./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh --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 bf0fb52bead8e180875472b49ad053a30663ea61c3025c1e008ec598b0fa4db0 --- 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-2329fc7 [2022-12-14 11:04:10,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:04:10,140 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:04:10,153 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:04:10,153 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:04:10,154 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:04:10,155 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:04:10,156 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:04:10,157 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:04:10,158 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:04:10,158 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:04:10,159 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:04:10,159 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:04:10,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:04:10,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:04:10,161 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:04:10,162 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:04:10,163 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:04:10,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:04:10,165 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:04:10,166 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:04:10,167 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:04:10,169 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:04:10,170 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:04:10,172 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:04:10,172 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:04:10,173 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:04:10,173 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:04:10,173 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:04:10,174 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:04:10,174 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:04:10,175 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:04:10,175 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:04:10,176 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:04:10,176 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:04:10,176 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:04:10,177 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:04:10,177 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:04:10,177 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:04:10,178 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:04:10,178 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:04:10,179 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 11:04:10,192 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:04:10,192 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:04:10,192 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:04:10,193 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:04:10,193 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:04:10,193 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:04:10,193 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:04:10,193 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:04:10,193 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:04:10,193 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 11:04:10,194 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:04:10,194 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:04:10,194 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 11:04:10,194 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 11:04:10,194 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:04:10,194 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 11:04:10,194 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 11:04:10,194 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 11:04:10,195 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:04:10,195 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:04:10,195 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:04:10,195 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:04:10,195 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:04:10,195 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 11:04:10,195 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:04:10,195 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 11:04:10,195 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:04:10,195 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 11:04:10,196 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:04:10,196 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 11:04:10,196 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:04:10,196 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:04:10,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:04:10,196 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:04:10,196 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 11:04:10,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:04:10,196 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 11:04:10,196 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 11:04:10,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 11:04:10,197 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 11:04:10,197 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:04:10,197 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_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf0fb52bead8e180875472b49ad053a30663ea61c3025c1e008ec598b0fa4db0 [2022-12-14 11:04:10,368 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:04:10,389 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:04:10,391 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:04:10,393 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:04:10,393 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:04:10,394 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c [2022-12-14 11:04:12,904 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:04:13,059 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:04:13,060 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c [2022-12-14 11:04:13,065 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/data/2530ecfe7/7bb92e490d4047c8ba5f60c2b8a00a15/FLAG461cc719b [2022-12-14 11:04:13,469 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/data/2530ecfe7/7bb92e490d4047c8ba5f60c2b8a00a15 [2022-12-14 11:04:13,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:04:13,472 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:04:13,473 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:04:13,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:04:13,475 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:04:13,476 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:04:13" (1/1) ... [2022-12-14 11:04:13,476 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77b6a7e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:04:13, skipping insertion in model container [2022-12-14 11:04:13,476 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:04:13" (1/1) ... [2022-12-14 11:04:13,481 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:04:13,497 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:04:13,603 WARN L237 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_4dc124d1-f1ed-4438-8415-a95a2f894ee9/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c[1995,2008] [2022-12-14 11:04:13,609 WARN L237 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_4dc124d1-f1ed-4438-8415-a95a2f894ee9/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c[2364,2377] [2022-12-14 11:04:13,647 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:04:13,654 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:04:13,664 WARN L237 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_4dc124d1-f1ed-4438-8415-a95a2f894ee9/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c[1995,2008] [2022-12-14 11:04:13,664 WARN L237 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_4dc124d1-f1ed-4438-8415-a95a2f894ee9/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c[2364,2377] [2022-12-14 11:04:13,685 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:04:13,698 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:04:13,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:04:13 WrapperNode [2022-12-14 11:04:13,699 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:04:13,700 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:04:13,700 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:04:13,700 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:04:13,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:04:13" (1/1) ... [2022-12-14 11:04:13,717 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:04:13" (1/1) ... [2022-12-14 11:04:13,739 INFO L138 Inliner]: procedures = 27, calls = 17, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 187 [2022-12-14 11:04:13,740 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:04:13,740 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:04:13,740 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:04:13,740 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:04:13,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:04:13" (1/1) ... [2022-12-14 11:04:13,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:04:13" (1/1) ... [2022-12-14 11:04:13,751 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:04:13" (1/1) ... [2022-12-14 11:04:13,751 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:04:13" (1/1) ... [2022-12-14 11:04:13,758 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:04:13" (1/1) ... [2022-12-14 11:04:13,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:04:13" (1/1) ... [2022-12-14 11:04:13,763 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:04:13" (1/1) ... [2022-12-14 11:04:13,765 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:04:13" (1/1) ... [2022-12-14 11:04:13,768 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:04:13,768 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:04:13,769 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:04:13,769 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:04:13,769 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:04:13" (1/1) ... [2022-12-14 11:04:13,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:04:13,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:04:13,796 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:04:13,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:04:13,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:04:13,829 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-12-14 11:04:13,829 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-12-14 11:04:13,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 11:04:13,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:04:13,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:04:13,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 11:04:13,830 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 11:04:13,892 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:04:13,893 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:04:14,190 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:04:14,371 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:04:14,372 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 11:04:14,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:04:14 BoogieIcfgContainer [2022-12-14 11:04:14,374 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:04:14,376 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:04:14,377 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:04:14,380 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:04:14,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:04:13" (1/3) ... [2022-12-14 11:04:14,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b428d3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:04:14, skipping insertion in model container [2022-12-14 11:04:14,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:04:13" (2/3) ... [2022-12-14 11:04:14,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b428d3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:04:14, skipping insertion in model container [2022-12-14 11:04:14,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:04:14" (3/3) ... [2022-12-14 11:04:14,382 INFO L112 eAbstractionObserver]: Analyzing ICFG square_7+soft_float_3a.c.cil.c [2022-12-14 11:04:14,400 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:04:14,400 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 11:04:14,437 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:04:14,443 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;@59337912, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:04:14,443 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 11:04:14,447 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 38 states have internal predecessors, (55), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 11:04:14,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 11:04:14,453 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:04:14,454 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 11:04:14,454 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:04:14,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:04:14,458 INFO L85 PathProgramCache]: Analyzing trace with hash 10101421, now seen corresponding path program 1 times [2022-12-14 11:04:14,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:04:14,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573431644] [2022-12-14 11:04:14,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:04:14,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:04:14,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 11:04:14,540 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 11:04:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 11:04:14,563 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 11:04:14,564 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 11:04:14,565 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-12-14 11:04:14,566 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-14 11:04:14,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 11:04:14,570 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2022-12-14 11:04:14,573 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 11:04:14,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 11:04:14 BoogieIcfgContainer [2022-12-14 11:04:14,588 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 11:04:14,588 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 11:04:14,588 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 11:04:14,589 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 11:04:14,589 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:04:14" (3/4) ... [2022-12-14 11:04:14,592 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-12-14 11:04:14,592 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 11:04:14,593 INFO L158 Benchmark]: Toolchain (without parser) took 1121.02ms. Allocated memory was 123.7MB in the beginning and 148.9MB in the end (delta: 25.2MB). Free memory was 88.4MB in the beginning and 78.2MB in the end (delta: 10.2MB). Peak memory consumption was 37.8MB. Max. memory is 16.1GB. [2022-12-14 11:04:14,594 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 123.7MB. Free memory is still 94.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 11:04:14,594 INFO L158 Benchmark]: CACSL2BoogieTranslator took 226.43ms. Allocated memory is still 123.7MB. Free memory was 88.4MB in the beginning and 74.1MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-12-14 11:04:14,595 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.76ms. Allocated memory is still 123.7MB. Free memory was 74.1MB in the beginning and 71.7MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 11:04:14,595 INFO L158 Benchmark]: Boogie Preprocessor took 27.73ms. Allocated memory is still 123.7MB. Free memory was 71.7MB in the beginning and 69.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 11:04:14,596 INFO L158 Benchmark]: RCFGBuilder took 605.87ms. Allocated memory was 123.7MB in the beginning and 148.9MB in the end (delta: 25.2MB). Free memory was 69.9MB in the beginning and 92.9MB in the end (delta: -22.9MB). Peak memory consumption was 25.3MB. Max. memory is 16.1GB. [2022-12-14 11:04:14,596 INFO L158 Benchmark]: TraceAbstraction took 211.50ms. Allocated memory is still 148.9MB. Free memory was 92.1MB in the beginning and 78.2MB in the end (delta: 13.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-12-14 11:04:14,597 INFO L158 Benchmark]: Witness Printer took 3.95ms. Allocated memory is still 148.9MB. Free memory is still 78.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 11:04:14,600 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 123.7MB. Free memory is still 94.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 226.43ms. Allocated memory is still 123.7MB. Free memory was 88.4MB in the beginning and 74.1MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.76ms. Allocated memory is still 123.7MB. Free memory was 74.1MB in the beginning and 71.7MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 27.73ms. Allocated memory is still 123.7MB. Free memory was 71.7MB in the beginning and 69.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 605.87ms. Allocated memory was 123.7MB in the beginning and 148.9MB in the end (delta: 25.2MB). Free memory was 69.9MB in the beginning and 92.9MB in the end (delta: -22.9MB). Peak memory consumption was 25.3MB. Max. memory is 16.1GB. * TraceAbstraction took 211.50ms. Allocated memory is still 148.9MB. Free memory was 92.1MB in the beginning and 78.2MB in the end (delta: 13.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Witness Printer took 3.95ms. Allocated memory is still 148.9MB. Free memory is still 78.2MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 48]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 47, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L320] COND TRUE __VERIFIER_nondet_int() [L321] CALL main1() [L39] float IN = __VERIFIER_nondet_float(); [L40] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L34] COND FALSE !