./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 e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0 --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-e04fb08 [2022-11-16 20:25:16,189 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 20:25:16,191 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 20:25:16,227 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 20:25:16,228 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 20:25:16,233 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 20:25:16,234 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 20:25:16,236 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 20:25:16,238 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 20:25:16,238 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 20:25:16,239 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 20:25:16,240 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 20:25:16,241 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 20:25:16,242 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 20:25:16,243 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 20:25:16,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 20:25:16,245 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 20:25:16,258 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 20:25:16,261 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 20:25:16,267 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 20:25:16,268 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 20:25:16,273 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 20:25:16,274 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 20:25:16,275 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 20:25:16,279 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 20:25:16,279 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 20:25:16,279 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 20:25:16,280 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 20:25:16,281 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 20:25:16,282 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 20:25:16,282 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 20:25:16,283 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 20:25:16,284 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 20:25:16,284 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 20:25:16,291 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 20:25:16,292 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 20:25:16,293 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 20:25:16,293 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 20:25:16,293 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 20:25:16,294 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 20:25:16,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 20:25:16,296 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 20:25:16,339 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 20:25:16,339 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 20:25:16,340 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 20:25:16,340 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 20:25:16,341 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 20:25:16,341 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 20:25:16,341 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 20:25:16,341 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 20:25:16,346 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 20:25:16,346 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 20:25:16,347 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 20:25:16,347 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 20:25:16,348 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 20:25:16,348 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 20:25:16,348 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 20:25:16,348 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 20:25:16,348 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 20:25:16,348 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 20:25:16,349 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 20:25:16,349 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 20:25:16,350 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 20:25:16,350 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 20:25:16,350 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 20:25:16,350 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 20:25:16,351 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 20:25:16,351 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 20:25:16,351 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 20:25:16,351 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 20:25:16,351 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 20:25:16,352 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 20:25:16,352 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 20:25:16,352 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 20:25:16,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:25:16,353 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 20:25:16,353 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 20:25:16,353 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 20:25:16,353 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 20:25:16,353 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 20:25:16,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 20:25:16,354 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 20:25:16,354 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 20:25:16,354 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_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf0fb52bead8e180875472b49ad053a30663ea61c3025c1e008ec598b0fa4db0 [2022-11-16 20:25:16,684 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 20:25:16,718 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 20:25:16,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 20:25:16,723 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 20:25:16,724 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 20:25:16,726 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c [2022-11-16 20:25:16,817 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/data/b3dd47bde/1d8fb717211b42dd9e44c84308fbed96/FLAG8e832a4af [2022-11-16 20:25:17,363 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 20:25:17,363 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c [2022-11-16 20:25:17,381 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/data/b3dd47bde/1d8fb717211b42dd9e44c84308fbed96/FLAG8e832a4af [2022-11-16 20:25:17,712 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/data/b3dd47bde/1d8fb717211b42dd9e44c84308fbed96 [2022-11-16 20:25:17,715 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 20:25:17,716 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 20:25:17,719 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 20:25:17,720 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 20:25:17,728 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 20:25:17,729 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:25:17" (1/1) ... [2022-11-16 20:25:17,731 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5081299 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:25:17, skipping insertion in model container [2022-11-16 20:25:17,732 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:25:17" (1/1) ... [2022-11-16 20:25:17,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 20:25:17,767 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 20:25:17,974 WARN L229 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_2542f927-9740-4401-91d2-51dba7b38a3b/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c[1995,2008] [2022-11-16 20:25:17,979 WARN L229 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_2542f927-9740-4401-91d2-51dba7b38a3b/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c[2364,2377] [2022-11-16 20:25:18,026 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:25:18,034 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 20:25:18,049 WARN L229 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_2542f927-9740-4401-91d2-51dba7b38a3b/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c[1995,2008] [2022-11-16 20:25:18,050 WARN L229 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_2542f927-9740-4401-91d2-51dba7b38a3b/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c[2364,2377] [2022-11-16 20:25:18,087 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:25:18,101 INFO L208 MainTranslator]: Completed translation [2022-11-16 20:25:18,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:25:18 WrapperNode [2022-11-16 20:25:18,102 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 20:25:18,103 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 20:25:18,103 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 20:25:18,104 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 20:25:18,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:25:18" (1/1) ... [2022-11-16 20:25:18,131 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:25:18" (1/1) ... [2022-11-16 20:25:18,156 INFO L138 Inliner]: procedures = 27, calls = 17, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 175 [2022-11-16 20:25:18,157 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 20:25:18,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 20:25:18,158 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 20:25:18,158 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 20:25:18,171 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:25:18" (1/1) ... [2022-11-16 20:25:18,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:25:18" (1/1) ... [2022-11-16 20:25:18,184 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:25:18" (1/1) ... [2022-11-16 20:25:18,185 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:25:18" (1/1) ... [2022-11-16 20:25:18,193 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:25:18" (1/1) ... [2022-11-16 20:25:18,199 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:25:18" (1/1) ... [2022-11-16 20:25:18,201 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:25:18" (1/1) ... [2022-11-16 20:25:18,203 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:25:18" (1/1) ... [2022-11-16 20:25:18,206 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 20:25:18,207 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 20:25:18,207 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 20:25:18,207 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 20:25:18,208 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:25:18" (1/1) ... [2022-11-16 20:25:18,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:25:18,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:25:18,248 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 20:25:18,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 20:25:18,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 20:25:18,318 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-11-16 20:25:18,318 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-11-16 20:25:18,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 20:25:18,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 20:25:18,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 20:25:18,318 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-16 20:25:18,318 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-16 20:25:18,447 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 20:25:18,449 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 20:25:18,891 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 20:25:19,070 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 20:25:19,070 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 20:25:19,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:25:19 BoogieIcfgContainer [2022-11-16 20:25:19,073 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 20:25:19,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 20:25:19,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 20:25:19,097 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 20:25:19,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:25:17" (1/3) ... [2022-11-16 20:25:19,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40d43d9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:25:19, skipping insertion in model container [2022-11-16 20:25:19,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:25:18" (2/3) ... [2022-11-16 20:25:19,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40d43d9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:25:19, skipping insertion in model container [2022-11-16 20:25:19,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:25:19" (3/3) ... [2022-11-16 20:25:19,100 INFO L112 eAbstractionObserver]: Analyzing ICFG square_7+soft_float_3a.c.cil.c [2022-11-16 20:25:19,114 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 20:25:19,114 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-16 20:25:19,162 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 20:25:19,168 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;@7a06a9bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 20:25:19,169 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 20:25:19,173 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) [2022-11-16 20:25:19,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 20:25:19,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:25:19,181 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 20:25:19,182 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:25:19,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:25:19,188 INFO L85 PathProgramCache]: Analyzing trace with hash 9968771, now seen corresponding path program 1 times [2022-11-16 20:25:19,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:25:19,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254018452] [2022-11-16 20:25:19,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:25:19,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:25:19,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 20:25:19,289 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 20:25:19,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 20:25:19,322 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-16 20:25:19,325 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 20:25:19,326 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-11-16 20:25:19,328 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 20:25:19,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 20:25:19,335 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-16 20:25:19,340 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-16 20:25:19,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 08:25:19 BoogieIcfgContainer [2022-11-16 20:25:19,366 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-16 20:25:19,368 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-16 20:25:19,368 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-16 20:25:19,369 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-16 20:25:19,369 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:25:19" (3/4) ... [2022-11-16 20:25:19,372 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-16 20:25:19,372 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-16 20:25:19,374 INFO L158 Benchmark]: Toolchain (without parser) took 1657.04ms. Allocated memory is still 127.9MB. Free memory was 92.0MB in the beginning and 87.9MB in the end (delta: 4.0MB). Peak memory consumption was 4.8MB. Max. memory is 16.1GB. [2022-11-16 20:25:19,376 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 127.9MB. Free memory was 98.8MB in the beginning and 98.8MB in the end (delta: 28.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 20:25:19,376 INFO L158 Benchmark]: CACSL2BoogieTranslator took 383.36ms. Allocated memory is still 127.9MB. Free memory was 91.6MB in the beginning and 98.6MB in the end (delta: -7.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-16 20:25:19,377 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.76ms. Allocated memory is still 127.9MB. Free memory was 98.3MB in the beginning and 96.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 20:25:19,383 INFO L158 Benchmark]: Boogie Preprocessor took 48.07ms. Allocated memory is still 127.9MB. Free memory was 96.2MB in the beginning and 94.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 20:25:19,384 INFO L158 Benchmark]: RCFGBuilder took 866.35ms. Allocated memory is still 127.9MB. Free memory was 94.4MB in the beginning and 52.5MB in the end (delta: 41.9MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. [2022-11-16 20:25:19,385 INFO L158 Benchmark]: TraceAbstraction took 291.17ms. Allocated memory is still 127.9MB. Free memory was 52.2MB in the beginning and 88.6MB in the end (delta: -36.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 20:25:19,385 INFO L158 Benchmark]: Witness Printer took 4.30ms. Allocated memory is still 127.9MB. Free memory is still 87.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 20:25:19,393 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 127.9MB. Free memory was 98.8MB in the beginning and 98.8MB in the end (delta: 28.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 383.36ms. Allocated memory is still 127.9MB. Free memory was 91.6MB in the beginning and 98.6MB in the end (delta: -7.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 53.76ms. Allocated memory is still 127.9MB. Free memory was 98.3MB in the beginning and 96.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 48.07ms. Allocated memory is still 127.9MB. Free memory was 96.2MB in the beginning and 94.