,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:17:59,821 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:17:59,821 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:17:59,822 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:17:59,822 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_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ee159be1ed42c29b70080447b490f7a1aeb72331afc90e5794e0e8d61cb20d74 [2021-11-23 02:18:00,158 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:18:00,179 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:18:00,181 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:18:00,183 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:18:00,183 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:18:00,185 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/float-benchs/drift_tenth.c.p+cfa-reducer.c [2021-11-23 02:18:00,248 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/data/18a747d4f/cffefe7c0b574839b3abef816e526822/FLAG6c76cfe16 [2021-11-23 02:18:00,658 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:18:00,659 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/sv-benchmarks/c/float-benchs/drift_tenth.c.p+cfa-reducer.c [2021-11-23 02:18:00,665 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/data/18a747d4f/cffefe7c0b574839b3abef816e526822/FLAG6c76cfe16 [2021-11-23 02:18:01,056 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/data/18a747d4f/cffefe7c0b574839b3abef816e526822 [2021-11-23 02:18:01,058 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:18:01,060 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:18:01,063 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:18:01,063 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:18:01,067 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:18:01,067 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:18:01" (1/1) ... [2021-11-23 02:18:01,068 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@590e1fa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:01, skipping insertion in model container [2021-11-23 02:18:01,069 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:18:01" (1/1) ... [2021-11-23 02:18:01,076 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:18:01,088 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:18:01,269 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_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/sv-benchmarks/c/float-benchs/drift_tenth.c.p+cfa-reducer.c[721,734] [2021-11-23 02:18:01,273 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:18:01,283 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:18:01,296 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_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/sv-benchmarks/c/float-benchs/drift_tenth.c.p+cfa-reducer.c[721,734] [2021-11-23 02:18:01,297 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:18:01,310 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:18:01,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:01 WrapperNode [2021-11-23 02:18:01,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:18:01,312 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:18:01,312 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:18:01,312 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:18:01,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:01" (1/1) ... [2021-11-23 02:18:01,323 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:01" (1/1) ... [2021-11-23 02:18:01,340 INFO L137 Inliner]: procedures = 12, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 30 [2021-11-23 02:18:01,340 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:18:01,341 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:18:01,341 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:18:01,342 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:18:01,350 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:01" (1/1) ... [2021-11-23 02:18:01,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:01" (1/1) ... [2021-11-23 02:18:01,351 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:01" (1/1) ... [2021-11-23 02:18:01,352 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:01" (1/1) ... [2021-11-23 02:18:01,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:01" (1/1) ... [2021-11-23 02:18:01,357 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:01" (1/1) ... [2021-11-23 02:18:01,358 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:01" (1/1) ... [2021-11-23 02:18:01,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:18:01,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:18:01,361 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:18:01,361 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:18:01,362 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:01" (1/1) ... [2021-11-23 02:18:01,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:18:01,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:18:01,394 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:18:01,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:18:01,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:18:01,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:18:01,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:18:01,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:18:01,493 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:18:01,494 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:18:01,583 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:18:01,593 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:18:01,594 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 02:18:01,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:18:01 BoogieIcfgContainer [2021-11-23 02:18:01,596 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:18:01,599 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:18:01,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:18:01,608 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:18:01,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:18:01" (1/3) ... [2021-11-23 02:18:01,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@738bee0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:18:01, skipping insertion in model container [2021-11-23 02:18:01,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:01" (2/3) ... [2021-11-23 02:18:01,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@738bee0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:18:01, skipping insertion in model container [2021-11-23 02:18:01,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:18:01" (3/3) ... [2021-11-23 02:18:01,611 INFO L111 eAbstractionObserver]: Analyzing ICFG drift_tenth.c.p+cfa-reducer.c [2021-11-23 02:18:01,616 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:18:01,617 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:18:01,667 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:18:01,675 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 02:18:01,675 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:18:01,690 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:18:01,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-23 02:18:01,711 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:18:01,711 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-23 02:18:01,712 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:18:01,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:18:01,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1497591, now seen corresponding path program 1 times [2021-11-23 02:18:01,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:18:01,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427980889] [2021-11-23 02:18:01,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:18:01,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:18:01,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:18:01,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:18:01,926 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:18:01,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427980889] [2021-11-23 02:18:01,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427980889] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:18:01,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:18:01,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:18:01,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002412672] [2021-11-23 02:18:01,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:18:01,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:18:01,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:18:01,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:18:01,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:18:01,972 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 02:18:02,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:18:02,029 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-11-23 02:18:02,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:18:02,032 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-23 02:18:02,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:18:02,040 INFO L225 Difference]: With dead ends: 13 [2021-11-23 02:18:02,057 INFO L226 Difference]: Without dead ends: 6 [2021-11-23 02:18:02,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 02:18:02,064 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:18:02,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:18:02,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-11-23 02:18:02,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-11-23 02:18:02,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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 02:18:02,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-11-23 02:18:02,113 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-11-23 02:18:02,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:18:02,113 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-11-23 