(!cond) [L40] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L42] float x = IN; [L44-L45] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; VAL [IN=53, x=53] [L47] COND TRUE !(result >= 0.0f && result < 1.4f) VAL [IN=53, x=53] [L48] reach_error() VAL [IN=53, x=53] - UnprovableResult [Line: 60]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 45 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.1s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-12-14 11:04:14,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/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_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh --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 bf0fb52bead8e180875472b49ad053a30663ea61c3025c1e008ec598b0fa4db0 --- 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-2329fc7 [2022-12-14 11:04:16,328 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:04:16,330 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:04:16,344 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:04:16,345 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:04:16,346 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:04:16,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:04:16,348 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:04:16,349 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:04:16,350 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:04:16,350 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:04:16,351 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:04:16,352 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:04:16,352 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:04:16,353 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:04:16,354 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:04:16,360 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:04:16,361 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:04:16,363 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:04:16,364 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:04:16,365 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:04:16,365 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:04:16,366 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:04:16,367 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:04:16,369 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:04:16,369 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:04:16,369 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:04:16,370 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:04:16,370 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:04:16,371 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:04:16,371 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:04:16,371 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:04:16,372 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:04:16,372 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:04:16,373 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:04:16,373 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:04:16,374 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:04:16,374 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:04:16,374 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:04:16,375 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:04:16,375 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:04:16,376 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-12-14 11:04:16,391 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:04:16,392 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:04:16,392 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:04:16,392 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:04:16,393 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:04:16,393 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:04:16,393 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:04:16,393 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:04:16,393 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:04:16,393 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:04:16,394 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:04:16,394 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:04:16,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:04:16,395 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:04:16,395 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:04:16,395 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:04:16,395 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 11:04:16,395 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:04:16,395 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 11:04:16,396 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 11:04:16,396 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 11:04:16,396 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 11:04:16,396 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:04:16,396 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 11:04:16,396 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:04:16,396 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 11:04:16,397 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:04:16,397 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 11:04:16,397 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:04:16,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:04:16,397 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:04:16,398 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:04:16,398 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 11:04:16,398 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 11:04:16,398 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 11:04:16,398 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 11:04:16,398 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:04:16,398 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 11:04:16,398 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_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf0fb52bead8e180875472b49ad053a30663ea61c3025c1e008ec598b0fa4db0 [2022-12-14 11:04:16,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:04:16,642 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:04:16,644 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:04:16,646 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:04:16,646 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:04:16,647 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c [2022-12-14 11:04:19,283 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:04:19,461 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:04:19,461 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c [2022-12-14 11:04:19,467 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/data/e56862a0c/52b1fb56074d4b86bd9e747d82c5d9aa/FLAG66ddeb566 [2022-12-14 11:04:19,478 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/data/e56862a0c/52b1fb56074d4b86bd9e747d82c5d9aa [2022-12-14 11:04:19,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:04:19,481 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:04:19,481 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:04:19,481 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:04:19,484 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:04:19,484 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:04:19" (1/1) ... [2022-12-14 11:04:19,485 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a369545 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:04:19, skipping insertion in model container [2022-12-14 11:04:19,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:04:19" (1/1) ... [2022-12-14 11:04:19,490 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:04:19,508 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:04:19,624 WARN L237 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_4dc124d1-f1ed-4438-8415-a95a2f894ee9/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c[1995,2008] [2022-12-14 11:04:19,630 WARN L237 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_4dc124d1-f1ed-4438-8415-a95a2f894ee9/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c[2364,2377] [2022-12-14 11:04:19,654 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:04:19,664 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:04:19,675 WARN L237 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_4dc124d1-f1ed-4438-8415-a95a2f894ee9/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c[1995,2008] [2022-12-14 11:04:19,676 WARN L237 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_4dc124d1-f1ed-4438-8415-a95a2f894ee9/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c[2364,2377] [2022-12-14 11:04:19,693 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:04:19,704 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:04:19,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:04:19 WrapperNode [2022-12-14 11:04:19,704 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:04:19,705 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:04:19,705 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:04:19,705 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:04:19,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:04:19" (1/1) ... [2022-12-14 11:04:19,722 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:04:19" (1/1) ... [2022-12-14 11:04:19,745 INFO L138 Inliner]: procedures = 28, calls = 17, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 129 [2022-12-14 11:04:19,745 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:04:19,746 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:04:19,746 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:04:19,746 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:04:19,754 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:04:19" (1/1) ... [2022-12-14 11:04:19,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:04:19" (1/1) ... [2022-12-14 11:04:19,758 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:04:19" (1/1) ... [2022-12-14 11:04:19,758 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:04:19" (1/1) ... [2022-12-14 11:04:19,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:04:19" (1/1) ... [2022-12-14 11:04:19,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:04:19" (1/1) ... [2022-12-14 11:04:19,772 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:04:19" (1/1) ... [2022-12-14 11:04:19,774 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:04:19" (1/1) ... [2022-12-14 11:04:19,777 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:04:19,778 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:04:19,779 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:04:19,779 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:04:19,779 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:04:19" (1/1) ... [2022-12-14 11:04:19,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:04:19,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:04:19,806 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:04:19,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:04:19,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:04:19,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 11:04:19,839 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-12-14 11:04:19,839 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-12-14 11:04:19,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:04:19,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:04:19,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 11:04:19,840 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 11:04:19,904 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:04:19,906 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:04:22,310 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:04:22,317 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:04:22,317 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 11:04:22,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:04:22 BoogieIcfgContainer [2022-12-14 11:04:22,319 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:04:22,321 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:04:22,321 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:04:22,323 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:04:22,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:04:19" (1/3) ... [2022-12-14 11:04:22,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28f273fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:04:22, skipping insertion in model container [2022-12-14 11:04:22,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:04:19" (2/3) ... [2022-12-14 11:04:22,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28f273fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:04:22, skipping insertion in model container [2022-12-14 11:04:22,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:04:22" (3/3) ... [2022-12-14 11:04:22,326 INFO L112 eAbstractionObserver]: Analyzing ICFG square_7+soft_float_3a.c.cil.c [2022-12-14 11:04:22,340 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:04:22,340 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 11:04:22,376 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:04:22,381 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;@22c529d3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:04:22,381 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 11:04:22,384 INFO L276 IsEmpty]: Start isEmpty. Operand has 60 states, 50 states have (on average 1.56) internal successors, (78), 53 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 11:04:22,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 11:04:22,390 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:04:22,390 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:04:22,390 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:04:22,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:04:22,394 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2022-12-14 11:04:22,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:04:22,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2018902806] [2022-12-14 11:04:22,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:04:22,404 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:04:22,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:04:22,405 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:04:22,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-14 11:04:22,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:04:22,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-14 11:04:22,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:04:22,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:04:22,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:04:22,875 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:04:22,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2018902806] [2022-12-14 11:04:22,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2018902806] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:04:22,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:04:22,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:04:22,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664717218] [2022-12-14 11:04:22,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:04:22,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 11:04:22,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:04:22,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 11:04:22,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 11:04:22,902 INFO L87 Difference]: Start difference. First operand has 60 states, 50 states have (on average 1.56) internal successors, (78), 53 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:04:22,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:04:22,920 INFO L93 Difference]: Finished difference Result 115 states and 173 transitions. [2022-12-14 11:04:22,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 11:04:22,922 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 11:04:22,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:04:22,927 INFO L225 Difference]: With dead ends: 115 [2022-12-14 11:04:22,927 INFO L226 Difference]: Without dead ends: 51 [2022-12-14 11:04:22,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 11:04:22,931 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:04:22,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:04:22,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-12-14 11:04:22,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-12-14 11:04:22,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 44 states have internal predecessors, (61), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 11:04:22,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2022-12-14 11:04:22,958 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 7 [2022-12-14 11:04:22,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:04:22,958 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2022-12-14 11:04:22,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:04:22,958 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2022-12-14 11:04:22,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 11:04:22,958 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:04:22,959 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:04:22,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-14 11:04:23,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:04:23,161 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:04:23,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:04:23,163 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2022-12-14 11:04:23,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:04:23,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2098895723] [2022-12-14 11:04:23,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:04:23,166 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:04:23,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:04:23,170 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:04:23,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-14 11:07:21,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:07:21,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 