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 866.35ms. Allocated memory is still 127.9MB. Free memory was 94.4MB in the beginning and 52.5MB in the end (delta: 41.9MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. * TraceAbstraction took 291.17ms. Allocated memory is still 127.9MB. Free memory was 52.2MB in the beginning and 88.6MB in the end (delta: -36.4MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 4.30ms. Allocated memory is still 127.9MB. Free memory is still 87.9MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 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: 0.2s, 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 [2022-11-16 20:25:19,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0 --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-e04fb08 [2022-11-16 20:25:21,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 20:25:21,825 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 20:25:21,861 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 20:25:21,862 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 20:25:21,866 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 20:25:21,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 20:25:21,873 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 20:25:21,875 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 20:25:21,883 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 20:25:21,884 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 20:25:21,885 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 20:25:21,885 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 20:25:21,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 20:25:21,887 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 20:25:21,888 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 20:25:21,889 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 20:25:21,890 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 20:25:21,891 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 20:25:21,893 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 20:25:21,901 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 20:25:21,903 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 20:25:21,906 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 20:25:21,907 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 20:25:21,921 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 20:25:21,921 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 20:25:21,922 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 20:25:21,923 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 20:25:21,923 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 20:25:21,924 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 20:25:21,924 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 20:25:21,925 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 20:25:21,926 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 20:25:21,927 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 20:25:21,928 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 20:25:21,928 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 20:25:21,929 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 20:25:21,929 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 20:25:21,929 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 20:25:21,930 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 20:25:21,931 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 20:25:21,937 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-16 20:25:21,958 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 20:25:21,959 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 20:25:21,959 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 20:25:21,959 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 20:25:21,960 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 20:25:21,960 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 20:25:21,960 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 20:25:21,961 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 20:25:21,961 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 20:25:21,961 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 20:25:21,961 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 20:25:21,961 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 20:25:21,962 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 20:25:21,962 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 20:25:21,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 20:25:21,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 20:25:21,963 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 20:25:21,963 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 20:25:21,964 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 20:25:21,964 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 20:25:21,964 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-16 20:25:21,964 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-16 20:25:21,964 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 20:25:21,965 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 20:25:21,965 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 20:25:21,965 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 20:25:21,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 20:25:21,966 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 20:25:21,966 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 20:25:21,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:25:21,966 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 20:25:21,966 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 20:25:21,967 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 20:25:21,967 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-16 20:25:21,967 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-16 20:25:21,967 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 20:25:21,967 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 20:25:21,968 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-16 20:25:21,968 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_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf0fb52bead8e180875472b49ad053a30663ea61c3025c1e008ec598b0fa4db0 [2022-11-16 20:25:22,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 20:25:22,382 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 20:25:22,387 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 20:25:22,389 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 20:25:22,391 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 20:25:22,393 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c [2022-11-16 20:25:22,465 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/data/2eff092da/de9074535ed245fc93a0b0d9a1800ddd/FLAG1245b8a51 [2022-11-16 20:25:23,043 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 20:25:23,044 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c [2022-11-16 20:25:23,058 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/data/2eff092da/de9074535ed245fc93a0b0d9a1800ddd/FLAG1245b8a51 [2022-11-16 20:25:23,398 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/data/2eff092da/de9074535ed245fc93a0b0d9a1800ddd [2022-11-16 20:25:23,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 20:25:23,403 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 20:25:23,404 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 20:25:23,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 20:25:23,410 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 20:25:23,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:25:23" (1/1) ... [2022-11-16 20:25:23,412 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a838b9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:25:23, skipping insertion in model container [2022-11-16 20:25:23,412 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:25:23" (1/1) ... [2022-11-16 20:25:23,426 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 20:25:23,481 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 20:25:23,677 WARN L229 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_2542f927-9740-4401-91d2-51dba7b38a3b/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c[1995,2008] [2022-11-16 20:25:23,683 WARN L229 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_2542f927-9740-4401-91d2-51dba7b38a3b/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c[2364,2377] [2022-11-16 20:25:23,743 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:25:23,756 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 20:25:23,774 WARN L229 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_2542f927-9740-4401-91d2-51dba7b38a3b/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c[1995,2008] [2022-11-16 20:25:23,775 WARN L229 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_2542f927-9740-4401-91d2-51dba7b38a3b/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c[2364,2377] [2022-11-16 20:25:23,811 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:25:23,841 INFO L208 MainTranslator]: Completed translation [2022-11-16 20:25:23,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:25:23 WrapperNode [2022-11-16 20:25:23,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 20:25:23,843 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 20:25:23,843 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 20:25:23,843 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 20:25:23,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:25:23" (1/1) ... [2022-11-16 20:25:23,863 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:25:23" (1/1) ... [2022-11-16 20:25:23,887 INFO L138 Inliner]: procedures = 28, calls = 17, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 129 [2022-11-16 20:25:23,887 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 20:25:23,888 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 20:25:23,888 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 20:25:23,888 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 20:25:23,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:25:23" (1/1) ... [2022-11-16 20:25:23,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:25:23" (1/1) ... [2022-11-16 20:25:23,902 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:25:23" (1/1) ... [2022-11-16 20:25:23,905 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:25:23" (1/1) ... [2022-11-16 20:25:23,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:25:23" (1/1) ... [2022-11-16 20:25:23,934 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:25:23" (1/1) ... [2022-11-16 20:25:23,944 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:25:23" (1/1) ... [2022-11-16 20:25:23,945 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:25:23" (1/1) ... [2022-11-16 20:25:23,948 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 20:25:23,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 20:25:23,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 20:25:23,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 20:25:23,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:25:23" (1/1) ... [2022-11-16 20:25:23,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:25:23,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:25:23,990 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 20:25:23,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 20:25:24,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 20:25:24,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-16 20:25:24,027 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-11-16 20:25:24,027 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-11-16 20:25:24,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 20:25:24,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 20:25:24,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-16 20:25:24,027 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-16 20:25:24,113 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 20:25:24,116 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 20:25:26,745 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 20:25:26,753 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 20:25:26,754 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 20:25:26,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:25:26 BoogieIcfgContainer [2022-11-16 20:25:26,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 20:25:26,759 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 20:25:26,759 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 20:25:26,763 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 20:25:26,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:25:23" (1/3) ... [2022-11-16 20:25:26,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e48d2cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:25:26, skipping insertion in model container [2022-11-16 20:25:26,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:25:23" (2/3) ... [2022-11-16 20:25:26,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e48d2cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:25:26, skipping insertion in model container [2022-11-16 20:25:26,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:25:26" (3/3) ... [2022-11-16 20:25:26,775 INFO L112 eAbstractionObserver]: Analyzing ICFG square_7+soft_float_3a.c.cil.c [2022-11-16 20:25:26,797 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 20:25:26,797 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-16 20:25:26,850 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 20:25:26,858 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;@616a3dcb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 20:25:26,858 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 20:25:26,863 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) [2022-11-16 20:25:26,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 20:25:26,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:25:26,872 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:25:26,873 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:25:26,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:25:26,879 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2022-11-16 20:25:26,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:25:26,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [840164247] [2022-11-16 20:25:26,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:25:26,891 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 [2022-11-16 20:25:26,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:25:26,893 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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) [2022-11-16 20:25:26,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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 [2022-11-16 20:25:27,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:25:27,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-16 20:25:27,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:25:27,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:25:27,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:25:27,567 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:25:27,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [840164247] [2022-11-16 20:25:27,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [840164247] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:25:27,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:25:27,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 20:25:27,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973382633] [2022-11-16 20:25:27,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:25:27,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 20:25:27,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:25:27,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 20:25:27,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 20:25:27,613 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) [2022-11-16 20:25:27,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:25:27,648 INFO L93 Difference]: Finished difference Result 115 states and 173 transitions. [2022-11-16 20:25:27,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 20:25:27,650 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 [2022-11-16 20:25:27,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:25:27,658 INFO L225 Difference]: With dead ends: 115 [2022-11-16 20:25:27,659 INFO L226 Difference]: Without dead ends: 51 [2022-11-16 20:25:27,662 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 [2022-11-16 20:25:27,666 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 [2022-11-16 20:25:27,667 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] [2022-11-16 20:25:27,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-16 20:25:27,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-11-16 20:25:27,712 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) [2022-11-16 20:25:27,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2022-11-16 20:25:27,729 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 7 [2022-11-16 20:25:27,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:25:27,730 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2022-11-16 20:25:27,731 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) [2022-11-16 20:25:27,731 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2022-11-16 20:25:27,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 20:25:27,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:25:27,732 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:25:27,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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)] Ended with exit code 0 [2022-11-16 20:25:27,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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 [2022-11-16 20:25:27,946 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:25:27,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:25:27,947 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2022-11-16 