./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI --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 2e6e06de31959e386aafc2fb45c848364ae9fea32df4ba40928c607f134f313f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:29:55,581 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:29:55,583 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:29:55,635 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:29:55,635 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:29:55,640 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:29:55,643 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:29:55,648 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:29:55,651 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:29:55,657 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:29:55,658 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:29:55,662 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:29:55,662 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:29:55,666 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:29:55,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:29:55,675 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:29:55,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:29:55,678 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:29:55,679 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:29:55,683 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:29:55,690 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:29:55,692 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:29:55,693 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:29:55,696 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:29:55,704 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:29:55,709 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:29:55,709 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:29:55,711 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:29:55,712 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:29:55,714 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:29:55,715 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:29:55,716 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:29:55,717 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:29:55,719 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:29:55,721 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:29:55,722 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:29:55,723 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:29:55,723 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:29:55,723 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:29:55,724 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:29:55,725 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:29:55,726 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:29:55,784 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:29:55,784 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:29:55,785 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:29:55,785 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:29:55,786 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:29:55,787 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:29:55,787 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:29:55,787 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:29:55,788 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:29:55,788 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:29:55,789 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:29:55,790 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:29:55,790 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:29:55,790 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:29:55,790 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:29:55,791 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:29:55,791 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:29:55,791 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:29:55,792 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:29:55,792 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:29:55,793 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:29:55,793 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:29:55,793 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:29:55,793 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:29:55,794 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:29:55,794 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:29:55,794 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:29:55,794 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:29:55,795 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:29:55,795 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:29:55,795 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:29:55,796 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:29:55,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:29:55,796 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:29:55,797 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:29:55,797 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:29:55,797 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:29:55,797 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:29:55,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:29:55,798 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:29:55,798 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:29:55,798 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e6e06de31959e386aafc2fb45c848364ae9fea32df4ba40928c607f134f313f [2022-11-03 02:29:56,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:29:56,156 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:29:56,173 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:29:56,174 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:29:56,175 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:29:56,177 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c [2022-11-03 02:29:56,269 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/data/a4f108557/06266dab58fa4c6bb1de1f212c6c298d/FLAG32fab3844 [2022-11-03 02:29:56,829 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:29:56,831 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c [2022-11-03 02:29:56,854 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/data/a4f108557/06266dab58fa4c6bb1de1f212c6c298d/FLAG32fab3844 [2022-11-03 02:29:57,143 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/data/a4f108557/06266dab58fa4c6bb1de1f212c6c298d [2022-11-03 02:29:57,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:29:57,147 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:29:57,154 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:29:57,155 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:29:57,159 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:29:57,160 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:29:57" (1/1) ... [2022-11-03 02:29:57,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c191f11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:57, skipping insertion in model container [2022-11-03 02:29:57,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:29:57" (1/1) ... [2022-11-03 02:29:57,170 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:29:57,194 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:29:57,382 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_8503c08c-7a64-4d18-ac75-96d242ec329e/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c[730,743] [2022-11-03 02:29:57,447 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:29:57,458 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:29:57,474 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_8503c08c-7a64-4d18-ac75-96d242ec329e/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c[730,743] [2022-11-03 02:29:57,514 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:29:57,531 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:29:57,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:57 WrapperNode [2022-11-03 02:29:57,532 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:29:57,533 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:29:57,533 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:29:57,534 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:29:57,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:57" (1/1) ... [2022-11-03 02:29:57,554 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:57" (1/1) ... [2022-11-03 02:29:57,584 INFO L138 Inliner]: procedures = 17, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 147 [2022-11-03 02:29:57,584 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:29:57,585 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:29:57,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:29:57,586 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:29:57,598 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:57" (1/1) ... [2022-11-03 02:29:57,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:57" (1/1) ... [2022-11-03 02:29:57,601 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:57" (1/1) ... [2022-11-03 02:29:57,601 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:57" (1/1) ... [2022-11-03 02:29:57,610 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:57" (1/1) ... [2022-11-03 02:29:57,616 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:57" (1/1) ... [2022-11-03 02:29:57,618 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:57" (1/1) ... [2022-11-03 02:29:57,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:57" (1/1) ... [2022-11-03 02:29:57,623 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:29:57,624 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:29:57,624 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:29:57,624 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:29:57,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:57" (1/1) ... [2022-11-03 02:29:57,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:29:57,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:29:57,666 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:29:57,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:29:57,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:29:57,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:29:57,731 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-11-03 02:29:57,731 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-11-03 02:29:57,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:29:57,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:29:57,732 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 02:29:57,732 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 02:29:57,825 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:29:57,828 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:29:58,346 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:29:58,580 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:29:58,580 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 02:29:58,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:29:58 BoogieIcfgContainer [2022-11-03 02:29:58,584 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:29:58,600 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:29:58,601 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:29:58,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:29:58,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:29:57" (1/3) ... [2022-11-03 02:29:58,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a457d46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:29:58, skipping insertion in model container [2022-11-03 02:29:58,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:29:57" (2/3) ... [2022-11-03 02:29:58,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a457d46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:29:58, skipping insertion in model container [2022-11-03 02:29:58,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:29:58" (3/3) ... [2022-11-03 02:29:58,610 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_1-3a.c.cil.c [2022-11-03 02:29:58,628 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:29:58,629 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:29:58,687 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:29:58,695 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5794b089, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:29:58,695 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:29:58,704 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 37 states have internal predecessors, (52), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-03 02:29:58,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-03 02:29:58,715 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:29:58,716 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:29:58,725 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:29:58,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:29:58,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1511064706, now seen corresponding path program 1 times [2022-11-03 02:29:58,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:29:58,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498568156] [2022-11-03 02:29:58,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:58,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:29:59,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:59,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:29:59,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:29:59,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498568156] [2022-11-03 02:29:59,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498568156] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:29:59,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:29:59,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:29:59,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63952875] [2022-11-03 02:29:59,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:29:59,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:29:59,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:29:59,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:29:59,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:29:59,909 INFO L87 Difference]: Start difference. First operand has 47 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 37 states have internal predecessors, (52), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 02:30:00,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:00,248 INFO L93 Difference]: Finished difference Result 133 states and 221 transitions. [2022-11-03 02:30:00,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:30:00,253 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-11-03 02:30:00,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:00,272 INFO L225 Difference]: With dead ends: 133 [2022-11-03 02:30:00,274 INFO L226 Difference]: Without dead ends: 82 [2022-11-03 02:30:00,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:30:00,285 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 51 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:00,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 504 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:30:00,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-03 02:30:00,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 51. [2022-11-03 02:30:00,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 39 states have internal predecessors, (51), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) [2022-11-03 02:30:00,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 74 transitions. [2022-11-03 02:30:00,363 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 74 transitions. Word has length 24 [2022-11-03 02:30:00,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:00,364 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 74 transitions. [2022-11-03 02:30:00,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 02:30:00,365 