11:07:21,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:07:36,120 WARN L837 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0) (= (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) |c_ULTIMATE.start_main1_~result~0#1|) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2022-12-14 11:08:09,747 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0))) (.cse2 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0))) (.cse3 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0))) (.cse4 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0))) (.cse0 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (or (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (and (not (fp.lt (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) ((_ to_fp 8 24) roundNearestTiesToEven (/ 7.0 5.0)))) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0))) (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (not (fp.geq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (_ +zero 8 24))) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0))))) is different from false [2022-12-14 11:08:11,790 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0))) (.cse2 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0))) (.cse3 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0))) (.cse4 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0))) (.cse0 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (or (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (and (not (fp.lt (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) ((_ to_fp 8 24) roundNearestTiesToEven (/ 7.0 5.0)))) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0))) (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (not (fp.geq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (_ +zero 8 24))) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0))))) is different from true [2022-12-14 11:08:11,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:08:11,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:08:11,791 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:08:11,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2098895723] [2022-12-14 11:08:11,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2098895723] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:08:11,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:08:11,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 11:08:11,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334224100] [2022-12-14 11:08:11,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:08:11,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:08:11,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:08:11,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:08:11,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2022-12-14 11:08:11,795 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:08:14,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 11:08:16,407 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse1 (fp.lt |c_ULTIMATE.start_main1_~IN~0#1| .cse0)) (.cse2 (fp.geq |c_ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)))) (and (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (and (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0) (= (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) |c_ULTIMATE.start_main1_~result~0#1|) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)))) .cse1 (or (and (or (not .cse1) (not .cse2)) (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv0 32))) (and .cse1 (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv1 32)) .cse2)) .cse2 (= c_currentRoundingMode roundNearestTiesToEven)))) is different from false [2022-12-14 11:08:16,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:08:16,550 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2022-12-14 11:08:16,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:08:16,551 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 11:08:16,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:08:16,552 INFO L225 Difference]: With dead ends: 51 [2022-12-14 11:08:16,552 INFO L226 Difference]: Without dead ends: 46 [2022-12-14 11:08:16,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=20, Invalid=18, Unknown=4, NotChecked=30, Total=72 [2022-12-14 11:08:16,554 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 66 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:08:16,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 175 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 1 Unknown, 136 Unchecked, 2.4s Time] [2022-12-14 11:08:16,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-12-14 11:08:16,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-12-14 11:08:16,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.435897435897436) internal successors, (56), 39 states have internal predecessors, (56), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 11:08:16,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 65 transitions. [2022-12-14 11:08:16,563 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 65 transitions. Word has length 7 [2022-12-14 11:08:16,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:08:16,563 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 65 transitions. [2022-12-14 11:08:16,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:08:16,564 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 65 transitions. [2022-12-14 11:08:16,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 11:08:16,565 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:08:16,566 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:08:16,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-14 11:08:16,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:08:16,768 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:08:16,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:08:16,769 INFO L85 PathProgramCache]: Analyzing trace with hash 220430878, now seen corresponding path program 1 times [2022-12-14 11:08:16,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:08:16,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [193466783] [2022-12-14 11:08:16,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:08:16,774 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:08:16,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:08:16,775 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:08:16,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-14 11:08:16,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:08:16,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 11:08:16,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:08:16,959 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:08:16,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:08:16,959 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:08:16,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [193466783] [2022-12-14 11:08:16,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [193466783] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:08:16,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:08:16,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:08:16,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183723589] [2022-12-14 11:08:16,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:08:16,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:08:16,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:08:16,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:08:16,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:08:16,963 INFO L87 Difference]: Start difference. First operand 46 states and 65 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 11:08:17,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:08:17,309 INFO L93 Difference]: Finished difference Result 102 states and 148 transitions. [2022-12-14 11:08:17,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:08:17,310 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2022-12-14 11:08:17,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:08:17,312 INFO L225 Difference]: With dead ends: 102 [2022-12-14 11:08:17,312 INFO L226 Difference]: Without dead ends: 60 [2022-12-14 11:08:17,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:08:17,313 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 16 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:08:17,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 143 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:08:17,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-12-14 11:08:17,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 51. [2022-12-14 11:08:17,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 43 states have internal predecessors, (60), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 11:08:17,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 71 transitions. [2022-12-14 11:08:17,321 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 71 transitions. Word has length 42 [2022-12-14 11:08:17,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:08:17,322 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 71 transitions. [2022-12-14 11:08:17,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 11:08:17,322 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 71 transitions. [2022-12-14 11:08:17,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 11:08:17,323 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:08:17,323 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-12-14 11:08:17,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-14 11:08:17,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:08:17,525 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:08:17,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:08:17,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1744233432, now seen corresponding path program 1 times [2022-12-14 11:08:17,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:08:17,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1268828937] [2022-12-14 11:08:17,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:08:17,529 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:08:17,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:08:17,532 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:08:17,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-14 11:08:17,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:08:17,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 11:08:17,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:08:17,752 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:08:17,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:08:17,753 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:08:17,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1268828937] [2022-12-14 11:08:17,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1268828937] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:08:17,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:08:17,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:08:17,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427498632] [2022-12-14 11:08:17,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:08:17,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:08:17,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:08:17,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:08:17,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:08:17,755 INFO L87 Difference]: Start difference. First operand 51 states and 71 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, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 11:08:18,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:08:18,058 INFO L93 Difference]: Finished difference Result 106 states and 151 transitions. [2022-12-14 11:08:18,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:08:18,059 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, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2022-12-14 11:08:18,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:08:18,060 INFO L225 Difference]: With dead ends: 106 [2022-12-14 11:08:18,060 INFO L226 Difference]: Without dead ends: 63 [2022-12-14 11:08:18,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:08:18,062 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 10 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:08:18,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 157 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:08:18,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-12-14 11:08:18,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2022-12-14 11:08:18,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 48 states have internal predecessors, (65), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 11:08:18,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 78 transitions. [2022-12-14 11:08:18,069 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 78 transitions. Word has length 45 [2022-12-14 11:08:18,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:08:18,069 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 78 transitions. [2022-12-14 11:08:18,070 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, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 11:08:18,070 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 78 transitions. [2022-12-14 11:08:18,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 11:08:18,071 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:08:18,071 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-12-14 11:08:18,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-14 11:08:18,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:08:18,273 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:08:18,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:08:18,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1089123319, now seen corresponding path program 1 times [2022-12-14 11:08:18,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:08:18,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [367313094] [2022-12-14 11:08:18,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:08:18,276 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:08:18,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:08:18,279 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:08:18,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-14 11:08:18,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:08:18,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 11:08:18,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:08:18,460 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:08:18,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:08:18,460 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:08:18,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [367313094] [2022-12-14 11:08:18,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [367313094] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:08:18,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:08:18,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 11:08:18,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270040850] [2022-12-14 11:08:18,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:08:18,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:08:18,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:08:18,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:08:18,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:08:18,462 INFO L87 Difference]: Start difference. First operand 56 states and 78 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, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 11:08:18,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:08:18,822 INFO L93 Difference]: Finished difference Result 115 states and 163 transitions. [2022-12-14 11:08:18,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:08:18,824 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, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2022-12-14 11:08:18,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:08:18,824 INFO L225 Difference]: With dead ends: 115 [2022-12-14 11:08:18,825 INFO L226 Difference]: Without dead ends: 67 [2022-12-14 11:08:18,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:08:18,826 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 17 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:08:18,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 150 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:08:18,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-12-14 11:08:18,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2022-12-14 11:08:18,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.375) internal successors, (66), 49 states have internal predecessors, (66), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 11:08:18,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2022-12-14 11:08:18,834 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 46 [2022-12-14 11:08:18,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:08:18,834 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2022-12-14 11:08:18,834 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, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 11:08:18,834 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2022-12-14 11:08:18,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 11:08:18,835 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:08:18,835 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-12-14 11:08:18,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-12-14 11:08:19,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:08:19,037 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:08:19,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:08:19,038 INFO L85 PathProgramCache]: Analyzing trace with hash 957340839, now seen corresponding path program 1 times [2022-12-14 11:08:19,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:08:19,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1101311111] [2022-12-14 11:08:19,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:08:19,040 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:08:19,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:08:19,041 