02:18:02,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 02:18:02,114 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-11-23 02:18:02,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 02:18:02,114 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:18:02,114 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-23 02:18:02,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:18:02,115 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:18:02,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:18:02,116 INFO L85 PathProgramCache]: Analyzing trace with hash 46362837, now seen corresponding path program 1 times [2021-11-23 02:18:02,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:18:02,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693963588] [2021-11-23 02:18:02,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:18:02,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:18:02,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:18:02,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:18:02,212 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:18:02,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693963588] [2021-11-23 02:18:02,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693963588] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:18:02,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896792010] [2021-11-23 02:18:02,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:18:02,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:18:02,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:18:02,218 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:18:02,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:18:02,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:18:02,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:18:02,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:18:02,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:18:02,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:18:02,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:18:02,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896792010] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:18:02,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [933514002] [2021-11-23 02:18:02,444 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-23 02:18:02,444 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:18:02,449 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:18:02,455 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:18:02,456 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:18:02,758 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:18:02,864 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '68#(and (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 10 |ULTIMATE.start_main_~main__i~0#1|) (= |ULTIMATE.start_main_~main__tick~0#1| (/ 2500000037252903.0 25000000000000000.0)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2021-11-23 02:18:02,864 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:18:02,865 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:18:02,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-11-23 02:18:02,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246944077] [2021-11-23 02:18:02,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:18:02,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:18:02,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:18:02,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:18:02,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:18:02,875 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:18:02,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:18:02,894 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2021-11-23 02:18:02,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:18:02,901 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-23 02:18:02,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:18:02,901 INFO L225 Difference]: With dead ends: 12 [2021-11-23 02:18:02,901 INFO L226 Difference]: Without dead ends: 9 [2021-11-23 02:18:02,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:18:02,914 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:18:02,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:18:02,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-23 02:18:02,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-23 02:18:02,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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 02:18:02,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-23 02:18:02,918 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-11-23 02:18:02,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:18:02,918 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-23 02:18:02,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:18:02,919 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-23 02:18:02,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 02:18:02,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:18:02,920 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2021-11-23 02:18:02,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:18:03,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:18:03,145 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:18:03,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:18:03,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1846238857, now seen corresponding path program 2 times [2021-11-23 02:18:03,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:18:03,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027039229] [2021-11-23 02:18:03,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:18:03,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:18:03,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:18:03,209 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:18:03,209 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:18:03,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027039229] [2021-11-23 02:18:03,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027039229] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:18:03,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703018181] [2021-11-23 02:18:03,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:18:03,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:18:03,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:18:03,211 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:18:03,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:18:03,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 02:18:03,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:18:03,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:18:03,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:18:03,278 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:18:03,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:18:03,341 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:18:03,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703018181] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:18:03,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [612712582] [2021-11-23 02:18:03,344 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-23 02:18:03,345 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:18:03,345 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:18:03,345 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:18:03,346 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:18:03,433 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:18:03,517 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '156#(and (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 10 |ULTIMATE.start_main_~main__i~0#1|) (= |ULTIMATE.start_main_~main__tick~0#1| (/ 2500000037252903.0 25000000000000000.0)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2021-11-23 02:18:03,517 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:18:03,518 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:18:03,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-11-23 02:18:03,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456803138] [2021-11-23 02:18:03,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:18:03,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 02:18:03,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:18:03,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 02:18:03,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-11-23 02:18:03,521 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:18:03,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:18:03,544 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-11-23 02:18:03,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 02:18:03,545 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-23 02:18:03,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:18:03,545 INFO L225 Difference]: With dead ends: 18 [2021-11-23 02:18:03,546 INFO L226 Difference]: Without dead ends: 15 [2021-11-23 02:18:03,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-11-23 02:18:03,548 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:18:03,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 5 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:18:03,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-23 02:18:03,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-23 02:18:03,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 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 02:18:03,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-11-23 02:18:03,553 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2021-11-23 02:18:03,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:18:03,553 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-11-23 02:18:03,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:18:03,554 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-11-23 02:18:03,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 