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 74 transitions. [2022-11-03 02:30:00,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 02:30:00,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:00,369 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:00,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:30:00,370 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:00,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:00,372 INFO L85 PathProgramCache]: Analyzing trace with hash 105677899, now seen corresponding path program 1 times [2022-11-03 02:30:00,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:00,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182451620] [2022-11-03 02:30:00,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:00,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:00,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:00,726 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:30:00,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:00,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182451620] [2022-11-03 02:30:00,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182451620] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:00,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:00,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:30:00,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746970547] [2022-11-03 02:30:00,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:00,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:30:00,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:00,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:30:00,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:30:00,733 INFO L87 Difference]: Start difference. First operand 51 states and 74 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:30:00,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:00,849 INFO L93 Difference]: Finished difference Result 82 states and 117 transitions. [2022-11-03 02:30:00,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:30:00,850 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2022-11-03 02:30:00,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:00,856 INFO L225 Difference]: With dead ends: 82 [2022-11-03 02:30:00,856 INFO L226 Difference]: Without dead ends: 69 [2022-11-03 02:30:00,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:30:00,864 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 17 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:00,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 330 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:30:00,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-03 02:30:00,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2022-11-03 02:30:00,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 49 states have internal predecessors, (67), 13 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (16), 14 states have call predecessors, (16), 12 states have call successors, (16) [2022-11-03 02:30:00,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 96 transitions. [2022-11-03 02:30:00,892 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 96 transitions. Word has length 27 [2022-11-03 02:30:00,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:00,895 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 96 transitions. [2022-11-03 02:30:00,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:30:00,895 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 96 transitions. [2022-11-03 02:30:00,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 02:30:00,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:00,900 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:00,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:30:00,901 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:00,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:00,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1837782345, now seen corresponding path program 1 times [2022-11-03 02:30:00,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:00,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402418935] [2022-11-03 02:30:00,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:00,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:01,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:02,275 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:30:02,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:02,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402418935] [2022-11-03 02:30:02,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402418935] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:02,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:02,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-11-03 02:30:02,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307018752] [2022-11-03 02:30:02,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:02,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 02:30:02,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:02,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 02:30:02,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:30:02,279 INFO L87 Difference]: Start difference. First operand 65 states and 96 transitions. Second operand has 17 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:30:03,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:03,374 INFO L93 Difference]: Finished difference Result 148 states and 219 transitions. [2022-11-03 02:30:03,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:30:03,376 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2022-11-03 02:30:03,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:03,383 INFO L225 Difference]: With dead ends: 148 [2022-11-03 02:30:03,384 INFO L226 Difference]: Without dead ends: 140 [2022-11-03 02:30:03,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2022-11-03 02:30:03,392 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 137 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:03,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 984 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:30:03,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-03 02:30:03,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 75. [2022-11-03 02:30:03,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 56 states have (on average 1.3571428571428572) internal successors, (76), 56 states have internal predecessors, (76), 15 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (20), 17 states have call predecessors, (20), 14 states have call successors, (20) [2022-11-03 02:30:03,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 111 transitions. [2022-11-03 02:30:03,420 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 111 transitions. Word has length 28 [2022-11-03 02:30:03,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:03,421 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 111 transitions. [2022-11-03 02:30:03,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:30:03,421 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 111 transitions. [2022-11-03 02:30:03,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 02:30:03,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:03,431 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:03,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:30:03,431 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:03,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:03,432 INFO L85 PathProgramCache]: Analyzing trace with hash 8886071, now seen corresponding path program 1 times [2022-11-03 02:30:03,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:03,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365834107] [2022-11-03 02:30:03,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:03,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:03,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:03,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:30:03,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:03,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365834107] [2022-11-03 02:30:03,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365834107] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:30:03,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15044970] [2022-11-03 02:30:03,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:03,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:03,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:03,800 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:03,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:30:03,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:03,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 02:30:03,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:04,094 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:30:04,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:04,649 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:30:04,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15044970] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:04,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1335817193] [2022-11-03 02:30:04,673 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-03 02:30:04,673 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:30:04,678 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:30:04,685 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:30:04,686 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:30:05,774 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 51 for LOIs [2022-11-03 02:30:05,848 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 60 for LOIs [2022-11-03 02:30:06,048 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:30:10,794 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1037#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:30:10,794 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:30:10,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:30:10,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 14 [2022-11-03 02:30:10,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437075721] [2022-11-03 02:30:10,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:30:10,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 02:30:10,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:10,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 02:30:10,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2022-11-03 02:30:10,797 INFO L87 Difference]: Start difference. First operand 75 states and 111 transitions. Second operand has 14 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-03 02:30:11,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:11,315 INFO L93 Difference]: Finished difference Result 169 states and 251 transitions. [2022-11-03 02:30:11,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:30:11,316 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 28 [2022-11-03 02:30:11,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:11,317 INFO L225 Difference]: With dead ends: 169 [2022-11-03 02:30:11,317 INFO L226 Difference]: Without dead ends: 96 [2022-11-03 02:30:11,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2022-11-03 02:30:11,320 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 41 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:11,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 616 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:30:11,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-03 02:30:11,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 66. [2022-11-03 02:30:11,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 51 states have internal predecessors, (67), 10 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (15), 12 states have call predecessors, (15), 9 states have call successors, (15) [2022-11-03 02:30:11,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 92 transitions. [2022-11-03 02:30:11,332 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 92 transitions. Word has length 28 [2022-11-03 02:30:11,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:11,332 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 92 transitions. [2022-11-03 02:30:11,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-03 02:30:11,333 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 92 transitions. [2022-11-03 02:30:11,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-03 02:30:11,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:11,334 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:11,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:11,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:11,549 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:11,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:11,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1624199194, now seen corresponding path program 1 times [2022-11-03 02:30:11,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:11,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818027344] [2022-11-03 02:30:11,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:11,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:11,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:30:11,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:11,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818027344] [2022-11-03 02:30:11,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818027344] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:30:11,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422764156] [2022-11-03 02:30:11,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:11,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:11,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:11,832 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:11,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:30:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:11,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:30:11,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:12,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:30:12,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:12,294 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:30:12,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422764156] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:12,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1216872690] [2022-11-03 02:30:12,301 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-03 02:30:12,301 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:30:12,303 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:30:12,303 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:30:12,303 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:30:12,615 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 60 for LOIs [2022-11-03 02:30:12,659 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:30:15,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1216872690] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:15,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:30:15,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [10, 9, 8] total 33 [2022-11-03 02:30:15,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223113169] [2022-11-03 02:30:15,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:15,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 02:30:15,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:15,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 02:30:15,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=896, Unknown=0, NotChecked=0, Total=1056 [2022-11-03 02:30:15,097 INFO L87 Difference]: Start difference. First operand 66 states and 92 transitions. Second operand has 15 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:30:15,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:15,935 INFO L93 Difference]: Finished difference Result 112 states and 156 transitions. [2022-11-03 02:30:15,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 