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:08:19,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-14 11:08:19,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:08:19,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 11:08:19,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:08:19,318 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:08:19,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:08:19,318 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:08:19,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1101311111] [2022-12-14 11:08:19,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1101311111] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:08:19,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:08:19,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 11:08:19,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074106256] [2022-12-14 11:08:19,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:08:19,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:08:19,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:08:19,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:08:19,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:08:19,321 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 11:08:19,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:08:19,945 INFO L93 Difference]: Finished difference Result 123 states and 174 transitions. [2022-12-14 11:08:19,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:08:19,946 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2022-12-14 11:08:19,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:08:19,947 INFO L225 Difference]: With dead ends: 123 [2022-12-14 11:08:19,947 INFO L226 Difference]: Without dead ends: 74 [2022-12-14 11:08:19,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:08:19,948 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 19 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:08:19,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 198 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:08:19,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-12-14 11:08:19,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 58. [2022-12-14 11:08:19,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 50 states have internal predecessors, (68), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 11:08:19,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 81 transitions. [2022-12-14 11:08:19,957 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 81 transitions. Word has length 47 [2022-12-14 11:08:19,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:08:19,957 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 81 transitions. [2022-12-14 11:08:19,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 11:08:19,957 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 81 transitions. [2022-12-14 11:08:19,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 11:08:19,958 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:08:19,958 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-12-14 11:08:19,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-14 11:08:20,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:08:20,161 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:08:20,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:08:20,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1066513524, now seen corresponding path program 1 times [2022-12-14 11:08:20,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:08:20,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1737003926] [2022-12-14 11:08:20,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:08:20,164 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:08:20,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:08:20,166 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:08:20,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-14 11:08:20,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:08:20,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 11:08:20,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:08:20,499 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:08:20,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:08:21,057 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 11:08:21,057 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:08:21,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1737003926] [2022-12-14 11:08:21,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1737003926] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:08:21,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [356712848] [2022-12-14 11:08:21,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:08:21,058 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:08:21,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:08:21,059 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:08:21,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-12-14 11:08:21,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:08:21,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 11:08:21,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:08:21,192 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 11:08:21,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:08:21,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [356712848] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:08:21,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:08:21,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-12-14 11:08:21,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570675308] [2022-12-14 11:08:21,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:08:21,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:08:21,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:08:21,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:08:21,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:08:21,194 INFO L87 Difference]: Start difference. First operand 58 states and 81 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 11:08:21,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:08:21,218 INFO L93 Difference]: Finished difference Result 67 states and 91 transitions. [2022-12-14 11:08:21,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:08:21,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2022-12-14 11:08:21,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:08:21,221 INFO L225 Difference]: With dead ends: 67 [2022-12-14 11:08:21,221 INFO L226 Difference]: Without dead ends: 58 [2022-12-14 11:08:21,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:08:21,222 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 0 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:08:21,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 126 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:08:21,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-14 11:08:21,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-12-14 11:08:21,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 50 states have internal predecessors, (67), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 11:08:21,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 80 transitions. [2022-12-14 11:08:21,232 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 80 transitions. Word has length 48 [2022-12-14 11:08:21,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:08:21,232 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 80 transitions. [2022-12-14 11:08:21,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 11:08:21,233 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 80 transitions. [2022-12-14 11:08:21,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 11:08:21,234 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:08:21,234 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-12-14 11:08:21,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-12-14 11:08:21,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-12-14 11:08:21,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:08:21,638 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:08:21,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:08:21,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1967363502, now seen corresponding path program 1 times [2022-12-14 11:08:21,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:08:21,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2035233391] [2022-12-14 11:08:21,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:08:21,640 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:08:21,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:08:21,643 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:08:21,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-14 11:08:21,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:08:21,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 11:08:21,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:08:21,953 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:08:21,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:08:22,482 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 11:08:22,483 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:08:22,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2035233391] [2022-12-14 11:08:22,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2035233391] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:08:22,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1423522121] [2022-12-14 11:08:22,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:08:22,483 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:08:22,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:08:22,484 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:08:22,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-12-14 11:08:22,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:08:22,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:08:22,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:08:22,716 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 11:08:22,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:08:22,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1423522121] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:08:22,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:08:22,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 10 [2022-12-14 11:08:22,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104825984] [2022-12-14 11:08:22,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:08:22,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:08:22,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:08:22,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:08:22,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-12-14 11:08:22,718 INFO L87 Difference]: Start difference. First operand 58 states and 80 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 11:08:22,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:08:22,842 INFO L93 Difference]: Finished difference Result 68 states and 91 transitions. [2022-12-14 11:08:22,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:08:22,843 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2022-12-14 11:08:22,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:08:22,844 INFO L225 Difference]: With dead ends: 68 [2022-12-14 11:08:22,844 INFO L226 Difference]: Without dead ends: 58 [2022-12-14 11:08:22,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-12-14 11:08:22,845 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 1 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:08:22,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 184 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:08:22,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-14 11:08:22,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-12-14 11:08:22,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.346938775510204) internal successors, (66), 50 states have internal predecessors, (66), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 11:08:22,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 79 transitions. [2022-12-14 11:08:22,855 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 79 transitions. Word has length 50 [2022-12-14 11:08:22,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:08:22,856 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 79 transitions. [2022-12-14 11:08:22,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 11:08:22,856 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 79 transitions. [2022-12-14 11:08:22,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 11:08:22,857 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:08:22,857 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-12-14 11:08:22,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2022-12-14 11:08:23,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-14 11:08:23,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:08:23,261 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:08:23,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:08:23,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1518257168, now seen corresponding path program 1 times [2022-12-14 11:08:23,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:08:23,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1356103408] [2022-12-14 11:08:23,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:08:23,263 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:08:23,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:08:23,266 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:08:23,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-14 11:08:23,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:08:23,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 11:08:23,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:08:23,542 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:08:23,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:08:24,052 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 11:08:24,053 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:08:24,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1356103408] [2022-12-14 11:08:24,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1356103408] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:08:24,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [596472401] [2022-12-14 11:08:24,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:08:24,053 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:08:24,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:08:24,054 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:08:24,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-12-14 11:08:24,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:08:24,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 11:08:24,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:08:24,521 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 11:08:24,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:08:24,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [596472401] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:08:24,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:08:24,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 5] total 12 [2022-12-14 11:08:24,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463542903] [2022-12-14 11:08:24,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:08:24,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:08:24,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:08:24,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:08:24,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-12-14 11:08:24,523 INFO L87 Difference]: Start difference. First operand 58 states and 79 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 11:08:24,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:08:24,794 INFO L93 Difference]: Finished difference Result 98 states and 133 transitions. [2022-12-14 11:08:24,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:08:24,795 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2022-12-14 11:08:24,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:08:24,796 INFO L225 Difference]: With dead ends: 98 [2022-12-14 11:08:24,796 INFO L226 Difference]: Without dead ends: 77 [2022-12-14 11:08:24,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-12-14 11:08:24,797 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 15 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:08:24,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 283 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:08:24,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-12-14 11:08:24,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2022-12-14 11:08:24,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 58 states have internal predecessors, (73), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-12-14 11:08:24,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2022-12-14 11:08:24,804 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 50 [2022-12-14 11:08:24,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:08:24,804 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2022-12-14 11:08:24,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 11:08:24,804 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2022-12-14 11:08:24,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 11:08:24,805 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:08:24,805 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-12-14 11:08:24,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2022-12-14 11:08:25,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-12-14 11:08:25,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:08:25,207 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:08:25,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:08:25,208 INFO L85 PathProgramCache]: Analyzing trace with hash 931451154, now seen corresponding path program 1 times [2022-12-14 11:08:25,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:08:25,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [434755826] [2022-12-14 11:08:25,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:08:25,209 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:08:25,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:08:25,210 