02:18:03,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:18:03,555 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2021-11-23 02:18:03,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:18:03,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-23 02:18:03,771 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:18:03,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:18:03,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1249756343, now seen corresponding path program 3 times [2021-11-23 02:18:03,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:18:03,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586955201] [2021-11-23 02:18:03,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:18:03,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:18:03,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 02:18:03,798 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 02:18:03,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 02:18:03,847 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-23 02:18:03,847 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 02:18:03,848 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 02:18:03,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:18:03,853 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1] [2021-11-23 02:18:03,858 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 02:18:03,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:18:03 BoogieIcfgContainer [2021-11-23 02:18:03,893 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 02:18:03,894 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 02:18:03,894 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 02:18:03,894 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 02:18:03,895 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:18:01" (3/4) ... [2021-11-23 02:18:03,898 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-23 02:18:03,899 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 02:18:03,900 INFO L158 Benchmark]: Toolchain (without parser) took 2839.60ms. Allocated memory was 86.0MB in the beginning and 136.3MB in the end (delta: 50.3MB). Free memory was 50.0MB in the beginning and 77.2MB in the end (delta: -27.2MB). Peak memory consumption was 22.6MB. Max. memory is 16.1GB. [2021-11-23 02:18:03,900 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 86.0MB. Free memory is still 66.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:18:03,901 INFO L158 Benchmark]: CACSL2BoogieTranslator took 248.19ms. Allocated memory was 86.0MB in the beginning and 136.3MB in the end (delta: 50.3MB). Free memory was 49.9MB in the beginning and 112.9MB in the end (delta: -63.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 02:18:03,901 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.92ms. Allocated memory is still 136.3MB. Free memory was 112.9MB in the beginning and 111.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 02:18:03,905 INFO L158 Benchmark]: Boogie Preprocessor took 18.49ms. Allocated memory is still 136.3MB. Free memory was 111.8MB in the beginning and 110.8MB in the end (delta: 946.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:18:03,906 INFO L158 Benchmark]: RCFGBuilder took 236.23ms. Allocated memory is still 136.3MB. Free memory was 110.8MB in the beginning and 101.7MB in the end (delta: 9.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 02:18:03,906 INFO L158 Benchmark]: TraceAbstraction took 2294.60ms. Allocated memory is still 136.3MB. Free memory was 101.3MB in the beginning and 77.2MB in the end (delta: 24.1MB). Peak memory consumption was 25.4MB. Max. memory is 16.1GB. [2021-11-23 02:18:03,907 INFO L158 Benchmark]: Witness Printer took 5.21ms. Allocated memory is still 136.3MB. Free memory is still 77.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:18:03,909 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 86.0MB. Free memory is still 66.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 248.19ms. Allocated memory was 86.0MB in the beginning and 136.3MB in the end (delta: 50.3MB). Free memory was 49.9MB in the beginning and 112.9MB in the end (delta: -63.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.92ms. Allocated memory is still 136.3MB. Free memory was 112.9MB in the beginning and 111.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.49ms. Allocated memory is still 136.3MB. Free memory was 111.8MB in the beginning and 110.8MB in the end (delta: 946.0kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 236.23ms. Allocated memory is still 136.3MB. Free memory was 110.8MB in the beginning and 101.7MB in the end (delta: 9.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 2294.60ms. Allocated memory is still 136.3MB. Free memory was 101.3MB in the beginning and 77.2MB in the end (delta: 24.1MB). Peak memory consumption was 25.4MB. Max. memory is 16.1GB. * Witness Printer took 5.21ms. Allocated memory is still 136.3MB. Free memory is still 77.2MB. 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: 29]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 24, overapproximation of someBinaryArithmeticFLOAToperation at line 16. Possible FailurePath: [L1] int __return_main; [L9] float main__tick = 0.10000000149011612; [L10] float main__time = 0.0; [L11] int main__i; [L12] main__i = 0 VAL [__return_main=0, main__i=0, main__tick=2500000037252903/25000000000000000, main__time=0] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0, main__i=1, main__tick=2500000037252903/25000000000000000] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0, main__i=2, main__tick=2500000037252903/25000000000000000] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0, main__i=3, main__tick=2500000037252903/25000000000000000] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0, main__i=4, main__tick=2500000037252903/25000000000000000] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0, main__i=5, main__tick=2500000037252903/25000000000000000] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0, main__i=6, main__tick=2500000037252903/25000000000000000] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0, main__i=7, main__tick=2500000037252903/25000000000000000] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0, main__i=8, main__tick=2500000037252903/25000000000000000] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0, main__i=9, main__tick=2500000037252903/25000000000000000] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0, main__i=10, main__tick=2500000037252903/25000000000000000] [L14] COND FALSE !(main__i < 10) [L23] int __tmp_1; [L24] __tmp_1 = main__time != 1.0 [L25] int __VERIFIER_assert__cond; [L26] __VERIFIER_assert__cond = __tmp_1 VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__i=10, main__tick=2500000037252903/25000000000000000] [L27] COND TRUE __VERIFIER_assert__cond == 0 VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__i=10, main__tick=2500000037252903/25000000000000000] [L29] reach_error() VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__i=10, main__tick=2500000037252903/25000000000000000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.2s, OverallIterations: 4, TraceHistogramMax: 10, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 23 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 14 mSDsCounter, 11 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 29 IncrementalHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11 mSolverCounterUnsat, 10 mSDtfsCounter, 29 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=3, InterpolantAutomatonStates: 21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 44 NumberOfCodeBlocks, 44 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 80 SizeOfPredicates, 0 NumberOfNonLiveVariables, 97 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/33 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 02:18:03,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/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 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_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/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_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/drift_tenth.c.p+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/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_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/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 ee159be1ed42c29b70080447b490f7a1aeb72331afc90e5794e0e8d61cb20d74 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:18:06,450 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:18:06,453 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:18:06,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:18:06,521 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:18:06,526 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:18:06,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:18:06,533 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:18:06,536 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:18:06,545 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:18:06,547 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:18:06,549 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:18:06,549 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:18:06,552 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:18:06,554 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:18:06,559 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:18:06,561 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:18:06,562 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:18:06,565 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:18:06,573 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:18:06,576 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:18:06,577 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:18:06,580 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:18:06,582 