02:30:15,935 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2022-11-03 02:30:15,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:15,937 INFO L225 Difference]: With dead ends: 112 [2022-11-03 02:30:15,937 INFO L226 Difference]: Without dead ends: 96 [2022-11-03 02:30:15,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=160, Invalid=896, Unknown=0, NotChecked=0, Total=1056 [2022-11-03 02:30:15,939 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 88 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:15,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 253 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:30:15,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-03 02:30:15,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2022-11-03 02:30:15,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 states have internal predecessors, (68), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (17), 13 states have call predecessors, (17), 10 states have call successors, (17) [2022-11-03 02:30:15,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 96 transitions. [2022-11-03 02:30:15,959 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 96 transitions. Word has length 29 [2022-11-03 02:30:15,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:15,959 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 96 transitions. [2022-11-03 02:30:15,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:30:15,960 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 96 transitions. [2022-11-03 02:30:15,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 02:30:15,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:15,961 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:15,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:16,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:16,165 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:16,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:16,165 INFO L85 PathProgramCache]: Analyzing trace with hash -2033780362, now seen corresponding path program 1 times [2022-11-03 02:30:16,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:16,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423350394] [2022-11-03 02:30:16,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:16,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:16,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:16,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:30:16,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:16,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423350394] [2022-11-03 02:30:16,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423350394] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:30:16,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090229027] [2022-11-03 02:30:16,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:16,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:16,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:16,475 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:16,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:30:16,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:16,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:30:16,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:30:16,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:16,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:30:16,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090229027] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:16,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [334744156] [2022-11-03 02:30:16,787 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-03 02:30:16,787 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:30:16,788 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:30:16,788 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:30:16,788 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:30:17,360 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 60 for LOIs [2022-11-03 02:30:17,481 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:30:20,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [334744156] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:20,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:30:20,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [9, 9, 7] total 36 [2022-11-03 02:30:20,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329644037] [2022-11-03 02:30:20,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:20,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 02:30:20,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:20,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 02:30:20,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 02:30:20,935 INFO L87 Difference]: Start difference. First operand 68 states and 96 transitions. Second operand has 19 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 14 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:30:25,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:25,146 INFO L93 Difference]: Finished difference Result 102 states and 145 transitions. [2022-11-03 02:30:25,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:30:25,147 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 14 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2022-11-03 02:30:25,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:25,148 INFO L225 Difference]: With dead ends: 102 [2022-11-03 02:30:25,148 INFO L226 Difference]: Without dead ends: 89 [2022-11-03 02:30:25,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=231, Invalid=1839, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 02:30:25,150 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 145 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:25,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 143 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:30:25,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-03 02:30:25,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2022-11-03 02:30:25,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 50 states have internal predecessors, (65), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (17), 12 states have call predecessors, (17), 10 states have call successors, (17) [2022-11-03 02:30:25,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 93 transitions. [2022-11-03 02:30:25,174 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 93 transitions. Word has length 31 [2022-11-03 02:30:25,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:25,175 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 93 transitions. [2022-11-03 02:30:25,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 14 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:30:25,175 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 93 transitions. [2022-11-03 02:30:25,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-03 02:30:25,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:25,176 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:25,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:25,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:25,393 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:25,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:25,393 INFO L85 PathProgramCache]: Analyzing trace with hash 558488300, now seen corresponding path program 1 times [2022-11-03 02:30:25,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:25,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551930031] [2022-11-03 02:30:25,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:25,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:25,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:26,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:30:26,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:26,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551930031] [2022-11-03 02:30:26,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551930031] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:30:26,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042329530] [2022-11-03 02:30:26,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:26,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:26,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:26,643 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:26,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:30:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:26,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 02:30:26,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:27,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:30:27,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:27,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042329530] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:27,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:30:27,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [16] total 19 [2022-11-03 02:30:27,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811173590] [2022-11-03 02:30:27,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:27,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:30:27,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:27,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:30:27,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:30:27,066 INFO L87 Difference]: Start difference. First operand 65 states and 93 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:30:27,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:27,369 INFO L93 Difference]: Finished difference Result 81 states and 113 transitions. [2022-11-03 02:30:27,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:30:27,370 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2022-11-03 02:30:27,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:27,372 INFO L225 Difference]: With dead ends: 81 [2022-11-03 02:30:27,372 INFO L226 Difference]: Without dead ends: 55 [2022-11-03 02:30:27,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-11-03 02:30:27,374 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 53 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:27,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 327 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:30:27,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-03 02:30:27,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-11-03 02:30:27,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 40 states have (on average 1.3) internal successors, (52), 43 states have internal predecessors, (52), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-03 02:30:27,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2022-11-03 02:30:27,402 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 32 [2022-11-03 02:30:27,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:27,403 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2022-11-03 02:30:27,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:30:27,403 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2022-11-03 02:30:27,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-03 02:30:27,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:27,408 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:27,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:27,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:27,633 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:27,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:27,633 INFO L85 PathProgramCache]: Analyzing trace with hash 30514604, now seen corresponding path program 2 times [2022-11-03 02:30:27,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:27,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265658324] [2022-11-03 02:30:27,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:27,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:27,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:30:27,745 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:30:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:30:27,857 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:30:27,857 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:30:27,859 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:30:27,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:30:27,865 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:27,869 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:30:27,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:30:27 BoogieIcfgContainer [2022-11-03 02:30:27,917 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:30:27,920 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:30:27,921 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:30:27,921 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:30:27,922 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:29:58" (3/4) ... [2022-11-03 02:30:27,925 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:30:27,925 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:30:27,926 INFO L158 Benchmark]: Toolchain (without parser) took 30778.93ms. Allocated memory was 96.5MB in the beginning and 197.1MB in the end (delta: 100.7MB). Free memory was 60.5MB in the beginning and 161.9MB in the end (delta: -101.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:30:27,926 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 96.5MB. Free memory was 68.2MB in the beginning and 68.1MB in the end (delta: 28.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:30:27,927 INFO L158 Benchmark]: CACSL2BoogieTranslator took 377.89ms. Allocated memory was 96.5MB in the beginning and 136.3MB in the end (delta: 39.8MB). Free memory was 60.4MB in the beginning and 106.3MB in the end (delta: -45.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-03 02:30:27,927 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.60ms. Allocated memory is still 136.3MB. Free memory was 106.3MB in the beginning and 104.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:30:27,928 INFO L158 Benchmark]: Boogie Preprocessor took 37.68ms. Allocated memory is still 136.3MB. Free memory was 104.2MB in the beginning and 102.9MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:30:27,928 INFO L158 Benchmark]: RCFGBuilder took 959.96ms. Allocated memory is still 136.3MB. Free memory was 102.5MB in the beginning and 74.4MB in the end (delta: 28.1MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2022-11-03 02:30:27,930 INFO L158 Benchmark]: TraceAbstraction took 29316.75ms. Allocated memory was 136.3MB in the beginning and 197.1MB in the end (delta: 60.8MB). Free memory was 110.5MB in the beginning and 161.9MB in the end (delta: -51.4MB). Peak memory consumption was 118.3MB. Max. memory is 16.1GB. [2022-11-03 02:30:27,930 INFO L158 Benchmark]: Witness Printer took 5.16ms. Allocated memory is still 197.1MB. Free memory is still 161.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:30:27,932 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 96.5MB. Free memory was 68.2MB in the beginning and 68.1MB in the end (delta: 28.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 377.89ms. Allocated memory was 96.5MB in the beginning and 136.3MB in the end (delta: 39.8MB). Free memory was 60.4MB in the beginning and 106.3MB in the end (delta: -45.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 51.60ms. Allocated memory is still 136.3MB. Free memory was 106.3MB in the beginning and 104.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.68ms. Allocated memory is still 136.3MB. Free memory was 104.2MB in the beginning and 102.9MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 959.96ms. Allocated memory is still 136.3MB. Free memory was 102.5MB in the beginning and 74.4MB in the end (delta: 28.1MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * TraceAbstraction took 29316.75ms. Allocated memory was 136.3MB in the beginning and 197.1MB in the end (delta: 60.8MB). Free memory was 110.5MB in the beginning and 161.9MB in the end (delta: -51.4MB). Peak memory consumption was 118.3MB. Max. memory is 16.1GB. * Witness Printer took 5.16ms. Allocated memory is still 197.1MB. Free memory is still 161.9MB. 