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:08:25,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-12-14 11:08:25,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:08:25,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 11:08:25,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:08:25,490 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:08:25,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:08:26,043 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 11:08:26,043 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:08:26,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [434755826] [2022-12-14 11:08:26,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [434755826] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:08:26,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1125530653] [2022-12-14 11:08:26,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:08:26,043 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:08:26,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:08:26,044 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:08:26,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-12-14 11:08:26,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:08:26,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:08:26,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:08:26,609 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 11:08:26,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:08:26,939 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 11:08:26,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1125530653] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:08:26,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535354420] [2022-12-14 11:08:26,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:08:26,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:08:26,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:08:26,941 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:08:26,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 11:08:26,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:08:26,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 11:08:26,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:08:27,102 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:08:27,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:08:27,418 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 11:08:27,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535354420] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:08:27,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:08:27,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 5, 5] total 12 [2022-12-14 11:08:27,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242623620] [2022-12-14 11:08:27,419 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:08:27,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 11:08:27,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:08:27,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 11:08:27,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-12-14 11:08:27,421 INFO L87 Difference]: Start difference. First operand 67 states and 91 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 3 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 11:08:29,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:08:29,923 INFO L93 Difference]: Finished difference Result 186 states and 270 transitions. [2022-12-14 11:08:29,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 11:08:29,925 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 3 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 50 [2022-12-14 11:08:29,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:08:29,926 INFO L225 Difference]: With dead ends: 186 [2022-12-14 11:08:29,926 INFO L226 Difference]: Without dead ends: 127 [2022-12-14 11:08:29,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2022-12-14 11:08:29,927 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 78 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:08:29,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 388 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 11:08:29,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-12-14 11:08:29,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 96. [2022-12-14 11:08:29,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 84 states have (on average 1.3452380952380953) internal successors, (113), 84 states have internal predecessors, (113), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2022-12-14 11:08:29,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 137 transitions. [2022-12-14 11:08:29,944 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 137 transitions. Word has length 50 [2022-12-14 11:08:29,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:08:29,944 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 137 transitions. [2022-12-14 11:08:29,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 3 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 11:08:29,945 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 137 transitions. [2022-12-14 11:08:29,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 11:08:29,946 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:08:29,946 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:08:29,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2022-12-14 11:08:30,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 11:08:30,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-12-14 11:08:30,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:08:30,549 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:08:30,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:08:30,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1265138967, now seen corresponding path program 1 times [2022-12-14 11:08:30,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:08:30,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [729250482] [2022-12-14 11:08:30,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:08:30,550 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:08:30,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:08:30,551 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:08:30,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-14 11:08:30,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:08:30,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:08:30,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:08:30,901 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:08:30,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:08:31,539 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 11:08:31,540 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:08:31,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [729250482] [2022-12-14 11:08:31,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [729250482] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:08:31,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1881778024] [2022-12-14 11:08:31,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:08:31,540 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:08:31,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:08:31,541 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:08:31,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-12-14 11:08:31,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:08:31,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 11:08:31,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:08:31,981 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 11:08:31,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:08:31,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1881778024] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:08:31,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:08:31,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2022-12-14 11:08:31,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485829991] [2022-12-14 11:08:31,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:08:31,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:08:31,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:08:31,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:08:31,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-12-14 11:08:31,982 INFO L87 Difference]: Start difference. First operand 96 states and 137 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 11:08:32,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:08:32,331 INFO L93 Difference]: Finished difference Result 119 states and 161 transitions. [2022-12-14 11:08:32,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:08:32,332 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 54 [2022-12-14 11:08:32,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:08:32,333 INFO L225 Difference]: With dead ends: 119 [2022-12-14 11:08:32,333 INFO L226 Difference]: Without dead ends: 113 [2022-12-14 11:08:32,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-12-14 11:08:32,334 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 22 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:08:32,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 229 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:08:32,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-12-14 11:08:32,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2022-12-14 11:08:32,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 99 states have (on average 1.303030303030303) internal successors, (129), 99 states have internal predecessors, (129), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2022-12-14 11:08:32,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 153 transitions. [2022-12-14 11:08:32,343 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 153 transitions. Word has length 54 [2022-12-14 11:08:32,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:08:32,343 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 153 transitions. [2022-12-14 11:08:32,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 11:08:32,344 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 153 transitions. [2022-12-14 11:08:32,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 11:08:32,344 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:08:32,344 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:08:32,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-12-14 11:08:32,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2022-12-14 11:08:32,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:08:32,746 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:08:32,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:08:32,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1322397269, now seen corresponding path program 1 times [2022-12-14 11:08:32,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:08:32,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1222316636] [2022-12-14 11:08:32,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:08:32,749 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:08:32,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:08:32,752 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:08:32,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-12-14 11:08:32,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:08:32,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:08:32,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:08:33,126 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:08:33,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:08:33,749 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 11:08:33,749 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:08:33,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1222316636] [2022-12-14 11:08:33,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1222316636] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:08:33,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2111884609] [2022-12-14 11:08:33,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:08:33,750 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:08:33,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:08:33,751 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:08:33,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-12-14 11:08:33,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:08:33,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:08:33,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:08:33,962 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:08:33,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:08:34,254 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 11:08:34,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2111884609] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:08:34,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545870139] [2022-12-14 11:08:34,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:08:34,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:08:34,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:08:34,256 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:08:34,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 11:08:34,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:08:34,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 11:08:34,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:08:34,983 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 11:08:34,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:08:35,447 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 11:08:35,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545870139] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 11:08:35,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2022-12-14 11:08:35,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6, 6, 6, 8] total 17 [2022-12-14 11:08:35,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610149340] [2022-12-14 11:08:35,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:08:35,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:08:35,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:08:35,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:08:35,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-12-14 11:08:35,449 INFO L87 Difference]: Start difference. First operand 111 states and 153 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 11:08:35,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:08:35,814 INFO L93 Difference]: Finished difference Result 117 states and 158 transitions. [2022-12-14 11:08:35,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:08:35,815 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 54 [2022-12-14 11:08:35,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:08:35,816 INFO L225 Difference]: With dead ends: 117 [2022-12-14 11:08:35,816 INFO L226 Difference]: Without dead ends: 100 [2022-12-14 11:08:35,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-12-14 11:08:35,817 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 2 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:08:35,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 295 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:08:35,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-12-14 11:08:35,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-12-14 11:08:35,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 88 states have (on average 1.2954545454545454) internal successors, (114), 89 states have internal predecessors, (114), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-12-14 11:08:35,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 135 transitions. [2022-12-14 11:08:35,827 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 135 transitions. Word has length 54 [2022-12-14 11:08:35,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:08:35,827 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 135 transitions. [2022-12-14 11:08:35,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 11:08:35,827 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 135 transitions. [2022-12-14 11:08:35,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 11:08:35,828 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:08:35,828 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:08:35,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-14 11:08:36,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2022-12-14 11:08:36,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-12-14 11:08:36,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:08:36,431 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:08:36,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:08:36,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1182884870, now seen corresponding path program 1 times [2022-12-14 11:08:36,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:08:36,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1189366766] [2022-12-14 11:08:36,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:08:36,433 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:08:36,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:08:36,433 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:08:36,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-12-14 11:08:36,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:08:36,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:08:36,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:08:36,792 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:08:36,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:08:37,450 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 11:08:37,450 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:08:37,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1189366766] [2022-12-14 11:08:37,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1189366766] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:08:37,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1641362295] [2022-12-14 11:08:37,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:08:37,450 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:08:37,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:08:37,451 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:08:37,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-12-14 