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:18:06,592 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:18:06,592 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:18:06,593 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:18:06,594 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:18:06,594 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:18:06,595 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:18:06,595 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:18:06,596 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:18:06,597 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:18:06,598 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:18:06,599 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:18:06,599 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:18:06,599 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:18:06,599 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:18:06,600 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:18:06,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:18:06,601 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:18:06,605 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 02:18:06,650 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:18:06,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:18:06,651 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:18:06,652 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:18:06,652 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:18:06,653 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:18:06,653 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:18:06,653 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:18:06,653 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:18:06,654 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:18:06,655 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:18:06,655 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:18:06,657 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:18:06,657 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:18:06,657 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:18:06,657 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:18:06,658 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:18:06,658 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:18:06,658 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:18:06,658 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 02:18:06,658 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 02:18:06,659 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 02:18:06,659 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:18:06,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:18:06,659 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:18:06,659 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:18:06,660 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:18:06,660 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 02:18:06,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:18:06,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:18:06,661 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:18:06,661 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:18:06,662 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:18:06,662 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 02:18:06,662 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 02:18:06,662 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:18:06,663 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:18:06,663 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:18:06,663 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_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ee159be1ed42c29b70080447b490f7a1aeb72331afc90e5794e0e8d61cb20d74 [2021-11-23 02:18:07,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:18:07,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:18:07,136 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:18:07,137 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:18:07,138 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:18:07,140 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/float-benchs/drift_tenth.c.p+cfa-reducer.c [2021-11-23 02:18:07,208 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/data/35a4f4f8c/c837ef886f214f419611b2d63b38ba6c/FLAG566dab157 [2021-11-23 02:18:07,752 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:18:07,752 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/sv-benchmarks/c/float-benchs/drift_tenth.c.p+cfa-reducer.c [2021-11-23 02:18:07,759 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/data/35a4f4f8c/c837ef886f214f419611b2d63b38ba6c/FLAG566dab157 [2021-11-23 02:18:08,117 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/data/35a4f4f8c/c837ef886f214f419611b2d63b38ba6c [2021-11-23 02:18:08,119 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:18:08,122 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:18:08,126 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:18:08,126 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:18:08,130 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:18:08,132 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:18:08" (1/1) ... [2021-11-23 02:18:08,133 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e4349d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:08, skipping insertion in model container [2021-11-23 02:18:08,134 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:18:08" (1/1) ... [2021-11-23 02:18:08,142 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:18:08,162 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:18:08,386 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_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/sv-benchmarks/c/float-benchs/drift_tenth.c.p+cfa-reducer.c[721,734] [2021-11-23 02:18:08,392 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:18:08,406 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:18:08,429 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_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/sv-benchmarks/c/float-benchs/drift_tenth.c.p+cfa-reducer.c[721,734] [2021-11-23 02:18:08,430 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:18:08,451 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:18:08,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:08 WrapperNode [2021-11-23 02:18:08,452 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:18:08,453 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:18:08,453 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:18:08,453 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:18:08,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:08" (1/1) ... [2021-11-23 02:18:08,471 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:08" (1/1) ... [2021-11-23 02:18:08,494 INFO L137 Inliner]: procedures = 13, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 31 [2021-11-23 02:18:08,494 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:18:08,495 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:18:08,496 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:18:08,496 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:18:08,505 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:08" (1/1) ... [2021-11-23 02:18:08,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:08" (1/1) ... [2021-11-23 02:18:08,520 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:08" (1/1) ... [2021-11-23 02:18:08,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:08" (1/1) ... [2021-11-23 02:18:08,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:08" (1/1) ... [2021-11-23 02:18:08,535 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:08" (1/1) ... [2021-11-23 02:18:08,544 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:08" (1/1) ... [2021-11-23 02:18:08,546 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:18:08,548 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:18:08,549 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:18:08,550 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:18:08,551 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:08" (1/1) ... [2021-11-23 02:18:08,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:18:08,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:18:08,603 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:18:08,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:18:08,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:18:08,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:18:08,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:18:08,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 02:18:08,733 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:18:08,735 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:18:08,966 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:18:08,971 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:18:08,972 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 02:18:08,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:18:08 BoogieIcfgContainer [2021-11-23 02:18:08,974 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:18:08,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:18:08,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:18:08,979 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:18:08,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:18:08" (1/3) ... [2021-11-23 02:18:08,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ab43c0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:18:08, skipping insertion in model container [2021-11-23 02:18:08,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:18:08" (2/3) ... [2021-11-23 02:18:08,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ab43c0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:18:08, skipping insertion in model container [2021-11-23 