20:25:27,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:25:27,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1953823797] [2022-11-16 20:25:27,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:25:27,950 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 [2022-11-16 20:25:27,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:25:27,951 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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) [2022-11-16 20:25:27,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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 [2022-11-16 20:29:30,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:29:31,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 20:29:31,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:29:46,606 WARN L833 $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 [2022-11-16 20:30:20,541 WARN L833 $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 [2022-11-16 20:30:22,589 WARN L855 $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 [2022-11-16 20:30:22,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:30:22,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:30:22,590 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:30:22,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1953823797] [2022-11-16 20:30:22,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1953823797] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:30:22,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:30:22,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 20:30:22,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161173039] [2022-11-16 20:30:22,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:30:22,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 20:30:22,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:30:22,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 20:30:22,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2022-11-16 20:30:22,594 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) [2022-11-16 20:30:25,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 20:30:25,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:30:25,403 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2022-11-16 20:30:25,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 20:30:25,404 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 [2022-11-16 20:30:25,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:30:25,405 INFO L225 Difference]: With dead ends: 51 [2022-11-16 20:30:25,406 INFO L226 Difference]: Without dead ends: 46 [2022-11-16 20:30:25,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=18, Invalid=17, Unknown=3, NotChecked=18, Total=56 [2022-11-16 20:30:25,408 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 65 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-16 20:30:25,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 175 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 1 Unknown, 135 Unchecked, 2.6s Time] [2022-11-16 20:30:25,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-16 20:30:25,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-11-16 20:30:25,417 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) [2022-11-16 20:30:25,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 65 transitions. [2022-11-16 20:30:25,419 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 65 transitions. Word has length 7 [2022-11-16 20:30:25,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:30:25,419 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 65 transitions. [2022-11-16 20:30:25,420 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) [2022-11-16 20:30:25,420 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 65 transitions. [2022-11-16 20:30:25,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-16 20:30:25,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:30:25,422 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] [2022-11-16 20:30:25,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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)] Forceful destruction successful, exit code 0 [2022-11-16 20:30:25,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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 [2022-11-16 20:30:25,646 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:30:25,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:30:25,647 INFO L85 PathProgramCache]: Analyzing trace with hash 220430878, now seen corresponding path program 1 times [2022-11-16 20:30:25,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:30:25,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [839871953] [2022-11-16 20:30:25,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:25,649 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 [2022-11-16 20:30:25,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:30:25,655 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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) [2022-11-16 20:30:25,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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 [2022-11-16 20:30:25,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:25,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 20:30:25,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:30:26,040 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:30:26,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:30:26,041 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:30:26,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [839871953] [2022-11-16 20:30:26,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [839871953] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:30:26,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:30:26,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:30:26,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589469719] [2022-11-16 20:30:26,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:30:26,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:30:26,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:30:26,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:30:26,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:30:26,045 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) [2022-11-16 20:30:26,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:30:26,529 INFO L93 Difference]: Finished difference Result 102 states and 148 transitions. [2022-11-16 20:30:26,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 20:30:26,530 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 [2022-11-16 20:30:26,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:30:26,533 INFO L225 Difference]: With dead ends: 102 [2022-11-16 20:30:26,534 INFO L226 Difference]: Without dead ends: 60 [2022-11-16 20:30:26,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:30:26,536 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 16 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 20:30:26,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 143 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 20:30:26,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-16 20:30:26,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 51. [2022-11-16 20:30:26,552 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) [2022-11-16 20:30:26,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 71 transitions. [2022-11-16 20:30:26,553 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 71 transitions. Word has length 42 [2022-11-16 20:30:26,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:30:26,554 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 71 transitions. [2022-11-16 20:30:26,554 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) [2022-11-16 20:30:26,554 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 71 transitions. [2022-11-16 20:30:26,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-16 20:30:26,556 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:30:26,556 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] [2022-11-16 20:30:26,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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)] Forceful destruction successful, exit code 0 [2022-11-16 20:30:26,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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 [2022-11-16 20:30:26,757 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:30:26,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:30:26,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1744233432, now seen corresponding path program 1 times [2022-11-16 20:30:26,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:30:26,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [256211830] [2022-11-16 20:30:26,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:26,760 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 [2022-11-16 20:30:26,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:30:26,761 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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) [2022-11-16 20:30:26,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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 [2022-11-16 20:30:26,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:26,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 20:30:26,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:30:27,125 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:30:27,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:30:27,130 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:30:27,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [256211830] [2022-11-16 20:30:27,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [256211830] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:30:27,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:30:27,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:30:27,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656385083] [2022-11-16 20:30:27,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:30:27,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:30:27,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:30:27,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:30:27,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:30:27,144 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) [2022-11-16 20:30:27,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:30:27,558 INFO L93 Difference]: Finished difference Result 106 states and 151 transitions. [2022-11-16 20:30:27,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:30:27,559 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 [2022-11-16 20:30:27,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:30:27,561 INFO L225 Difference]: With dead ends: 106 [2022-11-16 20:30:27,561 INFO L226 Difference]: Without dead ends: 63 [2022-11-16 20:30:27,562 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 [2022-11-16 20:30:27,563 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 10 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:30:27,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 157 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 20:30:27,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-16 20:30:27,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2022-11-16 20:30:27,576 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) [2022-11-16 20:30:27,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 78 transitions. [2022-11-16 20:30:27,578 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 78 transitions. Word has length 45 [2022-11-16 20:30:27,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:30:27,578 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 78 transitions. [2022-11-16 20:30:27,579 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) [2022-11-16 20:30:27,579 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 78 transitions. [2022-11-16 20:30:27,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-16 20:30:27,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:30:27,581 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] [2022-11-16 20:30:27,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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)] Forceful destruction successful, exit code 0 [2022-11-16 20:30:27,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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 [2022-11-16 20:30:27,807 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:30:27,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:30:27,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1089123319, now seen corresponding path program 1 times [2022-11-16 20:30:27,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:30:27,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [291612090] [2022-11-16 20:30:27,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:27,809 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 [2022-11-16 20:30:27,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:30:27,816 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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) [2022-11-16 20:30:27,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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 [2022-11-16 20:30:27,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:27,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 20:30:27,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:30:28,120 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:30:28,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:30:28,121 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:30:28,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [291612090] [2022-11-16 20:30:28,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [291612090] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:30:28,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:30:28,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:30:28,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763671900] [2022-11-16 20:30:28,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:30:28,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:30:28,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:30:28,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:30:28,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:30:28,137 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) [2022-11-16 20:30:28,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:30:28,595 INFO L93 Difference]: Finished difference Result 115 states and 163 transitions. [2022-11-16 20:30:28,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 20:30:28,596 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 [2022-11-16 20:30:28,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:30:28,596 INFO L225 Difference]: With dead ends: 115 [2022-11-16 20:30:28,597 INFO L226 Difference]: Without dead ends: 67 [2022-11-16 20:30:28,597 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 [2022-11-16 20:30:28,598 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 17 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 20:30:28,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 150 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 20:30:28,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-16 20:30:28,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2022-11-16 20:30:28,607 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) [2022-11-16 20:30:28,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2022-11-16 20:30:28,609 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 46 [2022-11-16 20:30:28,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:30:28,610 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2022-11-16 20:30:28,610 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) [2022-11-16 20:30:28,610 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2022-11-16 20:30:28,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-16 20:30:28,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:30:28,612 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] [2022-11-16 20:30:28,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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)] Forceful destruction successful, exit code 0 [2022-11-16 20:30:28,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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 [2022-11-16 20:30:28,835 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:30:28,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:30:28,835 INFO L85 PathProgramCache]: Analyzing trace with hash 957340839, now seen corresponding path program 1 times [2022-11-16 20:30:28,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:30:28,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1037098957] [2022-11-16 20:30:28,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:28,837 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 [2022-11-16 20:30:28,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:30:28,838 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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) [2022-11-16 20:30:28,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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 [2022-11-16 20:30:28,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:28,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 20:30:28,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:30:29,234 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:30:29,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:30:29,235 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:30:29,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1037098957] [2022-11-16 20:30:29,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1037098957] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:30:29,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:30:29,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 