11:08:37,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:08:37,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:08:37,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:08:37,650 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:08:37,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:08:37,943 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 11:08:37,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1641362295] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:08:37,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983216676] [2022-12-14 11:08:37,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:08:37,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:08:37,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:08:37,945 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:08:37,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 11:08:37,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:08:37,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 11:08:37,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:08:38,474 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:08:38,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:08:39,155 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 11:08:39,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983216676] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:08:39,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:08:39,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 7, 7] total 15 [2022-12-14 11:08:39,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894202784] [2022-12-14 11:08:39,156 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:08:39,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 11:08:39,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:08:39,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 11:08:39,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-12-14 11:08:39,158 INFO L87 Difference]: Start difference. First operand 100 states and 135 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 11:08:41,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:08:41,143 INFO L93 Difference]: Finished difference Result 224 states and 309 transitions. [2022-12-14 11:08:41,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 11:08:41,145 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 56 [2022-12-14 11:08:41,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:08:41,146 INFO L225 Difference]: With dead ends: 224 [2022-12-14 11:08:41,146 INFO L226 Difference]: Without dead ends: 132 [2022-12-14 11:08:41,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2022-12-14 11:08:41,147 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 80 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:08:41,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 423 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 11:08:41,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-12-14 11:08:41,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 104. [2022-12-14 11:08:41,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 92 states have (on average 1.315217391304348) internal successors, (121), 93 states have internal predecessors, (121), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-12-14 11:08:41,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 142 transitions. [2022-12-14 11:08:41,156 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 142 transitions. Word has length 56 [2022-12-14 11:08:41,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:08:41,157 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 142 transitions. [2022-12-14 11:08:41,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 11:08:41,157 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 142 transitions. [2022-12-14 11:08:41,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 11:08:41,157 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:08:41,157 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:08:41,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-14 11:08:41,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2022-12-14 11:08:41,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-12-14 11:08:41,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:08:41,760 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:08:41,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:08:41,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1175617949, now seen corresponding path program 1 times [2022-12-14 11:08:41,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:08:41,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [635782551] [2022-12-14 11:08:41,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:08:41,763 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:08:41,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:08:41,766 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:08:41,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-12-14 11:08:41,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:08:41,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 11:08:41,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:08:42,343 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:08:42,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:08:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 11:08:43,610 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:08:43,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [635782551] [2022-12-14 11:08:43,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [635782551] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:08:43,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [746714805] [2022-12-14 11:08:43,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:08:43,610 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:08:43,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:08:43,611 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:08:43,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-12-14 11:08:43,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:08:43,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 11:08:43,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:08:43,941 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:08:43,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:08:44,508 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 11:08:44,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [746714805] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:08:44,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60393663] [2022-12-14 11:08:44,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:08:44,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:08:44,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:08:44,510 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:08:44,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-14 11:08:44,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:08:44,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 11:08:44,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:08:45,113 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:08:45,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:08:46,725 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 11:08:46,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60393663] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:08:46,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:08:46,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2022-12-14 11:08:46,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137112118] [2022-12-14 11:08:46,726 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:08:46,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 11:08:46,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:08:46,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 11:08:46,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2022-12-14 11:08:46,727 INFO L87 Difference]: Start difference. First operand 104 states and 142 transitions. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 11:08:51,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:08:51,109 INFO L93 Difference]: Finished difference Result 271 states and 386 transitions. [2022-12-14 11:08:51,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 11:08:51,110 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 63 [2022-12-14 11:08:51,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:08:51,112 INFO L225 Difference]: With dead ends: 271 [2022-12-14 11:08:51,112 INFO L226 Difference]: Without dead ends: 175 [2022-12-14 11:08:51,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=316, Invalid=554, Unknown=0, NotChecked=0, Total=870 [2022-12-14 11:08:51,113 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 187 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:08:51,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 648 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 11:08:51,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-12-14 11:08:51,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 118. [2022-12-14 11:08:51,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 106 states have (on average 1.3584905660377358) internal successors, (144), 107 states have internal predecessors, (144), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-12-14 11:08:51,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 165 transitions. [2022-12-14 11:08:51,136 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 165 transitions. Word has length 63 [2022-12-14 11:08:51,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:08:51,137 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 165 transitions. [2022-12-14 11:08:51,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 11:08:51,137 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 165 transitions. [2022-12-14 11:08:51,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-14 11:08:51,138 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:08:51,138 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:08:51,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2022-12-14 11:08:51,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-12-14 11:08:51,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-14 11:08:51,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:08:51,739 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:08:51,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:08:51,741 INFO L85 PathProgramCache]: Analyzing trace with hash 369916166, now seen corresponding path program 2 times [2022-12-14 11:08:51,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:08:51,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1702543763] [2022-12-14 11:08:51,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:08:51,743 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:08:51,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:08:51,745 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:08:51,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-12-14 11:08:51,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:08:51,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:08:51,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 11:08:51,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:08:52,541 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:08:52,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:08:54,140 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 11:08:54,140 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:08:54,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1702543763] [2022-12-14 11:08:54,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1702543763] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:08:54,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [174464287] [2022-12-14 11:08:54,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:08:54,141 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:08:54,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:08:54,142 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:08:54,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-12-14 11:08:54,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:08:54,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:08:54,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 11:08:54,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:08:54,487 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:08:54,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:08:55,100 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 11:08:55,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [174464287] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:08:55,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892490015] [2022-12-14 11:08:55,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:08:55,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:08:55,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:08:55,101 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:08:55,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-14 11:08:55,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:08:55,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:08:55,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 11:08:55,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:08:55,926 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:08:55,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:08:57,861 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 11:08:57,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892490015] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:08:57,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:08:57,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 27 [2022-12-14 11:08:57,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960186191] [2022-12-14 11:08:57,861 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:08:57,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 11:08:57,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:08:57,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 11:08:57,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=469, Unknown=0, NotChecked=0, Total=702 [2022-12-14 11:08:57,863 INFO L87 Difference]: Start difference. First operand 118 states and 165 transitions. Second operand has 27 states, 27 states have (on average 4.074074074074074) internal successors, (110), 27 states have internal predecessors, (110), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 11:09:02,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:09:02,753 INFO L93 Difference]: Finished difference Result 294 states and 417 transitions. [2022-12-14 11:09:02,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 11:09:02,754 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.074074074074074) internal successors, (110), 27 states have internal predecessors, (110), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 68 [2022-12-14 11:09:02,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:09:02,755 INFO L225 Difference]: With dead ends: 294 [2022-12-14 11:09:02,755 INFO L226 Difference]: Without dead ends: 184 [2022-12-14 11:09:02,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=581, Invalid=1059, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 11:09:02,756 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 316 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:09:02,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 686 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-12-14 11:09:02,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-12-14 11:09:02,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 128. [2022-12-14 11:09:02,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 116 states have (on average 1.3879310344827587) internal successors, (161), 117 states have internal predecessors, (161), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-12-14 11:09:02,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 182 transitions. [2022-12-14 11:09:02,769 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 182 transitions. Word has length 68 [2022-12-14 11:09:02,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:09:02,770 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 182 transitions. [2022-12-14 11:09:02,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.074074074074074) internal successors, (110), 27 states have internal predecessors, (110), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 11:09:02,770 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 182 transitions. [2022-12-14 11:09:02,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-14 11:09:02,771 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:09:02,771 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:09:02,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-14 11:09:03,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-12-14 11:09:03,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2022-12-14 11:09:03,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:09:03,372 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:09:03,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:09:03,373 INFO L85 PathProgramCache]: Analyzing trace with hash -542294301, now seen corresponding path program 2 times [2022-12-14 11:09:03,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:09:03,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [955815943] [2022-12-14 11:09:03,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:09:03,375 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:09:03,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:09:03,378 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:09:03,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-12-14 11:09:03,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:09:03,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:09:03,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 11:09:03,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:09:04,880 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:09:04,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:09:08,471 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 