02:18:08,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:18:08" (3/3) ... [2021-11-23 02:18:08,982 INFO L111 eAbstractionObserver]: Analyzing ICFG drift_tenth.c.p+cfa-reducer.c [2021-11-23 02:18:08,987 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:18:08,988 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:18:09,087 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:18:09,111 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 02:18:09,112 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:18:09,138 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:18:09,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 02:18:09,143 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:18:09,144 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-23 02:18:09,144 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:18:09,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:18:09,150 INFO L85 PathProgramCache]: Analyzing trace with hash 28696774, now seen corresponding path program 1 times [2021-11-23 02:18:09,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:18:09,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2084535408] [2021-11-23 02:18:09,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:18:09,179 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:18:09,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:18:09,193 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:18:09,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 02:18:09,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:18:09,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:18:09,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:18:09,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:18:09,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:18:09,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:18:09,482 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:18:09,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2084535408] [2021-11-23 02:18:09,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2084535408] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:18:09,484 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:18:09,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-23 02:18:09,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570311736] [2021-11-23 02:18:09,487 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:18:09,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:18:09,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:18:09,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:18:09,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:18:09,538 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 02:18:09,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:18:09,759 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2021-11-23 02:18:09,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:18:09,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-23 02:18:09,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:18:09,771 INFO L225 Difference]: With dead ends: 17 [2021-11-23 02:18:09,771 INFO L226 Difference]: Without dead ends: 8 [2021-11-23 02:18:09,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:18:09,779 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:18:09,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:18:09,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-23 02:18:09,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-23 02:18:09,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:18:09,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-11-23 02:18:09,808 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2021-11-23 02:18:09,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:18:09,809 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-11-23 02:18:09,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 02:18:09,810 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-11-23 02:18:09,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 02:18:09,810 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:18:09,810 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-11-23 02:18:09,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:18:10,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:18:10,017 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:18:10,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:18:10,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1805796550, now seen corresponding path program 1 times [2021-11-23 02:18:10,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:18:10,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [808326254] [2021-11-23 02:18:10,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:18:10,020 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:18:10,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:18:10,022 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:18:10,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 02:18:10,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:18:10,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:18:10,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:18:10,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:18:10,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:18:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:18:10,275 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:18:10,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [808326254] [2021-11-23 02:18:10,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [808326254] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:18:10,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [18817156] [2021-11-23 02:18:10,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:18:10,277 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:18:10,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:18:10,285 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:18:10,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-23 02:18:10,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:18:10,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:18:10,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:18:10,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:18:10,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:18:10,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:18:10,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [18817156] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:18:10,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293334517] [2021-11-23 02:18:10,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:18:10,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:18:10,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:18:10,619 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:18:10,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:18:10,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:18:10,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:18:10,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:18:10,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:18:10,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:18:10,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:18:10,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293334517] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:18:10,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:18:10,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-23 02:18:10,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470104388] [2021-11-23 02:18:10,781 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:18:10,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:18:10,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:18:10,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:18:10,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:18:10,784 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:18:11,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:18:11,270 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2021-11-23 02:18:11,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:18:11,275 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 02:18:11,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:18:11,275 INFO L225 Difference]: With dead ends: 15 [2021-11-23 02:18:11,276 INFO L226 Difference]: Without dead ends: 12 [2021-11-23 02:18:11,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:18:11,278 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:18:11,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:18:11,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-23 02:18:11,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-23 02:18:11,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:18:11,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-11-23 02:18:11,282 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 7 [2021-11-23 02:18:11,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:18:11,283 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-11-23 02:18:11,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:18:11,283 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-11-23 02:18:11,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 02:18:11,283 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:18:11,283 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1] [2021-11-23 02:18:11,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:18:11,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:18:11,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-23 02:18:11,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:18:11,885 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:18:11,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:18:11,886 INFO L85 PathProgramCache]: Analyzing trace with hash 555748550, now seen corresponding path program 2 times [2021-11-23 02:18:11,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:18:11,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [212893536] [2021-11-23 02:18:11,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:18:11,887 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:18:11,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:18:11,888 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:18:11,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 02:18:12,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:18:12,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:18:12,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:18:12,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:18:31,494 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:18:31,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:19:18,944 WARN L860 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from true [2021-11-23 02:19:24,817 WARN L838 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from false [2021-11-23 02:19:26,838 WARN L860 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from true [2021-11-23 02:19:31,032 WARN L838 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from false [2021-11-23 02:19:33,057 WARN L860 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from true [2021-11-23 02:19:36,128 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 3 times theorem prover too weak. 0 trivial. 