20:30:29,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936738599] [2022-11-16 20:30:29,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:30:29,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:30:29,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:30:29,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:30:29,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:30:29,238 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) [2022-11-16 20:30:30,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:30:30,023 INFO L93 Difference]: Finished difference Result 123 states and 174 transitions. [2022-11-16 20:30:30,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 20:30:30,024 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 [2022-11-16 20:30:30,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:30:30,026 INFO L225 Difference]: With dead ends: 123 [2022-11-16 20:30:30,026 INFO L226 Difference]: Without dead ends: 74 [2022-11-16 20:30:30,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 20:30:30,027 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 19 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 20:30:30,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 198 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 20:30:30,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-16 20:30:30,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 58. [2022-11-16 20:30:30,040 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) [2022-11-16 20:30:30,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 81 transitions. [2022-11-16 20:30:30,041 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 81 transitions. Word has length 47 [2022-11-16 20:30:30,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:30:30,042 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 81 transitions. [2022-11-16 20:30:30,042 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) [2022-11-16 20:30:30,043 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 81 transitions. [2022-11-16 20:30:30,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-16 20:30:30,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:30:30,045 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] [2022-11-16 20:30:30,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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)] Forceful destruction successful, exit code 0 [2022-11-16 20:30:30,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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 [2022-11-16 20:30:30,258 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:30:30,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:30:30,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1066513524, now seen corresponding path program 1 times [2022-11-16 20:30:30,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:30:30,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1238171227] [2022-11-16 20:30:30,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:30,259 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 [2022-11-16 20:30:30,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:30:30,261 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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) [2022-11-16 20:30:30,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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 [2022-11-16 20:30:30,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:30,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 20:30:30,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:30:30,618 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:30:30,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:30:31,400 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 20:30:31,401 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:30:31,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1238171227] [2022-11-16 20:30:31,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1238171227] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:30:31,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1107492493] [2022-11-16 20:30:31,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:31,402 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:30:31,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:30:31,413 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:30:31,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-16 20:30:31,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:31,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 20:30:31,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:30:31,635 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 20:30:31,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:30:31,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1107492493] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:30:31,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:30:31,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-11-16 20:30:31,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821854533] [2022-11-16 20:30:31,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:30:31,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:30:31,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:30:31,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:30:31,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-16 20:30:31,638 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) [2022-11-16 20:30:31,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:30:31,671 INFO L93 Difference]: Finished difference Result 67 states and 91 transitions. [2022-11-16 20:30:31,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:30:31,672 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 [2022-11-16 20:30:31,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:30:31,673 INFO L225 Difference]: With dead ends: 67 [2022-11-16 20:30:31,674 INFO L226 Difference]: Without dead ends: 58 [2022-11-16 20:30:31,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-16 20:30:31,675 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 [2022-11-16 20:30:31,676 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] [2022-11-16 20:30:31,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-16 20:30:31,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-11-16 20:30:31,685 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) [2022-11-16 20:30:31,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 80 transitions. [2022-11-16 20:30:31,687 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 80 transitions. Word has length 48 [2022-11-16 20:30:31,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:30:31,687 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 80 transitions. [2022-11-16 20:30:31,688 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) [2022-11-16 20:30:31,688 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 80 transitions. [2022-11-16 20:30:31,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-16 20:30:31,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:30:31,690 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] [2022-11-16 20:30:31,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-16 20:30:31,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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)] Forceful destruction successful, exit code 0 [2022-11-16 20:30:32,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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 [2022-11-16 20:30:32,094 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:30:32,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:30:32,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1967363502, now seen corresponding path program 1 times [2022-11-16 20:30:32,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:30:32,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063784527] [2022-11-16 20:30:32,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:32,096 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 [2022-11-16 20:30:32,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:30:32,097 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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) [2022-11-16 20:30:32,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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 [2022-11-16 20:30:32,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:32,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 20:30:32,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:30:32,512 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:30:32,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:30:33,249 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 20:30:33,249 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:30:33,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063784527] [2022-11-16 20:30:33,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2063784527] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:30:33,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1835176923] [2022-11-16 20:30:33,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:33,250 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:30:33,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:30:33,252 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:30:33,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-16 20:30:33,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:33,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 20:30:33,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:30:33,576 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 20:30:33,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:30:33,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1835176923] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:30:33,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:30:33,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 10 [2022-11-16 20:30:33,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243958310] [2022-11-16 20:30:33,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:30:33,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:30:33,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:30:33,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:30:33,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-16 20:30:33,579 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) [2022-11-16 20:30:33,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:30:33,749 INFO L93 Difference]: Finished difference Result 68 states and 91 transitions. [2022-11-16 20:30:33,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:30:33,750 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 [2022-11-16 20:30:33,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:30:33,751 INFO L225 Difference]: With dead ends: 68 [2022-11-16 20:30:33,751 INFO L226 Difference]: Without dead ends: 58 [2022-11-16 20:30:33,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-16 20:30:33,752 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 1 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:30:33,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 184 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:30:33,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-16 20:30:33,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-11-16 20:30:33,762 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) [2022-11-16 20:30:33,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 79 transitions. [2022-11-16 20:30:33,764 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 79 transitions. Word has length 50 [2022-11-16 20:30:33,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:30:33,764 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 79 transitions. [2022-11-16 20:30:33,765 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) [2022-11-16 20:30:33,765 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 79 transitions. [2022-11-16 20:30:33,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-16 20:30:33,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:30:33,767 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] [2022-11-16 20:30:33,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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)] Forceful destruction successful, exit code 0 [2022-11-16 20:30:33,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-16 20:30:34,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 20:30:34,184 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:30:34,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:30:34,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1518257168, now seen corresponding path program 1 times [2022-11-16 20:30:34,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:30:34,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1566875582] [2022-11-16 20:30:34,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:34,186 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 [2022-11-16 20:30:34,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:30:34,187 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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) [2022-11-16 20:30:34,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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 [2022-11-16 20:30:34,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:34,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 20:30:34,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:30:34,561 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:30:34,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:30:35,289 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 20:30:35,289 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:30:35,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1566875582] [2022-11-16 20:30:35,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1566875582] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:30:35,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1969486807] [2022-11-16 20:30:35,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:35,290 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:30:35,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:30:35,291 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:30:35,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-16 20:30:35,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:35,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 20:30:35,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:30:35,918 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-16 20:30:35,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:30:35,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1969486807] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:30:35,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:30:35,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 5] total 12 [2022-11-16 20:30:35,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158322478] [2022-11-16 20:30:35,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:30:35,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 20:30:35,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:30:35,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 20:30:35,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-16 20:30:35,921 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) [2022-11-16 20:30:36,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:30:36,293 INFO L93 Difference]: Finished difference Result 98 states and 133 transitions. [2022-11-16 20:30:36,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 20:30:36,294 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 [2022-11-16 20:30:36,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:30:36,295 INFO L225 Difference]: With dead ends: 98 [2022-11-16 20:30:36,295 INFO L226 Difference]: Without dead ends: 77 [2022-11-16 20:30:36,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-16 20:30:36,297 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 [2022-11-16 20:30:36,297 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] [2022-11-16 20:30:36,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-16 20:30:36,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2022-11-16 20:30:36,308 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) [2022-11-16 20:30:36,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2022-11-16 20:30:36,310 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 50 [2022-11-16 20:30:36,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:30:36,310 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2022-11-16 20:30:36,311 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) [2022-11-16 20:30:36,311 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2022-11-16 20:30:36,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-16 20:30:36,312 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:30:36,313 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] [2022-11-16 20:30:36,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-16 20:30:36,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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 [2022-11-16 20:30:36,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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 [2022-11-16 20:30:36,716 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:30:36,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:30:36,716 INFO L85 PathProgramCache]: Analyzing trace with hash 931451154, now seen corresponding path program 1 times [2022-11-16 20:30:36,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:30:36,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [250890966] [2022-11-16 20:30:36,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:36,716 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 [2022-11-16 