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: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 110, overapproximation of bitwiseAnd at line 108, overapproximation of bitwiseComplement at line 76. Possible FailurePath: [L226] unsigned int a ; [L227] unsigned int ma = __VERIFIER_nondet_uint(); [L228] signed char ea = __VERIFIER_nondet_char(); [L229] unsigned int b ; [L230] unsigned int mb = __VERIFIER_nondet_uint(); [L231] signed char eb = __VERIFIER_nondet_char(); [L232] unsigned int r_add ; [L233] unsigned int zero ; [L234] int sa ; [L235] int sb ; [L236] int tmp ; [L237] int tmp___0 ; [L238] int tmp___1 ; [L239] int tmp___2 ; [L240] int tmp___3 ; [L241] int tmp___4 ; [L242] int tmp___5 ; [L243] int tmp___6 ; [L244] int tmp___7 ; [L245] int tmp___8 ; [L246] int tmp___9 ; [L247] int __retres23 ; VAL [ea=-125, eb=-126] [L251] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L29] COND TRUE ! m [L30] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L80] return (__retres4); [L251] RET, EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0, ea=-125, eb=-126] [L251] zero = base2flt(0, 0) [L252] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=-125, \old(m)=16777216] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=-125, \old(m)=16777216, e=-125, m=16777216] [L29] COND FALSE !(! m) VAL [\old(e)=-125, \old(m)=16777216, e=-125, m=16777216] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=-125, \old(m)=16777216, e=-125, m=16777216] [L57] COND TRUE 1 VAL [\old(e)=-125, \old(m)=16777216, e=-125, m=16777216] [L59] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=-125, \old(m)=16777216, e=-125, m=16777216] [L76] m = m & ~ (1U << 24U) [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=-125, \old(m)=16777216, __retres4=1, e=-125, m=16777216, res=1] [L80] return (__retres4); [L252] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=1, ea=-125, eb=-126, ma=16777216, zero=0] [L252] a = base2flt(ma, ea) [L253] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=-126, \old(m)=16777217] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=-126, \old(m)=16777217, e=-126, m=16777217] [L29] COND FALSE !(! m) VAL [\old(e)=-126, \old(m)=16777217, e=-126, m=16777217] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=-126, \old(m)=16777217, e=-126, m=16777217] [L57] COND TRUE 1 VAL [\old(e)=-126, \old(m)=16777217, e=-126, m=16777217] [L59] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=-126, \old(m)=16777217, e=-126, m=16777217] [L76] m = m & ~ (1U << 24U) [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=-126, \old(m)=16777217, __retres4=1, e=-126, m=1, res=1] [L80] return (__retres4); [L253] RET, EXPR base2flt(mb, eb) VAL [a=1, base2flt(mb, eb)=4294967297, ea=-125, eb=-126, ma=16777216, mb=16777217, zero=0] [L253] b = base2flt(mb, eb) [L255] COND FALSE !(a < zero) [L258] COND TRUE a > zero [L259] tmp = 1 [L263] sa = tmp [L265] COND FALSE !(b < zero) [L268] COND TRUE b > zero [L269] tmp___0 = 1 [L273] sb = tmp___0 [L276] CALL addflt(a, b) [L84] unsigned int res ; [L85] unsigned int ma ; [L86] unsigned int mb ; [L87] unsigned int delta ; [L88] int ea ; [L89] int eb ; [L90] unsigned int tmp ; [L91] unsigned int __retres10 ; [L94] COND FALSE !(a < b) VAL [\old(a)=1, \old(b)=1, a=1, b=1, tmp=1] [L101] COND FALSE !(! b) [L108] ma = a & ((1U << 24U) - 1U) [L109] ea = (int )(a >> 24U) - 128 [L110] ma = ma | (1U << 24U) [L111] mb = b & ((1U << 24U) - 1U) [L112] eb = (int )(b >> 24U) - 128 [L113] mb = mb | (1U << 24U) VAL [\old(a)=1, \old(b)=1, a=1, b=1, ea=-128, eb=128, tmp=1] [L114] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=0] [L16] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L17] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 29.2s, OverallIterations: 8, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 7.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 587 SdHoareTripleChecker+Valid, 2.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 532 mSDsluCounter, 3157 SdHoareTripleChecker+Invalid, 2.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2933 mSDsCounter, 107 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1797 IncrementalHoareTripleChecker+Invalid, 1904 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 107 mSolverCounterUnsat, 429 mSDtfsCounter, 1797 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 408 GetRequests, 236 SyntacticMatches, 3 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 16.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=3, InterpolantAutomatonStates: 93, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 7 MinimizatonAttempts, 182 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 6.0s InterpolantComputationTime, 351 NumberOfCodeBlocks, 351 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 393 ConstructedInterpolants, 0 QuantifiedInterpolants, 1385 SizeOfPredicates, 41 NumberOfNonLiveVariables, 481 ConjunctsInSsa, 85 ConjunctsInUnsatCore, 14 InterpolantComputations, 4 PerfectInterpolantSequences, 124/168 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: OVERALL_TIME: 1.1s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 4, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 42, DAG_INTERPRETER_EARLY_EXITS: 2, TOOLS_POST_APPLICATIONS: 38, TOOLS_POST_TIME: 0.4s, TOOLS_POST_CALL_APPLICATIONS: 18, TOOLS_POST_CALL_TIME: 0.2s, TOOLS_POST_RETURN_APPLICATIONS: 12, TOOLS_POST_RETURN_TIME: 0.2s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 68, TOOLS_QUANTIFIERELIM_TIME: 0.8s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 98, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 19, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 42, DOMAIN_ISBOTTOM_TIME: 0.1s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 12, CALL_SUMMARIZER_CACHE_MISSES: 2, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 450, DAG_COMPRESSION_RETAINED_NODES: 105, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 02:30:27,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/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/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI --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 2e6e06de31959e386aafc2fb45c848364ae9fea32df4ba40928c607f134f313f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:30:30,381 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:30:30,383 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:30:30,421 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:30:30,423 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:30:30,427 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:30:30,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:30:30,436 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:30:30,442 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:30:30,445 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:30:30,446 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:30:30,449 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:30:30,450 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:30:30,457 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:30:30,458 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:30:30,460 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:30:30,462 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:30:30,463 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:30:30,468 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:30:30,470 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:30:30,476 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:30:30,478 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:30:30,479 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:30:30,480 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:30:30,485 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:30:30,490 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:30:30,490 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:30:30,491 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:30:30,491 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:30:30,493 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:30:30,495 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:30:30,496 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:30:30,497 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:30:30,499 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:30:30,500 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:30:30,500 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:30:30,501 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:30:30,501 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:30:30,502 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:30:30,502 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:30:30,504 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:30:30,505 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-03 02:30:30,534 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:30:30,534 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:30:30,534 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:30:30,535 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:30:30,535 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:30:30,535 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:30:30,536 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:30:30,536 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:30:30,536 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:30:30,536 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:30:30,537 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:30:30,537 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:30:30,538 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:30:30,538 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:30:30,538 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:30:30,538 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:30:30,538 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:30:30,539 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:30:30,539 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:30:30,539 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:30:30,539 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:30:30,540 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:30:30,540 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:30:30,540 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:30:30,540 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:30:30,540 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:30:30,541 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:30:30,541 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:30:30,541 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:30:30,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:30:30,542 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:30:30,542 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:30:30,542 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:30:30,542 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:30:30,542 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:30:30,543 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:30:30,543 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:30:30,543 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:30:30,543 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_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e6e06de31959e386aafc2fb45c848364ae9fea32df4ba40928c607f134f313f [2022-11-03 02:30:31,015 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:30:31,047 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:30:31,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:30:31,054 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:30:31,055 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:30:31,057 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c [2022-11-03 02:30:31,153 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/data/2e52e48b9/1740923d06bc42d094296d4e4070feab/FLAGca9ae1755 [2022-11-03 02:30:31,876 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:30:31,877 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c [2022-11-03 02:30:31,892 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/data/2e52e48b9/1740923d06bc42d094296d4e4070feab/FLAGca9ae1755 [2022-11-03 02:30:32,166 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/data/2e52e48b9/1740923d06bc42d094296d4e4070feab [2022-11-03 02:30:32,173 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:30:32,175 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:30:32,177 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:30:32,178 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:30:32,184 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:30:32,190 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:30:32" (1/1) ... [2022-11-03 02:30:32,192 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f1daa07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:32, skipping insertion in model container [2022-11-03 02:30:32,195 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:30:32" (1/1) ... [2022-11-03 02:30:32,205 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:30:32,261 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:30:32,494 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_8503c08c-7a64-4d18-ac75-96d242ec329e/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c[730,743] [2022-11-03 02:30:32,654 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:30:32,677 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:30:32,695 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_8503c08c-7a64-4d18-ac75-96d242ec329e/sv-benchmarks/c/bitvector/soft_float_1-3a.c.cil.c[730,743] [2022-11-03 02:30:32,759 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:30:32,775 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:30:32,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:32 WrapperNode [2022-11-03 02:30:32,776 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:30:32,777 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:30:32,777 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:30:32,778 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:30:32,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:32" (1/1) ... [2022-11-03 02:30:32,800 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:32" (1/1) ... [2022-11-03 02:30:32,827 INFO L138 Inliner]: procedures = 17, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 145 [2022-11-03 02:30:32,827 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:30:32,828 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:30:32,828 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:30:32,829 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:30:32,840 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:32" (1/1) ... [2022-11-03 02:30:32,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:32" (1/1) ... [2022-11-03 02:30:32,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:32" (1/1) ... [2022-11-03 02:30:32,845 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:32" (1/1) ... [2022-11-03 02:30:32,852 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:32" (1/1) ... [2022-11-03 02:30:32,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:32" (1/1) ... [2022-11-03 02:30:32,860 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:32" (1/1) ... [2022-11-03 02:30:32,862 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:32" (1/1) ... [2022-11-03 02:30:32,865 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:30:32,866 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:30:32,866 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:30:32,866 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:30:32,867 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:32" (1/1) ... [2022-11-03 