15 not checked. [2021-11-23 02:19:36,128 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:19:36,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [212893536] [2021-11-23 02:19:36,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [212893536] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:19:36,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [87961890] [2021-11-23 02:19:36,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:19:36,129 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:19:36,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:19:36,131 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:19:36,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-23 02:19:36,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:19:36,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:19:36,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:19:36,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:19:40,551 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:19:40,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:20:00,781 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 3 times theorem prover too weak. 0 trivial. 15 not checked. [2021-11-23 02:20:00,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [87961890] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:20:00,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906175389] [2021-11-23 02:20:00,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:20:00,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:20:00,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:20:00,783 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:20:00,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:20:00,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:20:00,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:20:00,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 02:20:00,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:20:24,824 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:20:24,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:20:48,398 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:20:48,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906175389] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:20:48,398 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:20:48,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 33 [2021-11-23 02:20:48,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416779398] [2021-11-23 02:20:48,399 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:20:48,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-23 02:20:48,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:20:48,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-23 02:20:48,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=726, Unknown=17, NotChecked=174, Total=1056 [2021-11-23 02:20:48,403 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 33 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 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 02:20:51,719 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:20:53,025 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:21:01,906 WARN L860 $PredicateComparison]: unable to prove that (and (= (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (_ +zero 11 53)) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__time~0#1|) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (= ((_ to_fp 8 24) c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 2500000037252903.0 25000000000000000.0))) |c_ULTIMATE.start_main_~main__tick~0#1|) (= c_currentRoundingMode roundNearestTiesToEven) (= |c_ULTIMATE.start_main_~main__i~0#1| (_ bv1 32))) is different from true [2021-11-23 02:21:03,929 WARN L860 $PredicateComparison]: unable to prove that (and (= (_ bv2 32) |c_ULTIMATE.start_main_~main__i~0#1|) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (= (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (_ +zero 11 53)) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__time~0#1|) (= ((_ to_fp 8 24) c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 2500000037252903.0 25000000000000000.0))) |c_ULTIMATE.start_main_~main__tick~0#1|) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-23 02:21:12,993 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse3 (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|))) (let ((.cse0 (fp.add c_currentRoundingMode .cse3 |c_ULTIMATE.start_main_~main__tick~0#1|)) (.cse1 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 |c_ULTIMATE.start_main_~main__tick~0#1|)) .cse1)) (= (_ bv6 32) |c_ULTIMATE.start_main_~main__i~0#1|) (= (let ((.cse2 ((_ to_fp 8 24) c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 2500000037252903.0 25000000000000000.0))))) (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (_ +zero 11 53)) .cse2) .cse2) .cse2) .cse2) .cse2) .cse2)) |c_ULTIMATE.start_main_~main__time~0#1|) (= c_currentRoundingMode roundNearestTiesToEven) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode .cse0) .cse1)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode .cse3) .cse1))))) is different from true [2021-11-23 02:21:15,547 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|)) (.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1|) .cse0)) (bvslt |c_ULTIMATE.start_main_~main__i~0#1| (_ bv10 32)) (bvslt (bvadd (_ bv2 32) |c_ULTIMATE.start_main_~main__i~0#1|) (_ bv10 32)) (bvslt (bvadd |c_ULTIMATE.start_main_~main__i~0#1| (_ bv1 32)) (_ bv10 32)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode .cse1 |c_ULTIMATE.start_main_~main__tick~0#1|)) .cse0)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode .cse1) .cse0)))) is different from true [2021-11-23 02:21:33,378 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 02:21:35,390 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 02:21:37,455 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 02:21:44,947 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 02:21:46,798 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 02:21:49,670 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 02:21:50,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:21:50,699 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2021-11-23 02:21:50,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 02:21:50,699 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 02:21:50,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:21:50,700 INFO L225 Difference]: With dead ends: 19 [2021-11-23 02:21:50,700 INFO L226 Difference]: Without dead ends: 16 [2021-11-23 02:21:50,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 147.9s TimeCoverageRelationStatistics Valid=227, Invalid=1037, Unknown=24, NotChecked=518, Total=1806 [2021-11-23 02:21:50,703 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 19 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 24.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:21:50,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 50 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 109 Invalid, 5 Unknown, 33 Unchecked, 24.3s Time] [2021-11-23 02:21:50,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-23 02:21:50,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-23 02:21:50,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 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 02:21:50,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-11-23 02:21:50,708 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 11 [2021-11-23 02:21:50,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:21:50,708 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-11-23 02:21:50,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 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 02:21:50,709 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-11-23 02:21:50,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 02:21:50,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:21:50,710 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1] [2021-11-23 02:21:50,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:21:50,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:21:51,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:21:51,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:21:51,311 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:21:51,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:21:51,312 INFO L85 PathProgramCache]: Analyzing trace with hash -763767610, now seen corresponding path program 3 times [2021-11-23 02:21:51,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:21:51,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [519756226] [2021-11-23 02:21:51,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:21:51,313 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:21:51,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:21:51,314 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:21:51,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 02:21:51,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-23 02:21:51,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:21:51,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 02:21:51,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:22:46,021 WARN L227 SmtUtils]: Spent 5.16s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:23:14,320 WARN L227 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:23:20,509 WARN L860 $PredicateComparison]: unable to prove that (and (= c_currentRoundingMode roundNearestTiesToEven) (= (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 2500000037252903.0 25000000000000000.0))))) (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (_ +zero 11 53)) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0)) |c_ULTIMATE.start_main_~main__time~0#1|)) is different from true [2021-11-23 02:23:20,598 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 37 refuted. 8 times theorem prover too weak. 0 trivial. 10 not checked. [2021-11-23 02:23:20,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:23:46,724 WARN L860 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from true [2021-11-23 02:23:52,503 WARN L860 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from true [2021-11-23 02:24:00,101 WARN L860 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from true [2021-11-23 02:24:06,142 WARN L860 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from true [2021-11-23 02:24:09,848 WARN L838 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from false [2021-11-23 02:24:11,885 WARN L860 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from true [2021-11-23 02:24:18,006 WARN L838 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from false [2021-11-23 02:24:20,047 WARN L860 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from true [2021-11-23 02:24:26,188 WARN L838 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from false [2021-11-23 02:24:28,233 WARN L860 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from true [2021-11-23 02:24:34,393 WARN L838 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from false [2021-11-23 02:24:36,447 WARN L860 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from true [2021-11-23 02:24:42,591 WARN L838 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 2500000037252903.0 25000000000000000.0))))) (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (_ +zero 11 53)) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0))) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from false [2021-11-23 02:24:44,638 WARN L860 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 2500000037252903.0 25000000000000000.0))))) (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (_ +zero 11 53)) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0))) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from true [2021-11-23 02:24:44,639 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 52 not checked. [2021-11-23 02:24:44,639 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:24:44,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [519756226] [2021-11-23 02:24:44,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [519756226] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:24:44,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [616016377] [2021-11-23 02:24:44,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:24:44,640 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:24:44,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:24:44,649 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:24:44,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-23 02:24:45,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-23 02:24:45,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:24:45,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 02:24:45,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:25:13,079 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 37 refuted. 8 times theorem prover too weak. 0 trivial. 10 not checked. [2021-11-23 02:25:13,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:25:46,051 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 52 not checked. [2021-11-23 02:25:46,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [616016377] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:25:46,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647678274] [2021-11-23 02:25:46,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:25:46,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:25:46,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:25:46,054 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:25:46,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 02:25:48,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-23 02:25:48,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:25:48,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 02:25:48,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:26:15,160 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 37 refuted. 8 times theorem prover too weak. 0 trivial. 10 not checked. [2021-11-23 02:26:15,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:26:51,840 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 52 not checked. [2021-11-23 02:26:51,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647678274] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:26:51,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:26:51,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 14, 14] total 27 [2021-11-23 02:26:51,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644151985] [2021-11-23 02:26:51,841 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:26:51,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-23 02:26:51,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:26:51,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-23 02:26:51,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=229, Unknown=23, NotChecked=410, Total=756 [2021-11-23 02:26:51,843 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 28 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 27 states have internal predecessors, (29), 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 02:26:54,394 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:26:56,466 WARN L860 $PredicateComparison]: unable to prove that (and (= c_currentRoundingMode roundNearestTiesToEven) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 2500000037252903.0 25000000000000000.0))))) (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (_ +zero 11 53)) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0))) ((_ to_fp 11 53) c_currentRoundingMode 1.0)))) is different from true [2021-11-23 02:26:58,523 WARN L860 $PredicateComparison]: unable to prove that (and (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (= ((_ to_fp 8 24) c_currentRoundingMode (_ +zero 11 53)) |c_ULTIMATE.start_main_~main__time~0#1|) (= ((_ to_fp 8 24) c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 2500000037252903.0 25000000000000000.0))) |c_ULTIMATE.start_main_~main__tick~0#1|) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-23 02:27:00,579 WARN L860 $PredicateComparison]: unable to prove that (and (= (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (_ +zero 11 53)) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__time~0#1|) (= ((_ to_fp 8 24) c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 2500000037252903.0 25000000000000000.0))) |c_ULTIMATE.start_main_~main__tick~0#1|) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-23 02:27:02,627 WARN L860 $PredicateComparison]: unable to prove that (and (= (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (_ +zero 11 53)) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__time~0#1|) (= ((_ to_fp 8 24) c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 2500000037252903.0 25000000000000000.0))) |c_ULTIMATE.start_main_~main__tick~0#1|) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-23 02:27:04,685 WARN L860 $PredicateComparison]: unable to prove that (and (= (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (_ +zero 11 53)) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__time~0#1|) (= ((_ to_fp 8 24) c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 2500000037252903.0 25000000000000000.0))) |c_ULTIMATE.start_main_~main__tick~0#1|) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-23 02:27:06,727 WARN L860 $PredicateComparison]: unable to prove that (and (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (= ((_ to_fp 8 24) c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 2500000037252903.0 25000000000000000.0))) |c_ULTIMATE.start_main_~main__tick~0#1|) (= c_currentRoundingMode roundNearestTiesToEven) (= (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (_ +zero 11 53)) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__time~0#1|)) is different from true [2021-11-23 02:27:08,764 WARN L860 $PredicateComparison]: unable to prove that (and (= (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (_ +zero 11 53)) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__time~0#1|) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (= ((_ to_fp 8 24) c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 2500000037252903.0 25000000000000000.0))) |c_ULTIMATE.start_main_~main__tick~0#1|) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-23 02:27:10,865 WARN L860 $PredicateComparison]: unable to prove that (and (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (= ((_ to_fp 8 24) c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 2500000037252903.0 25000000000000000.0))) |c_ULTIMATE.start_main_~main__tick~0#1|) (= |c_ULTIMATE.start_main_~main__time~0#1| (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (_ +zero 11 53)) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-23 02:27:30,582 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|)) (.