11:09:08,471 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:09:08,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [955815943] [2022-12-14 11:09:08,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [955815943] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:09:08,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1116686378] [2022-12-14 11:09:08,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:09:08,472 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:09:08,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:09:08,473 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:09:08,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-12-14 11:09:08,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:09:08,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:09:08,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 11:09:08,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:09:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:09:09,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:09:10,145 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 11:09:10,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1116686378] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:09:10,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411499946] [2022-12-14 11:09:10,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:09:10,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:09:10,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:09:10,147 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:09:10,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-14 11:09:10,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:09:10,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:09:10,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 11:09:10,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:09:11,114 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:09:11,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:09:16,088 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 11:09:16,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411499946] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:09:16,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:09:16,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 14, 14] total 38 [2022-12-14 11:09:16,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992212675] [2022-12-14 11:09:16,089 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:09:16,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-14 11:09:16,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:09:16,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-14 11:09:16,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=959, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 11:09:16,091 INFO L87 Difference]: Start difference. First operand 128 states and 182 transitions. Second operand has 38 states, 38 states have (on average 3.9210526315789473) internal successors, (149), 38 states have internal predecessors, (149), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 11:09:32,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:09:32,435 INFO L93 Difference]: Finished difference Result 397 states and 586 transitions. [2022-12-14 11:09:32,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-14 11:09:32,437 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.9210526315789473) internal successors, (149), 38 states have internal predecessors, (149), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 81 [2022-12-14 11:09:32,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:09:32,438 INFO L225 Difference]: With dead ends: 397 [2022-12-14 11:09:32,438 INFO L226 Difference]: Without dead ends: 277 [2022-12-14 11:09:32,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=1210, Invalid=2330, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 11:09:32,440 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 591 mSDsluCounter, 1644 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 1767 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-12-14 11:09:32,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [591 Valid, 1767 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1295 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2022-12-14 11:09:32,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-12-14 11:09:32,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 154. [2022-12-14 11:09:32,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 142 states have (on average 1.4366197183098592) internal successors, (204), 143 states have internal predecessors, (204), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-12-14 11:09:32,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 225 transitions. [2022-12-14 11:09:32,465 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 225 transitions. Word has length 81 [2022-12-14 11:09:32,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:09:32,465 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 225 transitions. [2022-12-14 11:09:32,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.9210526315789473) internal successors, (149), 38 states have internal predecessors, (149), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 11:09:32,466 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 225 transitions. [2022-12-14 11:09:32,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-14 11:09:32,466 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:09:32,466 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:09:32,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2022-12-14 11:09:32,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-12-14 11:09:32,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-14 11:09:33,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:09:33,068 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:09:33,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:09:33,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1098654470, now seen corresponding path program 3 times [2022-12-14 11:09:33,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:09:33,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1044800387] [2022-12-14 11:09:33,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:09:33,071 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:09:33,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:09:33,074 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:09:33,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-12-14 11:09:33,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-12-14 11:09:33,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:09:33,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 11:09:33,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:09:38,275 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 10 proven. 283 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:09:38,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:09:48,939 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 10 proven. 283 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:09:48,939 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:09:48,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1044800387] [2022-12-14 11:09:48,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1044800387] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:09:48,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [110438968] [2022-12-14 11:09:48,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:09:48,939 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:09:48,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:09:48,940 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:09:48,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-12-14 11:09:49,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-12-14 11:09:49,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:09:49,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 11:09:49,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:10:07,035 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 10 proven. 283 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:10:07,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:10:10,635 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 10 proven. 283 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:10:10,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [110438968] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:10:10,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568885663] [2022-12-14 11:10:10,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:10:10,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:10:10,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:10:10,637 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:10:10,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-14 11:10:10,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-12-14 11:10:10,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:10:10,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 11:10:10,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:10:20,752 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 26 proven. 273 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:10:20,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:10:33,828 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 4 proven. 283 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 11:10:33,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568885663] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:10:33,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:10:33,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 25, 25, 19, 19] total 90 [2022-12-14 11:10:33,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150282151] [2022-12-14 11:10:33,829 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:10:33,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-12-14 11:10:33,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:10:33,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-12-14 11:10:33,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=7224, Unknown=6, NotChecked=0, Total=8010 [2022-12-14 11:10:33,832 INFO L87 Difference]: Start difference. First operand 154 states and 225 transitions. Second operand has 90 states, 90 states have (on average 2.977777777777778) internal successors, (268), 84 states have internal predecessors, (268), 5 states have call successors, (13), 2 states have call predecessors, (13), 8 states have return successors, (16), 11 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-14 11:12:38,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:15:59,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:59,472 INFO L93 Difference]: Finished difference Result 744 states and 1377 transitions. [2022-12-14 11:15:59,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2022-12-14 11:15:59,473 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.977777777777778) internal successors, (268), 84 states have internal predecessors, (268), 5 states have call successors, (13), 2 states have call predecessors, (13), 8 states have return successors, (16), 11 states have call predecessors, (16), 5 states have call successors, (16) Word has length 92 [2022-12-14 11:15:59,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:59,477 INFO L225 Difference]: With dead ends: 744 [2022-12-14 11:15:59,477 INFO L226 Difference]: Without dead ends: 592 [2022-12-14 11:15:59,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 811 GetRequests, 472 SyntacticMatches, 3 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39716 ImplicationChecksByTransitivity, 299.4s TimeCoverageRelationStatistics Valid=16677, Invalid=97219, Unknown=10, NotChecked=0, Total=113906 [2022-12-14 11:15:59,494 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 4685 mSDsluCounter, 4695 mSDsCounter, 0 mSdLazyCounter, 11036 mSolverCounterSat, 453 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 72.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4706 SdHoareTripleChecker+Valid, 4812 SdHoareTripleChecker+Invalid, 11490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 453 IncrementalHoareTripleChecker+Valid, 11036 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 75.7s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:59,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4706 Valid, 4812 Invalid, 11490 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [453 Valid, 11036 Invalid, 1 Unknown, 0 Unchecked, 75.7s Time] [2022-12-14 11:15:59,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-12-14 11:15:59,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 184. [2022-12-14 11:15:59,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 169 states have (on average 1.455621301775148) internal successors, (246), 171 states have internal predecessors, (246), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (28), 9 states have call predecessors, (28), 7 states have call successors, (28) [2022-12-14 11:15:59,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 282 transitions. [2022-12-14 11:15:59,567 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 282 transitions. Word has length 92 [2022-12-14 11:15:59,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:59,567 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 282 transitions. [2022-12-14 11:15:59,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.977777777777778) internal successors, (268), 84 states have internal predecessors, (268), 5 states have call successors, (13), 2 states have call predecessors, (13), 8 states have return successors, (16), 11 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-14 11:15:59,567 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 282 transitions. [2022-12-14 11:15:59,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-12-14 11:15:59,568 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:59,568 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:15:59,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-12-14 11:15:59,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2022-12-14 11:16:00,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-12-14 11:16:00,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:16:00,170 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:16:00,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:16:00,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1995923427, now seen corresponding path program 3 times [2022-12-14 11:16:00,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:16:00,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1346691402] [2022-12-14 11:16:00,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:16:00,174 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:16:00,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:16:00,175 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:16:00,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-12-14 11:16:00,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2022-12-14 11:16:00,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:16:00,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 11:16:00,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:16:06,137 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 25 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:16:06,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:16:21,132 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 746 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 11:16:21,132 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:16:21,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1346691402] [2022-12-14 11:16:21,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1346691402] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:16:21,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1186112243] [2022-12-14 11:16:21,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:16:21,133 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:16:21,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:16:21,134 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:16:21,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-12-14 11:16:21,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2022-12-14 11:16:21,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:16:21,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 11:16:21,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:16:23,973 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 25 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:16:23,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:16:27,604 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 746 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 11:16:27,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1186112243] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:16:27,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076491920] [2022-12-14 11:16:27,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:16:27,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:16:27,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:16:27,605 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:16:27,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-14 11:16:27,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2022-12-14 11:16:27,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:16:27,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 11:16:27,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:16:29,224 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 25 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:16:29,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:16:32,877 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 746 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 11:16:32,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076491920] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:16:32,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:16:32,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26, 26, 26, 26] total 54 [2022-12-14 11:16:32,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936785649] [2022-12-14 11:16:32,878 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:16:32,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-12-14 