02:30:32,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:30:32,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:32,901 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:30:32,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:30:32,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:30:32,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 02:30:32,974 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-11-03 02:30:32,974 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-11-03 02:30:32,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:30:32,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:30:32,975 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 02:30:32,975 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 02:30:33,069 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:30:33,072 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:30:33,613 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:30:33,626 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:30:33,627 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 02:30:33,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:30:33 BoogieIcfgContainer [2022-11-03 02:30:33,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:30:33,632 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:30:33,633 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:30:33,636 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:30:33,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:30:32" (1/3) ... [2022-11-03 02:30:33,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@136060b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:30:33, skipping insertion in model container [2022-11-03 02:30:33,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:32" (2/3) ... [2022-11-03 02:30:33,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@136060b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:30:33, skipping insertion in model container [2022-11-03 02:30:33,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:30:33" (3/3) ... [2022-11-03 02:30:33,650 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_1-3a.c.cil.c [2022-11-03 02:30:33,677 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:30:33,677 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:30:33,791 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:30:33,800 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@73cc1203, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:30:33,800 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:30:33,806 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 59 states have (on average 1.5932203389830508) internal successors, (94), 62 states have internal predecessors, (94), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-03 02:30:33,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-03 02:30:33,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:33,819 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:33,819 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:33,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:33,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1607439287, now seen corresponding path program 1 times [2022-11-03 02:30:33,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:33,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [827429363] [2022-11-03 02:30:33,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:33,844 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:33,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:33,849 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:33,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:30:33,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:33,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:30:33,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:34,155 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:30:34,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:34,243 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:30:34,244 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:34,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [827429363] [2022-11-03 02:30:34,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [827429363] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:34,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1762189878] [2022-11-03 02:30:34,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:34,246 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:30:34,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:30:34,250 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:30:34,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process [2022-11-03 02:30:34,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:34,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:30:34,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:34,541 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:30:34,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:34,652 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:30:34,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1762189878] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:34,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945677356] [2022-11-03 02:30:34,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:34,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:34,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:34,664 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:34,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:30:34,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:34,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:30:34,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:34,838 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:30:34,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:34,972 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:30:34,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945677356] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:34,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:30:34,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8, 8, 8, 8] total 10 [2022-11-03 02:30:34,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493043019] [2022-11-03 02:30:34,982 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:30:34,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:30:34,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:35,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:30:35,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:30:35,044 INFO L87 Difference]: Start difference. First operand has 72 states, 59 states have (on average 1.5932203389830508) internal successors, (94), 62 states have internal predecessors, (94), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-03 02:30:35,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:35,825 INFO L93 Difference]: Finished difference Result 380 states and 643 transitions. [2022-11-03 02:30:35,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:30:35,828 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 32 [2022-11-03 02:30:35,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:35,839 INFO L225 Difference]: With dead ends: 380 [2022-11-03 02:30:35,839 INFO L226 Difference]: Without dead ends: 279 [2022-11-03 02:30:35,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:30:35,846 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 309 mSDsluCounter, 1487 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 1710 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:35,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 1710 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:30:35,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-11-03 02:30:35,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 112. [2022-11-03 02:30:35,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 93 states have (on average 1.4301075268817205) internal successors, (133), 94 states have internal predecessors, (133), 15 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (21), 17 states have call predecessors, (21), 14 states have call successors, (21) [2022-11-03 02:30:35,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 169 transitions. [2022-11-03 02:30:35,903 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 169 transitions. Word has length 32 [2022-11-03 02:30:35,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:35,904 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 169 transitions. [2022-11-03 02:30:35,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-03 02:30:35,905 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 169 transitions. [2022-11-03 02:30:35,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 02:30:35,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:35,908 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:35,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-03 02:30:36,134 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-03 02:30:36,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:36,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:30:36,523 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:36,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:36,524 INFO L85 PathProgramCache]: Analyzing trace with hash 125469278, now seen corresponding path program 1 times [2022-11-03 02:30:36,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:36,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1113603729] [2022-11-03 02:30:36,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:36,526 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:36,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:36,537 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:36,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:30:36,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:36,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:30:36,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:36,710 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:30:36,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:36,711 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:36,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1113603729] [2022-11-03 02:30:36,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1113603729] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:36,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:36,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:30:36,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113247239] [2022-11-03 02:30:36,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:36,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:30:36,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:36,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:30:36,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:30:36,717 INFO L87 Difference]: Start difference. First operand 112 states and 169 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:30:36,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:36,885 INFO L93 Difference]: Finished difference Result 248 states and 376 transitions. [2022-11-03 02:30:36,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:30:36,887 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-11-03 02:30:36,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:36,894 INFO L225 Difference]: With dead ends: 248 [2022-11-03 02:30:36,895 INFO L226 Difference]: Without dead ends: 187 [2022-11-03 02:30:36,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:30:36,902 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 52 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:36,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 457 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:30:36,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-11-03 02:30:36,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2022-11-03 02:30:36,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 157 states have (on average 1.4203821656050954) internal successors, (223), 156 states have internal predecessors, (223), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (28), 28 states have call predecessors, (28), 21 states have call successors, (28) [2022-11-03 02:30:36,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 273 transitions. [2022-11-03 02:30:36,936 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 273 transitions. Word has length 40 [2022-11-03 02:30:36,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:36,937 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 273 transitions. [2022-11-03 02:30:36,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:30:36,938 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 273 transitions. [2022-11-03 02:30:36,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 02:30:36,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:36,959 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:36,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-11-03 02:30:37,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:30:37,181 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:37,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:37,182 INFO L85 PathProgramCache]: Analyzing trace with hash 805527648, now seen corresponding path program 1 times [2022-11-03 02:30:37,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:37,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [510298186] [2022-11-03 02:30:37,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:37,183 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:37,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:37,190 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:37,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:30:37,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:37,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:30:37,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:37,361 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:30:37,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:37,362 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:37,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [510298186] [2022-11-03 02:30:37,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [510298186] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:37,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:37,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:30:37,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211247622] [2022-11-03 02:30:37,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:37,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:30:37,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:37,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:30:37,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:30:37,366 INFO L87 Difference]: Start difference. First operand 183 states and 273 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:30:37,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:37,556 INFO L93 Difference]: Finished difference Result 256 states and 383 transitions. [2022-11-03 02:30:37,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:30:37,558 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-11-03 02:30:37,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:37,560 INFO L225 Difference]: With dead ends: 256 [2022-11-03 02:30:37,561 INFO L226 Difference]: Without dead ends: 201 [2022-11-03 02:30:37,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:30:37,563 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 105 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:37,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 539 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:30:37,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-11-03 02:30:37,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 174. [2022-11-03 02:30:37,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 151 states have (on average 1.3973509933774835) internal successors, (211), 150 states have internal predecessors, (211), 19 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (25), 25 states have call predecessors, (25), 18 states have call successors, (25) [2022-11-03 02:30:37,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 255 transitions. [2022-11-03 02:30:37,592 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 255 transitions. Word has length 40 [2022-11-03 02:30:37,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:37,593 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 255 transitions. [2022-11-03 02:30:37,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:30:37,594 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 255 transitions. [2022-11-03 02:30:37,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-03 02:30:37,597 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:37,597 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:37,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:37,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:30:37,821 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:37,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:37,822 INFO L85 PathProgramCache]: Analyzing trace with hash 339137576, now seen corresponding path program 1 times [2022-11-03 02:30:37,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:37,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1879594386] [2022-11-03 02:30:37,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:37,823 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:37,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:37,825 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:37,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:30:37,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:37,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:30:37,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:37,991 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:30:37,991 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:37,991 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:37,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1879594386] [2022-11-03 02:30:37,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1879594386] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:37,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:37,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:30:37,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501468505] [2022-11-03 02:30:37,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:37,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:30:37,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:37,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:30:37,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:30:37,995 INFO L87 Difference]: Start difference. First operand 174 states and 255 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:30:38,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:38,071 INFO L93 Difference]: Finished difference Result 321 states and 477 transitions. [2022-11-03 02:30:38,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:30:38,072 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2022-11-03 02:30:38,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:38,075 INFO L225 Difference]: With dead ends: 321 [2022-11-03 02:30:38,082 INFO L226 Difference]: Without dead ends: 255 [2022-11-03 02:30:38,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:30:38,088 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 66 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:38,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 329 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:30:38,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-11-03 02:30:38,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 223. [2022-11-03 02:30:38,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 197 states have (on average 1.3553299492385786) internal successors, (267), 196 states have internal predecessors, (267), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (28), 28 states have call predecessors, (28), 21 states have call successors, (28) [2022-11-03 02:30:38,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 317 transitions. [2022-11-03 02:30:38,141 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 317 transitions. Word has length 43 [2022-11-03 02:30:38,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:38,141 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 317 transitions. [2022-11-03 02:30:38,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:30:38,142 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 317 transitions. [2022-11-03 02:30:38,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-03 02:30:38,144 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:38,144 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:38,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:38,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:30:38,366 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:38,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:38,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1682069059, now seen corresponding path program 1 times [2022-11-03 02:30:38,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:38,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1491476304] [2022-11-03 02:30:38,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:38,368 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:38,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:38,369 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:38,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:30:38,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:38,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:30:38,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:38,482 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:30:38,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:38,485 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:38,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1491476304] [2022-11-03 02:30:38,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1491476304] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:38,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:38,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:30:38,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935264235] [2022-11-03 02:30:38,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:38,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:30:38,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:38,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:30:38,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:30:38,488 INFO L87 Difference]: Start difference. First operand 223 states and 317 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 02:30:38,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:38,601 INFO L93 Difference]: Finished difference Result 367 states and 521 transitions. [2022-11-03 02:30:38,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:30:38,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-11-03 02:30:38,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:38,606 INFO L225 Difference]: With dead ends: 367 [2022-11-03 02:30:38,607 INFO L226 Difference]: Without dead ends: 147 [2022-11-03 02:30:38,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:30:38,609 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 25 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:38,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 250 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:30:38,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-03 02:30:38,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 135. [2022-11-03 02:30:38,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 118 states have (on average 1.3305084745762712) internal successors, (157), 120 states have internal predecessors, (157), 12 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (17), 14 states have call predecessors, (17), 11 states have call successors, (17) [2022-11-03 02:30:38,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 186 transitions. [2022-11-03 02:30:38,637 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 186 transitions. Word has length 43 [2022-11-03 02:30:38,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:38,637 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 186 transitions. [2022-11-03 02:30:38,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 02:30:38,638 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 186 transitions. [2022-11-03 02:30:38,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:30:38,643 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:38,643 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:38,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:38,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:30:38,858 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:38,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:38,858 INFO L85 PathProgramCache]: Analyzing trace with hash -690232792, now seen corresponding path program 1 times [2022-11-03 02:30:38,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:38,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [523092012] [2022-11-03 02:30:38,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:38,859 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:38,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:38,861 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:38,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:30:38,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:38,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:30:38,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:39,137 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:30:39,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:39,287 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:30:39,287 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:39,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [523092012] [2022-11-03 02:30:39,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [523092012] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:30:39,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:30:39,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-11-03 02:30:39,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078466165] [2022-11-03 02:30:39,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:39,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:30:39,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:39,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:30:39,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:30:39,289 INFO L87 Difference]: Start difference. First operand 135 states and 186 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:30:39,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:39,842 INFO L93 Difference]: Finished difference Result 267 states and 394 transitions. [2022-11-03 02:30:39,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:30:39,843 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-11-03 02:30:39,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:39,845 INFO L225 Difference]: With dead ends: 267 [2022-11-03 02:30:39,845 INFO L226 Difference]: Without dead ends: 231 [2022-11-03 02:30:39,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:30:39,847 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 187 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:39,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 502 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:30:39,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-03 02:30:39,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 163. [2022-11-03 02:30:39,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 142 states have (on average 1.323943661971831) internal successors, (188), 145 states have internal predecessors, (188), 16 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (21), 18 states have call predecessors, (21), 15 states have call successors, (21) [2022-11-03 02:30:39,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 225 transitions. [2022-11-03 02:30:39,865 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 225 transitions. Word has length 44 [2022-11-03 02:30:39,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:39,867 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 225 transitions. [2022-11-03 02:30:39,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:30:39,867 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 225 transitions. [2022-11-03 02:30:39,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:30:39,870 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:39,870 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:39,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:40,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:30:40,086 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:40,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:40,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1084774570, now seen corresponding path program 1 times [2022-11-03 02:30:40,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:40,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [484538391] [2022-11-03 02:30:40,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:40,088 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:40,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:40,089 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:40,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:30:40,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:40,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:30:40,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:40,175 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:30:40,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:40,175 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:40,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [484538391] [2022-11-03 02:30:40,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [484538391] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:40,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:40,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:30:40,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064230724] [2022-11-03 02:30:40,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:40,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:30:40,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:40,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:30:40,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:30:40,178 INFO L87 Difference]: Start difference. First operand 163 states and 225 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:30:40,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:40,215 INFO L93 Difference]: Finished difference Result 170 states and 231 transitions. [2022-11-03 02:30:40,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:30:40,216 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-11-03 02:30:40,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:40,217 INFO L225 Difference]: With dead ends: 170 [2022-11-03 02:30:40,218 INFO L226 Difference]: Without dead ends: 163 [2022-11-03 02:30:40,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:30:40,219 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 5 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:40,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 380 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:30:40,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-03 02:30:40,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-11-03 02:30:40,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 142 states have (on average 1.3028169014084507) internal successors, (185), 145 states have