20:30:36,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:30:36,717 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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) [2022-11-16 20:30:36,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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 [2022-11-16 20:30:36,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:36,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 20:30:36,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:30:37,107 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:30:37,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:30:37,817 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 20:30:37,818 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:30:37,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [250890966] [2022-11-16 20:30:37,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [250890966] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:30:37,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [580503555] [2022-11-16 20:30:37,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:37,818 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:30:37,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:30:37,821 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:30:37,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-16 20:30:37,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:37,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 20:30:37,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:30:38,597 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-16 20:30:38,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:30:39,017 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-16 20:30:39,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [580503555] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:30:39,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498032474] [2022-11-16 20:30:39,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:39,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:30:39,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:30:39,019 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:30:39,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 20:30:39,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:39,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 20:30:39,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:30:39,268 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:30:39,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:30:39,755 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 20:30:39,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498032474] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:30:39,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 20:30:39,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 5, 5] total 12 [2022-11-16 20:30:39,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413927230] [2022-11-16 20:30:39,756 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 20:30:39,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 20:30:39,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:30:39,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 20:30:39,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-16 20:30:39,757 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) [2022-11-16 20:30:42,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:30:42,564 INFO L93 Difference]: Finished difference Result 186 states and 270 transitions. [2022-11-16 20:30:42,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 20:30:42,566 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 [2022-11-16 20:30:42,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:30:42,568 INFO L225 Difference]: With dead ends: 186 [2022-11-16 20:30:42,568 INFO L226 Difference]: Without dead ends: 127 [2022-11-16 20:30:42,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2022-11-16 20:30:42,570 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 91 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 20:30:42,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 374 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-16 20:30:42,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-16 20:30:42,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 96. [2022-11-16 20:30:42,589 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) [2022-11-16 20:30:42,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 137 transitions. [2022-11-16 20:30:42,591 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 137 transitions. Word has length 50 [2022-11-16 20:30:42,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:30:42,592 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 137 transitions. [2022-11-16 20:30:42,592 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) [2022-11-16 20:30:42,592 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 137 transitions. [2022-11-16 20:30:42,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-16 20:30:42,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:30:42,594 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] [2022-11-16 20:30:42,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 20:30:42,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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 [2022-11-16 20:30:43,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-16 20:30:43,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 20:30:43,206 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:30:43,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:30:43,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1265138967, now seen corresponding path program 1 times [2022-11-16 20:30:43,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:30:43,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [814947904] [2022-11-16 20:30:43,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:43,208 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 [2022-11-16 20:30:43,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:30:43,209 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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) [2022-11-16 20:30:43,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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 [2022-11-16 20:30:43,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:43,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 20:30:43,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:30:43,654 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:30:43,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:30:44,414 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 20:30:44,414 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:30:44,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [814947904] [2022-11-16 20:30:44,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [814947904] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:30:44,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1136110333] [2022-11-16 20:30:44,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:44,415 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:30:44,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:30:44,417 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:30:44,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-16 20:30:44,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:44,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 20:30:44,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:30:44,974 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-16 20:30:44,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:30:44,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1136110333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:30:44,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:30:44,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2022-11-16 20:30:44,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631381597] [2022-11-16 20:30:44,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:30:44,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:30:44,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:30:44,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:30:44,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-16 20:30:44,977 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) [2022-11-16 20:30:45,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:30:45,314 INFO L93 Difference]: Finished difference Result 119 states and 161 transitions. [2022-11-16 20:30:45,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 20:30:45,316 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 [2022-11-16 20:30:45,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:30:45,317 INFO L225 Difference]: With dead ends: 119 [2022-11-16 20:30:45,317 INFO L226 Difference]: Without dead ends: 113 [2022-11-16 20:30:45,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-16 20:30:45,319 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 [2022-11-16 20:30:45,319 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] [2022-11-16 20:30:45,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-16 20:30:45,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2022-11-16 20:30:45,335 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) [2022-11-16 20:30:45,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 153 transitions. [2022-11-16 20:30:45,337 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 153 transitions. Word has length 54 [2022-11-16 20:30:45,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:30:45,337 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 153 transitions. [2022-11-16 20:30:45,338 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) [2022-11-16 20:30:45,338 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 153 transitions. [2022-11-16 20:30:45,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-16 20:30:45,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:30:45,339 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] [2022-11-16 20:30:45,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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 [2022-11-16 20:30:45,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-16 20:30:45,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 20:30:45,754 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:30:45,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:30:45,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1322397269, now seen corresponding path program 1 times [2022-11-16 20:30:45,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:30:45,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1340225458] [2022-11-16 20:30:45,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:45,755 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 [2022-11-16 20:30:45,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:30:45,756 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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) [2022-11-16 20:30:45,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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 [2022-11-16 20:30:45,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:45,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 20:30:45,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:30:46,242 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:30:46,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:30:47,050 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 20:30:47,051 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:30:47,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1340225458] [2022-11-16 20:30:47,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1340225458] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:30:47,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [693942586] [2022-11-16 20:30:47,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:47,051 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:30:47,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:30:47,053 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:30:47,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-16 20:30:47,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:47,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 20:30:47,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:30:47,390 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:30:47,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:30:47,828 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 20:30:47,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [693942586] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:30:47,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976969788] [2022-11-16 20:30:47,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:47,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:30:47,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:30:47,830 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:30:47,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 20:30:47,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:47,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 20:30:47,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:30:48,747 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 20:30:48,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:30:49,195 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-16 20:30:49,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976969788] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 20:30:49,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2022-11-16 20:30:49,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6, 6, 6, 8] total 17 [2022-11-16 20:30:49,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520154364] [2022-11-16 20:30:49,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:30:49,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 20:30:49,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:30:49,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 20:30:49,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-16 20:30:49,200 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) [2022-11-16 20:30:49,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:30:49,578 INFO L93 Difference]: Finished difference Result 117 states and 158 transitions. [2022-11-16 20:30:49,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 20:30:49,579 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 [2022-11-16 20:30:49,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:30:49,581 INFO L225 Difference]: With dead ends: 117 [2022-11-16 20:30:49,581 INFO L226 Difference]: Without dead ends: 100 [2022-11-16 20:30:49,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-11-16 20:30:49,582 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 [2022-11-16 20:30:49,583 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] [2022-11-16 20:30:49,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-16 20:30:49,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-11-16 20:30:49,611 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) [2022-11-16 20:30:49,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 135 transitions. [2022-11-16 20:30:49,614 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 135 transitions. Word has length 54 [2022-11-16 20:30:49,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:30:49,614 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 135 transitions. [2022-11-16 20:30:49,615 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) [2022-11-16 20:30:49,615 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 135 transitions. [2022-11-16 20:30:49,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-16 20:30:49,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:30:49,617 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] [2022-11-16 20:30:49,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-11-16 20:30:49,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-16 20:30:50,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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)] Forceful destruction successful, exit code 0 [2022-11-16 20:30:50,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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 [2022-11-16 20:30:50,221 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:30:50,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:30:50,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1182884870, now seen corresponding path program 1 times [2022-11-16 20:30:50,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:30:50,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [809038656] [2022-11-16 20:30:50,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:50,222 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 [2022-11-16 20:30:50,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:30:50,223 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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) [2022-11-16 20:30:50,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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 [2022-11-16 20:30:50,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:50,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 20:30:50,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:30:50,608 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:30:50,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:30:51,332 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 20:30:51,332 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:30:51,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [809038656] [2022-11-16 20:30:51,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [809038656] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:30:51,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [570535355] [2022-11-16 20:30:51,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:51,333 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:30:51,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:30:51,335 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:30:51,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-16 20:30:51,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:51,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 20:30:51,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:30:51,642 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:30:51,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:30:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 20:30:52,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [570535355] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:30:52,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4602134] [2022-11-16 20:30:52,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:52,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:30:52,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:30:52,058 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:30:52,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-16 20:30:52,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:52,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 20:30:52,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:30:52,685 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:30:52,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:30:53,405 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 20:30:53,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4602134] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:30:53,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 20:30:53,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 7, 7] total 15 [2022-11-16 20:30:53,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792566856] [2022-11-16 20:30:53,406 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 20:30:53,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 20:30:53,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:30:53,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 20:30:53,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-11-16 20:30:53,409 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) [2022-11-16 20:30:55,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:30:55,387 INFO L93 Difference]: Finished difference Result 224 states and 309 transitions. [2022-11-16 20:30:55,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 20:30:55,389 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 [2022-11-16 20:30:55,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:30:55,390 INFO L225 Difference]: With dead ends: 224 [2022-11-16 20:30:55,391 INFO L226 Difference]: Without dead ends: 132 [2022-11-16 20:30:55,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2022-11-16 20:30:55,392 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 175 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:30:55,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 294 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-16 20:30:55,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-16 20:30:55,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 104. [2022-11-16 20:30:55,414 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) [2022-11-16 20:30:55,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 142 transitions. [2022-11-16 20:30:55,418 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 142 transitions. Word has length 56 [2022-11-16 20:30:55,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:30:55,419 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 142 transitions. [2022-11-16 20:30:55,420 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) [2022-11-16 20:30:55,420 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 142 transitions. [2022-11-16 20:30:55,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-16 20:30:55,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:30:55,421 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] [2022-11-16 20:30:55,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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)] Forceful destruction successful, exit code 0 [2022-11-16 20:30:55,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-11-16 20:30:55,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-11-16 20:30:56,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:30:56,037 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:30:56,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:30:56,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1175617949, now seen corresponding path program 1 times [2022-11-16 20:30:56,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:30:56,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1399127042] [2022-11-16 20:30:56,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:56,039 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 [2022-11-16 20:30:56,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:30:56,040 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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) [2022-11-16 20:30:56,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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 [2022-11-16 20:30:56,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:56,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 20:30:56,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:30:56,704 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:30:56,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:30:58,201 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 20:30:58,201 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:30:58,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1399127042] [2022-11-16 20:30:58,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1399127042] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:30:58,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1058641023] [2022-11-16 20:30:58,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:58,201 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:30:58,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:30:58,203 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:30:58,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-16 20:30:58,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:58,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 20:30:58,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:30:58,569 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:30:58,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:30:59,244 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 20:30:59,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1058641023] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:30:59,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34554018] [2022-11-16 20:30:59,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:30:59,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:30:59,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:30:59,246 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:30:59,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-16 20:30:59,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:30:59,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 20:30:59,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:30:59,995 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:30:59,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:31:01,823 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 20:31:01,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34554018] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:31:01,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 20:31:01,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2022-11-16 20:31:01,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75735651] [2022-11-16 20:31:01,824 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 20:31:01,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 20:31:01,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:31:01,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 20:31:01,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2022-11-16 20:31:01,827 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) [2022-11-16 20:31:06,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:31:06,780 INFO L93 Difference]: Finished difference Result 271 states and 386 transitions. [2022-11-16 20:31:06,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 20:31:06,781 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 [2022-11-16 20:31:06,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:31:06,783 INFO L225 Difference]: With dead ends: 271 [2022-11-16 20:31:06,784 INFO L226 Difference]: Without dead ends: 175 [2022-11-16 20:31:06,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=316, Invalid=554, Unknown=0, NotChecked=0, Total=870 [2022-11-16 20:31:06,786 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 233 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-16 20:31:06,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 615 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-16 20:31:06,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-16 20:31:06,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 118. [2022-11-16 20:31:06,808 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) [2022-11-16 20:31:06,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 165 transitions. [2022-11-16 20:31:06,809 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 165 transitions. Word has length 63 [2022-11-16 20:31:06,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:31:06,810 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 165 transitions. [2022-11-16 20:31:06,810 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) [2022-11-16 20:31:06,810 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 165 transitions. [2022-11-16 20:31:06,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-16 20:31:06,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:31:06,812 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] [2022-11-16 20:31:06,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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)] Forceful destruction successful, exit code 0 [2022-11-16 20:31:07,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2022-11-16 20:31:07,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-16 20:31:07,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:31:07,426 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:31:07,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:31:07,427 INFO L85 PathProgramCache]: Analyzing trace with hash 369916166, now seen corresponding path program 2 times [2022-11-16 20:31:07,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:31:07,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1181244725] [2022-11-16 20:31:07,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 20:31:07,427 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 [2022-11-16 20:31:07,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:31:07,428 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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) [2022-11-16 20:31:07,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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 [2022-11-16 20:31:07,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 20:31:07,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:31:07,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 20:31:07,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:31:08,361 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:31:08,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:31:10,174 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 20:31:10,175 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:31:10,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1181244725] [2022-11-16 20:31:10,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1181244725] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:31:10,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [927566116] [2022-11-16 20:31:10,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 20:31:10,176 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:31:10,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:31:10,177 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:31:10,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-16 20:31:10,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 20:31:10,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:31:10,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 20:31:10,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:31:10,609 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:31:10,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:31:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 20:31:11,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [927566116] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:31:11,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329199507] [2022-11-16 20:31:11,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 20:31:11,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:31:11,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:31:11,437 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:31:11,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-16 20:31:11,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 20:31:11,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:31:11,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 20:31:11,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:31:12,312 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:31:12,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:31:14,415 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 20:31:14,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329199507] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:31:14,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 20:31:14,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 27 [2022-11-16 20:31:14,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861616703] [2022-11-16 20:31:14,417 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 20:31:14,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 20:31:14,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:31:14,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 20:31:14,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=469, Unknown=0, NotChecked=0, Total=702 [2022-11-16 20:31:14,419 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) [2022-11-16 20:31:20,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:31:20,031 INFO L93 Difference]: Finished difference Result 294 states and 417 transitions. [2022-11-16 20:31:20,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 20:31:20,032 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 [2022-11-16 20:31:20,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:31:20,034 INFO L225 Difference]: With dead ends: 294 [2022-11-16 20:31:20,034 INFO L226 Difference]: Without dead ends: 184 [2022-11-16 20:31:20,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=581, Invalid=1059, Unknown=0, NotChecked=0, Total=1640 [2022-11-16 20:31:20,037 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 503 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:31:20,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 726 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-16 20:31:20,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-16 20:31:20,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 128. [2022-11-16 20:31:20,078 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) [2022-11-16 20:31:20,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 182 transitions. [2022-11-16 20:31:20,080 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 182 transitions. Word has length 68 [2022-11-16 20:31:20,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:31:20,081 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 182 transitions. [2022-11-16 20:31:20,081 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) [2022-11-16 20:31:20,081 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 182 transitions. [2022-11-16 20:31:20,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-16 20:31:20,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:31:20,083 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] [2022-11-16 20:31:20,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2022-11-16 20:31:20,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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)] Ended with exit code 0 [2022-11-16 20:31:20,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-11-16 20:31:20,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:31:20,687 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:31:20,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:31:20,687 INFO L85 PathProgramCache]: Analyzing trace with hash -542294301, now seen corresponding path program 2 times [2022-11-16 20:31:20,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:31:20,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1051297915] [2022-11-16 20:31:20,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 20:31:20,688 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 [2022-11-16 20:31:20,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:31:20,689 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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) [2022-11-16 20:31:20,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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 [2022-11-16 20:31:20,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 20:31:20,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:31:20,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 