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1|) .cse0)) (= c_currentRoundingMode roundNearestTiesToEven) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode .cse1 |c_ULTIMATE.start_main_~main__tick~0#1|)) .cse0)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode .cse1) .cse0)) (= (let ((.cse2 ((_ to_fp 8 24) c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 2500000037252903.0 25000000000000000.0))))) (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (_ +zero 11 53)) .cse2) .cse2) .cse2) .cse2) .cse2) .cse2) .cse2) .cse2) .cse2) .cse2)) |c_ULTIMATE.start_main_~main__time~0#1|))) is different from true [2021-11-23 02:27:42,839 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 02:27:45,230 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 02:27:47,574 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 02:27:49,798 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 02:28:00,681 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 02:28:06,625 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 02:28:06,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:06,656 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-11-23 02:28:06,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 02:28:06,657 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-23 02:28:06,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:06,658 INFO L225 Difference]: With dead ends: 24 [2021-11-23 02:28:06,658 INFO L226 Difference]: Without dead ends: 19 [2021-11-23 02:28:06,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 19 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 172.3s TimeCoverageRelationStatistics Valid=139, Invalid=324, Unknown=33, NotChecked=1064, Total=1560 [2021-11-23 02:28:06,660 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 7 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 17.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:06,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 21 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 55 Invalid, 7 Unknown, 99 Unchecked, 17.9s Time] [2021-11-23 02:28:06,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-23 02:28:06,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-23 02:28:06,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:28:06,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-11-23 02:28:06,668 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 15 [2021-11-23 02:28:06,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:06,669 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-11-23 02:28:06,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 27 states have internal predecessors, (29), 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 02:28:06,670 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-11-23 02:28:06,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 02:28:06,671 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:06,671 INFO L514 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1] [2021-11-23 02:28:06,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-23 02:28:06,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 02:28:07,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-23 02:28:07,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:28:07,274 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:07,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:07,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1273818086, now seen corresponding path program 4 times [2021-11-23 02:28:07,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:28:07,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [301866798] [2021-11-23 02:28:07,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:28:07,275 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:28:07,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:28:07,277 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:28:07,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 02:28:07,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:28:07,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:28:07,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:28:07,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:28:08,213 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 33 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 02:28:08,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:28:09,356 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 33 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 02:28:09,356 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:28:09,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [301866798] [2021-11-23 02:28:09,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [301866798] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:28:09,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [142284761] [2021-11-23 02:28:09,357 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:28:09,357 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:28:09,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:28:09,358 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:28:09,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-23 02:28:10,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:28:10,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:28:10,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:28:10,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:28:10,138 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 33 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 02:28:10,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:28:10,264 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 33 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 02:28:10,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [142284761] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:28:10,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797561425] [2021-11-23 02:28:10,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:28:10,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:28:10,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:28:10,269 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:28:10,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 02:28:10,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:28:10,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:28:10,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 02:28:10,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:28:10,811 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 13 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:28:10,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:28:13,254 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:28:13,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797561425] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:28:13,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:28:13,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 15, 16] total 40 [2021-11-23 02:28:13,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479161854] [2021-11-23 02:28:13,256 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:28:13,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-23 02:28:13,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:28:13,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-23 02:28:13,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=1138, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 02:28:13,259 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 40 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 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 02:28:13,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:13,924 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2021-11-23 02:28:13,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 02:28:13,930 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-23 02:28:13,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:13,930 INFO L225 Difference]: With dead ends: 19 [2021-11-23 02:28:13,930 INFO L226 Difference]: Without dead ends: 0 [2021-11-23 02:28:13,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=422, Invalid=1138, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 02:28:13,933 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:13,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 02:28:13,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-23 02:28:13,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-23 02:28:13,935 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 02:28:13,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-23 02:28:13,935 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2021-11-23 02:28:13,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:13,936 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-23 02:28:13,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 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 02:28:13,936 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-23 02:28:13,937 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-23 02:28:13,939 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 02:28:13,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-23 02:28:14,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 02:28:14,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 02:28:14,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaeaa1e6-f769-45fc-b15d-7f9b4dc1d8d1/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:28:14,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.