internal predecessors, (185), 16 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (21), 18 states have call predecessors, (21), 15 states have call successors, (21) [2022-11-03 02:30:40,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 222 transitions. [2022-11-03 02:30:40,232 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 222 transitions. Word has length 44 [2022-11-03 02:30:40,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:40,233 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 222 transitions. [2022-11-03 02:30:40,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:30:40,233 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 222 transitions. [2022-11-03 02:30:40,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:30:40,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:40,234 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:40,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:40,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:30:40,448 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:40,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:40,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1335974199, now seen corresponding path program 2 times [2022-11-03 02:30:40,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:40,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1260309680] [2022-11-03 02:30:40,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:30:40,450 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:40,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:40,451 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:40,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 02:30:40,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-03 02:30:40,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:30:40,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:30:40,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:40,657 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:30:40,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:40,657 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:40,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1260309680] [2022-11-03 02:30:40,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1260309680] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:40,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:40,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:30:40,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908039248] [2022-11-03 02:30:40,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:40,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:30:40,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:40,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:30:40,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:30:40,660 INFO L87 Difference]: Start difference. First operand 163 states and 222 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:30:40,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:40,761 INFO L93 Difference]: Finished difference Result 202 states and 279 transitions. [2022-11-03 02:30:40,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:30:40,762 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-11-03 02:30:40,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:40,763 INFO L225 Difference]: With dead ends: 202 [2022-11-03 02:30:40,764 INFO L226 Difference]: Without dead ends: 200 [2022-11-03 02:30:40,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:30:40,765 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 38 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:40,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 599 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2022-11-03 02:30:40,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-11-03 02:30:40,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 167. [2022-11-03 02:30:40,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 145 states have (on average 1.296551724137931) internal successors, (188), 148 states have internal predecessors, (188), 16 states have call successors, (16), 3 states have call predecessors, (16), 5 states have return successors, (21), 18 states have call predecessors, (21), 15 states have call successors, (21) [2022-11-03 02:30:40,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 225 transitions. [2022-11-03 02:30:40,787 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 225 transitions. Word has length 44 [2022-11-03 02:30:40,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:40,788 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 225 transitions. [2022-11-03 02:30:40,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:30:40,789 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 225 transitions. [2022-11-03 02:30:40,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:30:40,791 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:40,791 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:40,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:41,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:30:41,001 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:41,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:41,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1278715897, now seen corresponding path program 1 times [2022-11-03 02:30:41,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:41,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2086152242] [2022-11-03 02:30:41,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:41,002 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:41,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:41,003 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:41,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 02:30:41,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:41,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:30:41,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:41,180 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:30:41,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:41,181 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:41,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2086152242] [2022-11-03 02:30:41,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2086152242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:41,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:41,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:30:41,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317943723] [2022-11-03 02:30:41,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:41,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:30:41,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:41,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:30:41,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:30:41,183 INFO L87 Difference]: Start difference. First operand 167 states and 225 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:30:41,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:41,273 INFO L93 Difference]: Finished difference Result 212 states and 291 transitions. [2022-11-03 02:30:41,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:30:41,274 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-11-03 02:30:41,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:41,276 INFO L225 Difference]: With dead ends: 212 [2022-11-03 02:30:41,276 INFO L226 Difference]: Without dead ends: 210 [2022-11-03 02:30:41,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:30:41,277 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 38 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:41,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 464 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2022-11-03 02:30:41,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-11-03 02:30:41,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 171. [2022-11-03 02:30:41,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 148 states have (on average 1.2905405405405406) internal successors, (191), 151 states have internal predecessors, (191), 16 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (21), 18 states have call predecessors, (21), 15 states have call successors, (21) [2022-11-03 02:30:41,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 228 transitions. [2022-11-03 02:30:41,293 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 228 transitions. Word has length 44 [2022-11-03 02:30:41,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:41,294 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 228 transitions. [2022-11-03 02:30:41,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:30:41,294 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 228 transitions. [2022-11-03 02:30:41,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 02:30:41,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:41,295 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:41,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:41,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:30:41,507 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:41,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:41,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1134786859, now seen corresponding path program 1 times [2022-11-03 02:30:41,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:41,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2015320984] [2022-11-03 02:30:41,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:41,508 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:41,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:41,509 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:41,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 02:30:41,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:41,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:30:41,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:41,593 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:30:41,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:41,594 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:41,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2015320984] [2022-11-03 02:30:41,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2015320984] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:41,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:41,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:30:41,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256871196] [2022-11-03 02:30:41,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:41,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:30:41,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:41,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:30:41,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:30:41,596 INFO L87 Difference]: Start difference. First operand 171 states and 228 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:30:41,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:41,640 INFO L93 Difference]: Finished difference Result 283 states and 388 transitions. [2022-11-03 02:30:41,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:30:41,640 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-11-03 02:30:41,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:41,642 INFO L225 Difference]: With dead ends: 283 [2022-11-03 02:30:41,642 INFO L226 Difference]: Without dead ends: 231 [2022-11-03 02:30:41,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:30:41,643 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 75 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:41,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 305 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:30:41,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-03 02:30:41,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 190. [2022-11-03 02:30:41,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 164 states have (on average 1.298780487804878) internal successors, (213), 166 states have internal predecessors, (213), 19 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (24), 21 states have call predecessors, (24), 18 states have call successors, (24) [2022-11-03 02:30:41,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 256 transitions. [2022-11-03 02:30:41,664 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 256 transitions. Word has length 45 [2022-11-03 02:30:41,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:41,664 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 256 transitions. [2022-11-03 02:30:41,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:30:41,664 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 256 transitions. [2022-11-03 02:30:41,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 02:30:41,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:41,666 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:41,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:41,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:30:41,887 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:41,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:41,887 INFO L85 PathProgramCache]: Analyzing trace with hash 702695573, now seen corresponding path program 1 times [2022-11-03 02:30:41,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:41,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [241431078] [2022-11-03 02:30:41,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:41,888 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:41,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:41,889 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:41,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 02:30:41,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:41,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:30:41,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:41,959 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:30:41,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:41,960 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:41,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [241431078] [2022-11-03 02:30:41,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [241431078] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:41,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:41,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:30:41,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260348375] [2022-11-03 02:30:41,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:41,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:30:41,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:41,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:30:41,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:30:41,962 INFO L87 Difference]: Start difference. First operand 190 states and 256 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:30:41,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:41,990 INFO L93 Difference]: Finished difference Result 205 states and 272 transitions. [2022-11-03 02:30:41,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:30:41,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2022-11-03 02:30:41,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:41,992 INFO L225 Difference]: With dead ends: 205 [2022-11-03 02:30:41,992 INFO L226 Difference]: Without dead ends: 166 [2022-11-03 02:30:41,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:30:41,993 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 1 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:41,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 285 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:30:41,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-11-03 02:30:42,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2022-11-03 02:30:42,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 140 states have (on average 1.3142857142857143) internal successors, (184), 143 states have internal