20:31:20,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:31:22,499 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:31:22,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:31:26,495 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 20:31:26,495 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:31:26,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1051297915] [2022-11-16 20:31:26,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1051297915] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:31:26,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1770370619] [2022-11-16 20:31:26,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 20:31:26,496 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:31:26,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:31:26,497 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:31:26,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-16 20:31:26,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 20:31:26,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:31:26,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 20:31:26,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:31:27,144 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:31:27,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:31:28,419 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 20:31:28,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1770370619] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:31:28,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697361473] [2022-11-16 20:31:28,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 20:31:28,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:31:28,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:31:28,421 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:31:28,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-16 20:31:28,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 20:31:28,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:31:28,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 20:31:28,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:31:29,634 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:31:29,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:31:35,396 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 20:31:35,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697361473] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:31:35,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 20:31:35,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 14, 14] total 38 [2022-11-16 20:31:35,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875491960] [2022-11-16 20:31:35,397 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 20:31:35,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-16 20:31:35,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:31:35,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-16 20:31:35,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=959, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 20:31:35,400 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) [2022-11-16 20:31:53,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:31:53,589 INFO L93 Difference]: Finished difference Result 397 states and 586 transitions. [2022-11-16 20:31:53,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-16 20:31:53,591 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 [2022-11-16 20:31:53,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:31:53,594 INFO L225 Difference]: With dead ends: 397 [2022-11-16 20:31:53,594 INFO L226 Difference]: Without dead ends: 277 [2022-11-16 20:31:53,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=1210, Invalid=2330, Unknown=0, NotChecked=0, Total=3540 [2022-11-16 20:31:53,598 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 837 mSDsluCounter, 1623 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 1746 SdHoareTripleChecker+Invalid, 1377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-11-16 20:31:53,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [837 Valid, 1746 Invalid, 1377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1250 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2022-11-16 20:31:53,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-11-16 20:31:53,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 154. [2022-11-16 20:31:53,646 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) [2022-11-16 20:31:53,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 225 transitions. [2022-11-16 20:31:53,649 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 225 transitions. Word has length 81 [2022-11-16 20:31:53,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:31:53,650 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 225 transitions. [2022-11-16 20:31:53,650 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) [2022-11-16 20:31:53,650 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 225 transitions. [2022-11-16 20:31:53,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-16 20:31:53,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:31:53,652 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] [2022-11-16 20:31:53,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-11-16 20:31:53,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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 [2022-11-16 20:31:54,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2022-11-16 20:31:54,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 20:31:54,256 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:31:54,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:31:54,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1098654470, now seen corresponding path program 3 times [2022-11-16 20:31:54,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:31:54,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [615037316] [2022-11-16 20:31:54,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:31:54,257 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 [2022-11-16 20:31:54,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:31:54,258 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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) [2022-11-16 20:31:54,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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 [2022-11-16 20:31:54,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-11-16 20:31:54,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:31:54,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 20:31:54,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:31:59,997 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 10 proven. 283 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 20:31:59,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:32:11,392 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 10 proven. 283 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 20:32:11,393 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:32:11,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [615037316] [2022-11-16 20:32:11,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [615037316] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:32:11,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [905062186] [2022-11-16 20:32:11,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:32:11,394 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:32:11,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:32:11,395 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:32:11,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-16 20:32:11,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-11-16 20:32:11,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:32:11,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 20:32:11,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:32:29,704 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 10 proven. 283 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 20:32:29,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:32:33,398 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 10 proven. 283 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 20:32:33,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [905062186] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:32:33,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326276860] [2022-11-16 20:32:33,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:32:33,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:32:33,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:32:33,400 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:32:33,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-16 20:32:33,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-11-16 20:32:33,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:32:33,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 20:32:33,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:32:43,808 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 26 proven. 273 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:32:43,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:32:56,866 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 4 proven. 283 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 20:32:56,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326276860] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:32:56,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 20:32:56,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 25, 25, 19, 19] total 90 [2022-11-16 20:32:56,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396662070] [2022-11-16 20:32:56,867 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 20:32:56,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-11-16 20:32:56,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:32:56,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-11-16 20:32:56,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=7224, Unknown=6, NotChecked=0, Total=8010 [2022-11-16 20:32:56,871 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) [2022-11-16 20:35:51,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:35:51,233 INFO L93 Difference]: Finished difference Result 592 states and 1040 transitions. [2022-11-16 20:35:51,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2022-11-16 20:35:51,234 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 [2022-11-16 20:35:51,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:35:51,238 INFO L225 Difference]: With dead ends: 592 [2022-11-16 20:35:51,238 INFO L226 Difference]: Without dead ends: 440 [2022-11-16 20:35:51,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 746 GetRequests, 482 SyntacticMatches, 21 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20371 ImplicationChecksByTransitivity, 180.4s TimeCoverageRelationStatistics Valid=9775, Invalid=49999, Unknown=6, NotChecked=0, Total=59780 [2022-11-16 20:35:51,262 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 3215 mSDsluCounter, 5156 mSDsCounter, 0 mSdLazyCounter, 7673 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3250 SdHoareTripleChecker+Valid, 5271 SdHoareTripleChecker+Invalid, 12164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 7673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4281 IncrementalHoareTripleChecker+Unchecked, 44.8s IncrementalHoareTripleChecker+Time [2022-11-16 20:35:51,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3250 Valid, 5271 Invalid, 12164 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [210 Valid, 7673 Invalid, 0 Unknown, 4281 Unchecked, 44.8s Time] [2022-11-16 20:35:51,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-11-16 20:35:51,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 190. [2022-11-16 20:35:51,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 173 states have (on average 1.4450867052023122) internal successors, (250), 177 states have internal predecessors, (250), 8 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (37), 9 states have call predecessors, (37), 7 states have call successors, (37) [2022-11-16 20:35:51,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 295 transitions. [2022-11-16 20:35:51,342 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 295 transitions. Word has length 92 [2022-11-16 20:35:51,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:35:51,343 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 295 transitions. [2022-11-16 20:35:51,343 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) [2022-11-16 20:35:51,343 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 295 transitions. [2022-11-16 20:35:51,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-16 20:35:51,345 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:35:51,345 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] [2022-11-16 20:35:51,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-11-16 20:35:51,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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 [2022-11-16 20:35:51,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-11-16 20:35:51,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:35:51,948 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:35:51,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:35:51,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1995923427, now seen corresponding path program 3 times [2022-11-16 20:35:51,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:35:51,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [971010731] [2022-11-16 20:35:51,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:35:51,949 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 [2022-11-16 20:35:51,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:35:51,951 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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) [2022-11-16 20:35:51,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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 [2022-11-16 20:35:52,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2022-11-16 20:35:52,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:35:52,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 20:35:52,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:35:57,586 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 25 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:35:57,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:36:11,926 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 746 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 20:36:11,926 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:36:11,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [971010731] [2022-11-16 20:36:11,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [971010731] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:36:11,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [264768046] [2022-11-16 20:36:11,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:36:11,927 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:36:11,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:36:11,929 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:36:11,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-16 20:36:12,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2022-11-16 20:36:12,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:36:12,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 20:36:12,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:36:14,633 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 25 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:36:14,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:36:18,080 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 746 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 20:36:18,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [264768046] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:36:18,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971495750] [2022-11-16 20:36:18,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:36:18,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:36:18,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:36:18,082 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:36:18,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-16 20:36:18,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2022-11-16 20:36:18,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:36:18,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 20:36:18,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:36:19,643 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 25 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 20:36:19,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:36:23,069 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 746 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 20:36:23,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971495750] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:36:23,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 20:36:23,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26, 26, 26, 26] total 54 [2022-11-16 20:36:23,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429404003] [2022-11-16 20:36:23,070 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 20:36:23,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-16 20:36:23,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:36:23,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-16 20:36:23,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=777, Invalid=2085, Unknown=0, NotChecked=0, Total=2862 [2022-11-16 20:36:23,073 INFO L87 Difference]: Start difference. First operand 190 states and 295 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) [2022-11-16 20:37:34,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:37:34,034 INFO L93 Difference]: Finished difference Result 666 states and 1142 transitions. [2022-11-16 20:37:34,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-11-16 20:37:34,036 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 [2022-11-16 20:37:34,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:37:34,040 INFO L225 Difference]: With dead ends: 666 [2022-11-16 20:37:34,041 INFO L226 Difference]: Without dead ends: 488 [2022-11-16 20:37:34,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 788 GetRequests, 689 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 55.8s TimeCoverageRelationStatistics Valid=3174, Invalid=6726, Unknown=0, NotChecked=0, Total=9900 [2022-11-16 20:37:34,044 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 2423 mSDsluCounter, 5118 mSDsCounter, 0 mSdLazyCounter, 4386 mSolverCounterSat, 367 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2423 SdHoareTripleChecker+Valid, 5325 SdHoareTripleChecker+Invalid, 4753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 4386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:37:34,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2423 Valid, 5325 Invalid, 4753 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [367 Valid, 4386 Invalid, 0 Unknown, 0 Unchecked, 31.0s Time] [2022-11-16 20:37:34,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-11-16 20:37:34,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 237. [2022-11-16 20:37:34,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 221 states have (on average 1.497737556561086) internal successors, (331), 224 states have internal predecessors, (331), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (32), 9 states have call predecessors, (32), 7 states have call successors, (32) [2022-11-16 20:37:34,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 371 transitions. [2022-11-16 20:37:34,138 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 371 transitions. Word has length 117 [2022-11-16 20:37:34,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:37:34,138 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 371 transitions. [2022-11-16 20:37:34,139 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) [2022-11-16 20:37:34,139 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 371 transitions. [2022-11-16 20:37:34,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-16 20:37:34,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:37:34,141 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] [2022-11-16 20:37:34,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-16 20:37:34,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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)] Forceful destruction successful, exit code 0 [2022-11-16 20:37:34,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2022-11-16 20:37:34,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 20:37:34,747 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:37:34,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:37:34,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1258657602, now seen corresponding path program 1 times [2022-11-16 20:37:34,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:37:34,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [395081660] [2022-11-16 20:37:34,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:37:34,748 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 [2022-11-16 20:37:34,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:37:34,749 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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) [2022-11-16 20:37:34,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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 [2022-11-16 20:37:34,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:37:34,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 20:37:34,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:37:35,242 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2022-11-16 20:37:35,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:37:35,475 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2022-11-16 20:37:35,476 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:37:35,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [395081660] [2022-11-16 20:37:35,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [395081660] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:37:35,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1276787855] [2022-11-16 20:37:35,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:37:35,477 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:37:35,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:37:35,478 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:37:35,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-16 20:37:35,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:37:35,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 20:37:35,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:37:35,674 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2022-11-16 20:37:35,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:37:35,925 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2022-11-16 20:37:35,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1276787855] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:37:35,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251854057] [2022-11-16 20:37:35,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:37:35,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:37:35,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:37:35,927 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:37:35,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-16 20:37:36,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:37:36,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 20:37:36,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:37:36,138 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2022-11-16 20:37:36,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:37:36,399 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2022-11-16 20:37:36,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251854057] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:37:36,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 20:37:36,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 8 [2022-11-16 20:37:36,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229995747] [2022-11-16 20:37:36,400 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 20:37:36,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 20:37:36,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:37:36,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 20:37:36,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 20:37:36,402 INFO L87 Difference]: Start difference. First operand 237 states and 371 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) [2022-11-16 20:37:37,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:37:37,090 INFO L93 Difference]: Finished difference Result 253 states and 386 transitions. [2022-11-16 20:37:37,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 20:37:37,090 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 [2022-11-16 20:37:37,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:37:37,095 INFO L225 Difference]: With dead ends: 253 [2022-11-16 20:37:37,095 INFO L226 Difference]: Without dead ends: 227 [2022-11-16 20:37:37,096 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 [2022-11-16 20:37:37,097 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 [2022-11-16 20:37:37,097 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] [2022-11-16 20:37:37,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-16 20:37:37,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 219. [2022-11-16 20:37:37,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 204 states have (on average 1.5147058823529411) internal successors, (309), 208 states have internal predecessors, (309), 7 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2022-11-16 20:37:37,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 337 transitions. [2022-11-16 20:37:37,147 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 337 transitions. Word has length 125 [2022-11-16 20:37:37,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:37:37,148 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 337 transitions. [2022-11-16 20:37:37,148 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) [2022-11-16 20:37:37,148 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 337 transitions. [2022-11-16 20:37:37,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-16 20:37:37,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:37:37,154 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] [2022-11-16 20:37:37,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-16 20:37:37,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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)] Ended with exit code 0 [2022-11-16 20:37:37,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-11-16 20:37:37,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 20:37:37,761 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:37:37,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:37:37,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1209150703, now seen corresponding path program 1 times [2022-11-16 20:37:37,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:37:37,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864822165] [2022-11-16 20:37:37,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:37:37,762 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 [2022-11-16 20:37:37,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:37:37,763 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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) [2022-11-16 20:37:37,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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 [2022-11-16 20:37:37,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:37:37,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 20:37:37,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:37:38,041 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 866 trivial. 0 not checked. [2022-11-16 20:37:38,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:37:38,042 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:37:38,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864822165] [2022-11-16 20:37:38,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [864822165] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:37:38,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:37:38,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 20:37:38,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057380517] [2022-11-16 20:37:38,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:37:38,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:37:38,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:37:38,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:37:38,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:37:38,044 INFO L87 Difference]: Start difference. First operand 219 states and 337 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) [2022-11-16 20:37:38,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:37:38,451 INFO L93 Difference]: Finished difference Result 255 states and 379 transitions. [2022-11-16 20:37:38,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 20:37:38,452 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 [2022-11-16 20:37:38,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:37:38,454 INFO L225 Difference]: With dead ends: 255 [2022-11-16 20:37:38,454 INFO L226 Difference]: Without dead ends: 243 [2022-11-16 20:37:38,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:37:38,455 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 53 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:37:38,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 253 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 20:37:38,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-11-16 20:37:38,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 220. [2022-11-16 20:37:38,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 205 states have (on average 1.5121951219512195) internal successors, (310), 209 states have internal predecessors, (310), 7 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2022-11-16 20:37:38,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 338 transitions. [2022-11-16 20:37:38,515 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 338 transitions. Word has length 126 [2022-11-16 20:37:38,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:37:38,515 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 338 transitions. [2022-11-16 20:37:38,515 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) [2022-11-16 20:37:38,515 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 338 transitions. [2022-11-16 20:37:38,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-16 20:37:38,516 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:37:38,517 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] [2022-11-16 20:37:38,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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)] Forceful destruction successful, exit code 0 [2022-11-16 20:37:38,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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 [2022-11-16 20:37:38,730 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:37:38,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:37:38,730 INFO L85 PathProgramCache]: Analyzing trace with hash 622344689, now seen corresponding path program 4 times [2022-11-16 20:37:38,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:37:38,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [154282320] [2022-11-16 20:37:38,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:37:38,731 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 [2022-11-16 20:37:38,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:37:38,732 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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) [2022-11-16 20:37:38,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/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 [2022-11-16 20:37:38,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:37:38,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:37:38,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-16 20:37:38,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:37:48,389 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 20:37:48,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:38:07,886 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 20:38:07,887 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:38:07,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [154282320] [2022-11-16 20:38:07,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [154282320] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:38:07,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1551805205] [2022-11-16 20:38:07,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:38:07,887 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:38:07,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:38:07,888 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:38:07,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-11-16 20:38:08,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:38:08,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:38:08,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-16 20:38:08,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:38:10,220 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 20:38:10,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:38:15,238 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 20:38:15,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1551805205] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:38:15,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370336336] [2022-11-16 20:38:15,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:38:15,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:38:15,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:38:15,241 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:38:15,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2542f927-9740-4401-91d2-51dba7b38a3b/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-16 20:38:15,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:38:15,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:38:15,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-16 20:38:15,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:38:35,097 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 20:38:35,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:38:57,154 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 20:38:57,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370336336] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:38:57,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 20:38:57,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33, 33, 33, 33] total 122 [2022-11-16 20:38:57,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134294964] [2022-11-16 20:38:57,154 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 20:38:57,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-11-16 20:38:57,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:38:57,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-11-16 20:38:57,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2829, Invalid=11933, Unknown=0, NotChecked=0, Total=14762 [2022-11-16 20:38:57,159 INFO L87 Difference]: Start difference. First operand 220 states and 338 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)