11:16:32,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:16:32,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-12-14 11:16:32,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=777, Invalid=2085, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 11:16:32,880 INFO L87 Difference]: Start difference. First operand 184 states and 282 transitions. Second operand has 54 states, 54 states have (on average 3.6296296296296298) internal successors, (196), 54 states have internal predecessors, (196), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 11:17:41,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:17:41,839 INFO L93 Difference]: Finished difference Result 657 states and 1119 transitions. [2022-12-14 11:17:41,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-12-14 11:17:41,841 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.6296296296296298) internal successors, (196), 54 states have internal predecessors, (196), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 117 [2022-12-14 11:17:41,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:17:41,844 INFO L225 Difference]: With dead ends: 657 [2022-12-14 11:17:41,844 INFO L226 Difference]: Without dead ends: 485 [2022-12-14 11:17:41,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 788 GetRequests, 689 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 55.6s TimeCoverageRelationStatistics Valid=3174, Invalid=6726, Unknown=0, NotChecked=0, Total=9900 [2022-12-14 11:17:41,846 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 1795 mSDsluCounter, 5202 mSDsCounter, 0 mSdLazyCounter, 4335 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1795 SdHoareTripleChecker+Valid, 5409 SdHoareTripleChecker+Invalid, 4405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 4335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.9s IncrementalHoareTripleChecker+Time [2022-12-14 11:17:41,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1795 Valid, 5409 Invalid, 4405 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [70 Valid, 4335 Invalid, 0 Unknown, 0 Unchecked, 29.9s Time] [2022-12-14 11:17:41,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-12-14 11:17:41,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 234. [2022-12-14 11:17:41,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 219 states have (on average 1.5022831050228311) internal successors, (329), 221 states have internal predecessors, (329), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (28), 9 states have call predecessors, (28), 7 states have call successors, (28) [2022-12-14 11:17:41,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 365 transitions. [2022-12-14 11:17:41,913 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 365 transitions. Word has length 117 [2022-12-14 11:17:41,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:17:41,914 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 365 transitions. [2022-12-14 11:17:41,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.6296296296296298) internal successors, (196), 54 states have internal predecessors, (196), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 11:17:41,914 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 365 transitions. [2022-12-14 11:17:41,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 11:17:41,915 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:17:41,916 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:17:41,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-12-14 11:17:42,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2022-12-14 11:17:42,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-12-14 11:17:42,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:17:42,519 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:17:42,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:17:42,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1258657602, now seen corresponding path program 1 times [2022-12-14 11:17:42,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:17:42,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1466966656] [2022-12-14 11:17:42,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:42,521 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:17:42,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:17:42,524 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:17:42,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-12-14 11:17:42,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:42,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 11:17:42,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:17:43,014 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2022-12-14 11:17:43,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:17:43,277 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2022-12-14 11:17:43,277 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:17:43,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1466966656] [2022-12-14 11:17:43,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1466966656] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:17:43,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [752071562] [2022-12-14 11:17:43,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:43,278 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:17:43,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:17:43,279 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:17:43,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-12-14 11:17:43,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:43,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 11:17:43,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:17:43,458 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2022-12-14 11:17:43,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:17:43,745 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2022-12-14 11:17:43,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [752071562] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:17:43,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834219228] [2022-12-14 11:17:43,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:43,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:17:43,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:17:43,747 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:17:43,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-14 11:17:43,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:43,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 11:17:43,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:17:43,898 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2022-12-14 11:17:43,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:17:44,160 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2022-12-14 11:17:44,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834219228] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:17:44,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:17:44,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 8 [2022-12-14 11:17:44,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456502026] [2022-12-14 11:17:44,161 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:17:44,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 11:17:44,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:17:44,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 11:17:44,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:17:44,163 INFO L87 Difference]: Start difference. First operand 234 states and 365 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 11:17:44,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:17:44,754 INFO L93 Difference]: Finished difference Result 250 states and 380 transitions. [2022-12-14 11:17:44,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 11:17:44,755 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 125 [2022-12-14 11:17:44,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:17:44,757 INFO L225 Difference]: With dead ends: 250 [2022-12-14 11:17:44,757 INFO L226 Difference]: Without dead ends: 224 [2022-12-14 11:17:44,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 748 GetRequests, 738 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-12-14 11:17:44,758 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 13 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:17:44,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 397 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:17:44,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-12-14 11:17:44,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 216. [2022-12-14 11:17:44,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 202 states have (on average 1.5198019801980198) internal successors, (307), 205 states have internal predecessors, (307), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2022-12-14 11:17:44,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 333 transitions. [2022-12-14 11:17:44,799 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 333 transitions. Word has length 125 [2022-12-14 11:17:44,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:17:44,799 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 333 transitions. [2022-12-14 11:17:44,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 11:17:44,799 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 333 transitions. [2022-12-14 11:17:44,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-14 11:17:44,800 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:17:44,800 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:17:44,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2022-12-14 11:17:45,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-12-14 11:17:45,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-12-14 11:17:45,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:17:45,403 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:17:45,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:17:45,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1209150703, now seen corresponding path program 1 times [2022-12-14 11:17:45,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:17:45,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [705734738] [2022-12-14 11:17:45,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:17:45,405 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:17:45,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:17:45,406 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:17:45,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-12-14 11:17:45,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:17:45,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 11:17:45,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:17:45,673 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 866 trivial. 0 not checked. [2022-12-14 11:17:45,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:17:45,673 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:17:45,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [705734738] [2022-12-14 11:17:45,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [705734738] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:17:45,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:17:45,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 11:17:45,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966034091] [2022-12-14 11:17:45,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:17:45,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:17:45,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:17:45,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:17:45,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:17:45,674 INFO L87 Difference]: Start difference. First operand 216 states and 333 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 11:17:46,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:17:46,001 INFO L93 Difference]: Finished difference Result 252 states and 375 transitions. [2022-12-14 11:17:46,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:17:46,002 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 126 [2022-12-14 11:17:46,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:17:46,004 INFO L225 Difference]: With dead ends: 252 [2022-12-14 11:17:46,004 INFO L226 Difference]: Without dead ends: 240 [2022-12-14 11:17:46,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:17:46,005 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 53 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:17:46,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 253 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:17:46,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-12-14 11:17:46,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 217. [2022-12-14 11:17:46,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 203 states have (on average 1.5172413793103448) internal successors, (308), 206 states have internal predecessors, (308), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2022-12-14 11:17:46,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 334 transitions. [2022-12-14 11:17:46,052 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 334 transitions. Word has length 126 [2022-12-14 11:17:46,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:17:46,052 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 334 transitions. [2022-12-14 11:17:46,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 11:17:46,052 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 334 transitions. [2022-12-14 11:17:46,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-14 11:17:46,053 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:17:46,053 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:17:46,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-12-14 11:17:46,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:17:46,254 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:17:46,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:17:46,255 INFO L85 PathProgramCache]: Analyzing trace with hash 622344689, now seen corresponding path program 4 times [2022-12-14 11:17:46,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:17:46,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2059692338] [2022-12-14 11:17:46,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:17:46,257 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:17:46,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:17:46,259 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:17:46,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-12-14 11:17:46,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:17:46,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:17:46,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-14 11:17:46,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:17:56,415 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 11:17:56,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:18:17,173 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 11:18:17,173 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:18:17,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2059692338] [2022-12-14 11:18:17,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2059692338] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:18:17,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2019223655] [2022-12-14 11:18:17,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:18:17,173 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:18:17,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:18:17,174 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:18:17,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-12-14 11:18:17,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:18:17,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:18:17,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-14 11:18:17,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:18:19,490 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 11:18:19,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:18:24,570 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 11:18:24,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2019223655] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:18:24,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892987357] [2022-12-14 11:18:24,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:18:24,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:18:24,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:18:24,571 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:18:24,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dc124d1-f1ed-4438-8415-a95a2f894ee9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-14 11:18:24,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:18:24,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:18:24,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-14 11:18:24,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:18:43,859 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 11:18:43,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:19:06,481 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 11:19:06,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892987357] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:19:06,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:19:06,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33, 33, 33, 33] total 122 [2022-12-14 11:19:06,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756103699] [2022-12-14 11:19:06,482 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:19:06,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-12-14 11:19:06,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:19:06,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-12-14 11:19:06,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2829, Invalid=11933, Unknown=0, NotChecked=0, Total=14762 [2022-12-14 11:19:06,487 INFO L87 Difference]: Start difference. First operand 217 states and 334 transitions. Second operand has 122 states, 122 states have (on average 2.918032786885246) internal successors, (356), 119 states have internal predecessors, (356), 5 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11)