predecessors, (184), 19 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (22), 20 states have call predecessors, (22), 18 states have call successors, (22) [2022-11-03 02:30:42,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 225 transitions. [2022-11-03 02:30:42,012 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 225 transitions. Word has length 48 [2022-11-03 02:30:42,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:42,013 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 225 transitions. [2022-11-03 02:30:42,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:30:42,013 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 225 transitions. [2022-11-03 02:30:42,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-03 02:30:42,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:42,014 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:42,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:42,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:30:42,226 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:42,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:42,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1060673824, now seen corresponding path program 1 times [2022-11-03 02:30:42,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:42,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1970744891] [2022-11-03 02:30:42,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:42,227 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:42,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:42,228 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:42,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 02:30:42,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:42,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:30:42,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:42,332 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:30:42,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:42,333 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:42,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1970744891] [2022-11-03 02:30:42,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1970744891] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:42,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:42,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:30:42,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750413733] [2022-11-03 02:30:42,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:42,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:30:42,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:42,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:30:42,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:30:42,335 INFO L87 Difference]: Start difference. First operand 166 states and 225 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:30:42,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:42,456 INFO L93 Difference]: Finished difference Result 241 states and 330 transitions. [2022-11-03 02:30:42,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:30:42,457 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2022-11-03 02:30:42,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:42,458 INFO L225 Difference]: With dead ends: 241 [2022-11-03 02:30:42,459 INFO L226 Difference]: Without dead ends: 199 [2022-11-03 02:30:42,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:30:42,460 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 128 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:42,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 345 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:30:42,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-11-03 02:30:42,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 166. [2022-11-03 02:30:42,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 140 states have (on average 1.3) internal successors, (182), 143 states have internal predecessors, (182), 19 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (22), 20 states have call predecessors, (22), 18 states have call successors, (22) [2022-11-03 02:30:42,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 223 transitions. [2022-11-03 02:30:42,481 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 223 transitions. Word has length 49 [2022-11-03 02:30:42,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:42,481 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 223 transitions. [2022-11-03 02:30:42,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:30:42,482 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 223 transitions. [2022-11-03 02:30:42,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 02:30:42,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:42,483 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:42,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:42,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:30:42,697 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:42,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:42,697 INFO L85 PathProgramCache]: Analyzing trace with hash 45509775, now seen corresponding path program 1 times [2022-11-03 02:30:42,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:42,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1960804901] [2022-11-03 02:30:42,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:42,698 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:42,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:42,699 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:42,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 02:30:42,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:30:42,779 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:30:42,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:30:42,902 INFO L130 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2022-11-03 02:30:42,903 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:30:42,904 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:30:42,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:43,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:30:43,110 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:43,113 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:30:43,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:30:43 BoogieIcfgContainer [2022-11-03 02:30:43,176 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:30:43,177 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:30:43,177 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:30:43,178 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:30:43,178 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:30:33" (3/4) ... [2022-11-03 02:30:43,180 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-03 02:30:43,272 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/witness.graphml [2022-11-03 02:30:43,272 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:30:43,273 INFO L158 Benchmark]: Toolchain (without parser) took 11098.14ms. Allocated memory was 56.6MB in the beginning and 119.5MB in the end (delta: 62.9MB). Free memory was 33.3MB in the beginning and 51.2MB in the end (delta: -17.9MB). Peak memory consumption was 45.0MB. Max. memory is 16.1GB. [2022-11-03 02:30:43,274 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 56.6MB. Free memory was 36.9MB in the beginning and 36.9MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:30:43,274 INFO L158 Benchmark]: CACSL2BoogieTranslator took 599.00ms. Allocated memory is still 56.6MB. Free memory was 33.0MB in the beginning and 35.4MB in the end (delta: -2.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-03 02:30:43,275 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.24ms. Allocated memory is still 56.6MB. Free memory was 35.4MB in the beginning and 33.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:30:43,275 INFO L158 Benchmark]: Boogie Preprocessor took 37.22ms. Allocated memory is still 56.6MB. Free memory was 33.5MB in the beginning and 31.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:30:43,276 INFO L158 Benchmark]: RCFGBuilder took 763.65ms. Allocated memory was 56.6MB in the beginning and 88.1MB in the end (delta: 31.5MB). Free memory was 31.7MB in the beginning and 60.6MB in the end (delta: -29.0MB). Peak memory consumption was 12.5MB. Max. memory is 16.1GB. [2022-11-03 02:30:43,276 INFO L158 Benchmark]: TraceAbstraction took 9543.95ms. Allocated memory was 88.1MB in the beginning and 119.5MB in the end (delta: 31.5MB). Free memory was 60.0MB in the beginning and 55.4MB in the end (delta: 4.6MB). Peak memory consumption was 35.6MB. Max. memory is 16.1GB. [2022-11-03 02:30:43,277 INFO L158 Benchmark]: Witness Printer took 95.52ms. Allocated memory is still 119.5MB. Free memory was 55.4MB in the beginning and 51.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 02:30:43,279 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 56.6MB. Free memory was 36.9MB in the beginning and 36.9MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 599.00ms. Allocated memory is still 56.6MB. Free memory was 33.0MB in the beginning and 35.4MB in the end (delta: -2.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 50.24ms. Allocated memory is still 56.6MB. Free memory was 35.4MB in the beginning and 33.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.22ms. Allocated memory is still 56.6MB. Free memory was 33.5MB in the beginning and 31.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 763.65ms. Allocated memory was 56.6MB in the beginning and 88.1MB in the end (delta: 31.5MB). Free memory was 31.7MB in the beginning and 60.6MB in the end (delta: -29.0MB). Peak memory consumption was 12.5MB. Max. memory is 16.1GB. * TraceAbstraction took 9543.95ms. Allocated memory was 88.1MB in the beginning and 119.5MB in the end (delta: 31.5MB). Free memory was 60.0MB in the beginning and 55.4MB in the end (delta: 4.6MB). Peak memory consumption was 35.6MB. Max. memory is 16.1GB. * Witness Printer took 95.52ms. Allocated memory is still 119.5MB. Free memory was 55.4MB in the beginning and 51.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. 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 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L226] unsigned int a ; [L227] unsigned int ma = __VERIFIER_nondet_uint(); [L228] signed char ea = __VERIFIER_nondet_char(); [L229] unsigned int b ; [L230] unsigned int mb = __VERIFIER_nondet_uint(); [L231] signed char eb = __VERIFIER_nondet_char(); [L232] unsigned int r_add ; [L233] unsigned int zero ; [L234] int sa ; [L235] int sb ; [L236] int tmp ; [L237] int tmp___0 ; [L238] int tmp___1 ; [L239] int tmp___2 ; [L240] int tmp___3 ; [L241] int tmp___4 ; [L242] int tmp___5 ; [L243] int tmp___6 ; [L244] int tmp___7 ; [L245] int tmp___8 ; [L246] int tmp___9 ; [L247] int __retres23 ; [L251] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L29] COND TRUE ! m [L30] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L80] return (__retres4); VAL [\old(e)=0, \old(m)=0, \result=0, __retres4=0, e=0, m=0] [L251] RET, EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0] [L251] zero = base2flt(0, 0) [L252] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=0, \old(m)=16777216] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L29] COND FALSE !(! m) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L57] COND TRUE 1 VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L59] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L76] m = m & ~ (1U << 24U) [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=0, \old(m)=16777216, __retres4=2147483648, e=0, m=0, res=2147483648] [L80] return (__retres4); VAL [\old(e)=0, \old(m)=16777216, \result=-2147483648, __retres4=2147483648, e=0, m=0, res=2147483648] [L252] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=-2147483648, ea=0, ma=16777216, zero=0] [L252] a = base2flt(ma, ea) [L253] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=64, \old(m)=16777216] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L29] COND FALSE !(! m) VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L57] COND TRUE 1 VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L59] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L76] m = m & ~ (1U << 24U) [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=64, \old(m)=16777216, __retres4=3221225472, e=64, m=0, res=3221225472] [L80] return (__retres4); VAL [\old(e)=64, \old(m)=16777216, \result=-1073741824, __retres4=3221225472, e=64, m=0, res=3221225472] [L253] RET, EXPR base2flt(mb, eb) VAL [a=2147483648, base2flt(mb, eb)=-1073741824, ea=0, eb=64, ma=16777216, mb=16777216, zero=0] [L253] b = base2flt(mb, eb) [L255] COND FALSE !(a < zero) VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, zero=0] [L258] COND TRUE a > zero [L259] tmp = 1 VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, tmp=1, zero=0] [L263] sa = tmp VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, sa=1, tmp=1, zero=0] [L265] COND FALSE !(b < zero) VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, sa=1, tmp=1, zero=0] [L268] COND TRUE b > zero [L269] tmp___0 = 1 VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, sa=1, tmp=1, tmp___0=1, zero=0] [L273] sb = tmp___0 VAL [a=2147483648, b=3221225472, ea=0, eb=64, ma=16777216, mb=16777216, sa=1, sb=1, tmp=1, tmp___0=1, zero=0] [L276] CALL addflt(a, b) [L84] unsigned int res ; [L85] unsigned int ma ; [L86] unsigned int mb ; [L87] unsigned int delta ; [L88] int ea ; [L89] int eb ; [L90] unsigned int tmp ; [L91] unsigned int __retres10 ; VAL [\old(a)=2147483648, \old(b)=3221225472, a=2147483648, b=3221225472] [L94] COND TRUE a < b [L95] tmp = a [L96] a = b [L97] b = tmp VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, tmp=2147483648] [L101] COND FALSE !(! b) [L108] ma = a & ((1U << 24U) - 1U) [L109] ea = (int )(a >> 24U) - 128 [L110] ma = ma | (1U << 24U) [L111] mb = b & ((1U << 24U) - 1U) [L112] eb = (int )(b >> 24U) - 128 [L113] mb = mb | (1U << 24U) VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, ea=64, eb=0, ma=16777216, mb=16777216, tmp=2147483648] [L114] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=1] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L114] RET __VERIFIER_assert(ea >= eb) VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, ea=64, eb=0, ma=16777216, mb=16777216, tmp=2147483648] [L115] delta = ea - eb VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, delta=64, ea=64, eb=0, ma=16777216, mb=16777216, tmp=2147483648] [L116] CALL __VERIFIER_assert(delta < sizeof(mb) * 8) VAL [\old(cond)=0] [L16] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L17] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 9.3s, OverallIterations: 13, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1056 SdHoareTripleChecker+Valid, 1.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1029 mSDsluCounter, 6165 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 26 IncrementalHoareTripleChecker+Unchecked, 4777 mSDsCounter, 123 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 896 IncrementalHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 123 mSolverCounterUnsat, 1388 mSDtfsCounter, 896 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 730 GetRequests, 651 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=223occurred in iteration=4, InterpolantAutomatonStates: 82, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 456 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 630 NumberOfCodeBlocks, 612 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 702 ConstructedInterpolants, 2 QuantifiedInterpolants, 1106 SizeOfPredicates, 43 NumberOfNonLiveVariables, 1118 ConjunctsInSsa, 82 ConjunctsInUnsatCore, 18 InterpolantComputations, 11 PerfectInterpolantSequences, 255/282 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-03 02:30:43,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8503c08c-7a64-4d18-ac75-96d242ec329e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE