./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c9ff936057be59b0f479a8c37fd17409fe797633e9a8a05703f5728379735d91 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 10:06:25,037 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:06:25,039 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:06:25,056 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:06:25,056 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:06:25,057 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:06:25,058 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:06:25,060 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:06:25,061 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:06:25,062 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:06:25,063 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:06:25,064 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:06:25,064 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:06:25,065 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:06:25,066 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:06:25,067 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:06:25,067 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:06:25,068 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:06:25,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:06:25,071 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:06:25,072 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:06:25,074 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:06:25,075 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:06:25,075 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:06:25,078 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:06:25,079 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:06:25,079 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:06:25,080 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:06:25,080 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:06:25,081 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:06:25,081 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:06:25,082 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:06:25,083 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:06:25,083 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:06:25,084 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:06:25,084 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:06:25,085 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:06:25,085 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:06:25,085 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:06:25,086 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:06:25,087 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:06:25,088 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 10:06:25,119 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:06:25,119 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:06:25,128 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:06:25,128 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:06:25,129 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:06:25,129 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:06:25,129 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:06:25,129 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:06:25,130 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:06:25,130 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 10:06:25,130 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:06:25,130 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:06:25,130 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 10:06:25,130 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 10:06:25,130 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:06:25,131 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 10:06:25,131 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 10:06:25,131 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 10:06:25,132 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:06:25,132 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:06:25,132 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:06:25,132 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:06:25,132 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:06:25,133 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 10:06:25,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:06:25,133 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 10:06:25,133 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:06:25,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 10:06:25,133 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:06:25,133 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 10:06:25,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:06:25,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:06:25,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:06:25,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:06:25,134 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 10:06:25,135 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:06:25,135 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 10:06:25,135 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 10:06:25,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 10:06:25,135 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 10:06:25,135 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:06:25,135 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_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c9ff936057be59b0f479a8c37fd17409fe797633e9a8a05703f5728379735d91 [2022-12-14 10:06:25,297 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:06:25,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:06:25,316 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:06:25,317 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:06:25,317 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:06:25,318 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c [2022-12-14 10:06:27,882 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:06:28,029 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:06:28,029 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c [2022-12-14 10:06:28,035 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/data/42b354a7f/bbebd13bbbc940ce91d22a270af1b157/FLAGb8147c924 [2022-12-14 10:06:28,047 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/data/42b354a7f/bbebd13bbbc940ce91d22a270af1b157 [2022-12-14 10:06:28,049 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:06:28,050 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:06:28,051 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:06:28,051 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:06:28,054 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:06:28,054 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:06:28" (1/1) ... [2022-12-14 10:06:28,055 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e2ca65a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:06:28, skipping insertion in model container [2022-12-14 10:06:28,055 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:06:28" (1/1) ... [2022-12-14 10:06:28,060 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:06:28,080 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:06:28,195 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c[755,768] [2022-12-14 10:06:28,247 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:06:28,255 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 10:06:28,264 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c[755,768] [2022-12-14 10:06:28,300 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:06:28,314 INFO L208 MainTranslator]: Completed translation [2022-12-14 10:06:28,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:06:28 WrapperNode [2022-12-14 10:06:28,315 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:06:28,316 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 10:06:28,316 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 10:06:28,316 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 10:06:28,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:06:28" (1/1) ... [2022-12-14 10:06:28,332 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:06:28" (1/1) ... [2022-12-14 10:06:28,358 INFO L138 Inliner]: procedures = 17, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 202 [2022-12-14 10:06:28,359 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 10:06:28,360 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 10:06:28,360 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 10:06:28,360 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 10:06:28,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:06:28" (1/1) ... [2022-12-14 10:06:28,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:06:28" (1/1) ... [2022-12-14 10:06:28,371 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:06:28" (1/1) ... [2022-12-14 10:06:28,371 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:06:28" (1/1) ... [2022-12-14 10:06:28,377 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:06:28" (1/1) ... [2022-12-14 10:06:28,382 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:06:28" (1/1) ... [2022-12-14 10:06:28,384 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:06:28" (1/1) ... [2022-12-14 10:06:28,386 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:06:28" (1/1) ... [2022-12-14 10:06:28,389 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 10:06:28,390 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 10:06:28,390 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 10:06:28,390 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 10:06:28,391 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:06:28" (1/1) ... [2022-12-14 10:06:28,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:06:28,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:06:28,421 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 10:06:28,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 10:06:28,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 10:06:28,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 10:06:28,456 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-12-14 10:06:28,456 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-12-14 10:06:28,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 10:06:28,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 10:06:28,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 10:06:28,456 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 10:06:28,519 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 10:06:28,520 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 10:06:28,837 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 10:06:29,017 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 10:06:29,018 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 10:06:29,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:06:29 BoogieIcfgContainer [2022-12-14 10:06:29,020 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 10:06:29,023 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 10:06:29,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 10:06:29,026 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 10:06:29,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:06:28" (1/3) ... [2022-12-14 10:06:29,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b49d1a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:06:29, skipping insertion in model container [2022-12-14 10:06:29,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:06:28" (2/3) ... [2022-12-14 10:06:29,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b49d1a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:06:29, skipping insertion in model container [2022-12-14 10:06:29,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:06:29" (3/3) ... [2022-12-14 10:06:29,029 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_1-2a.c.cil.c [2022-12-14 10:06:29,043 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 10:06:29,043 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 10:06:29,080 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:06:29,085 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;@128a8987, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:06:29,085 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 10:06:29,088 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 36 states have internal predecessors, (51), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 10:06:29,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 10:06:29,094 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:06:29,095 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:06:29,095 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:06:29,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:06:29,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1555672030, now seen corresponding path program 1 times [2022-12-14 10:06:29,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:06:29,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671106435] [2022-12-14 10:06:29,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:06:29,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:06:29,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:06:29,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 10:06:29,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:06:29,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671106435] [2022-12-14 10:06:29,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671106435] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:06:29,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:06:29,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 10:06:29,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356650401] [2022-12-14 10:06:29,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:06:29,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 10:06:29,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:06:29,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 10:06:29,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:06:29,601 INFO L87 Difference]: Start difference. First operand has 45 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 36 states have internal predecessors, (51), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 10:06:29,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:06:29,781 INFO L93 Difference]: Finished difference Result 127 states and 210 transitions. [2022-12-14 10:06:29,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 10:06:29,783 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-12-14 10:06:29,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:06:29,790 INFO L225 Difference]: With dead ends: 127 [2022-12-14 10:06:29,790 INFO L226 Difference]: Without dead ends: 78 [2022-12-14 10:06:29,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-12-14 10:06:29,795 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 51 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:06:29,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 348 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:06:29,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-12-14 10:06:29,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 49. [2022-12-14 10:06:29,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 38 states have internal predecessors, (50), 9 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2022-12-14 10:06:29,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 71 transitions. [2022-12-14 10:06:29,827 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 71 transitions. Word has length 24 [2022-12-14 10:06:29,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:06:29,828 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 71 transitions. [2022-12-14 10:06:29,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 10:06:29,828 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 71 transitions. [2022-12-14 10:06:29,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 10:06:29,829 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:06:29,830 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:06:29,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 10:06:29,830 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:06:29,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:06:29,830 INFO L85 PathProgramCache]: Analyzing trace with hash 919226255, now seen corresponding path program 1 times [2022-12-14 10:06:29,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:06:29,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728909176] [2022-12-14 10:06:29,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:06:29,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:06:29,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:06:30,006 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 10:06:30,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:06:30,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728909176] [2022-12-14 10:06:30,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728909176] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:06:30,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248019091] [2022-12-14 10:06:30,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:06:30,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:06:30,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:06:30,009 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:06:30,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 10:06:30,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:06:30,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 10:06:30,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:06:30,242 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 10:06:30,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:06:30,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 10:06:30,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248019091] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:06:30,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [922897456] [2022-12-14 10:06:30,454 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-12-14 10:06:30,454 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:06:30,457 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:06:30,462 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:06:30,463 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:06:30,695 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 60 for LOIs [2022-12-14 10:06:30,721 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:06:32,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [922897456] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:06:32,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:06:32,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [9, 11, 9] total 36 [2022-12-14 10:06:32,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140556683] [2022-12-14 10:06:32,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:06:32,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 10:06:32,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:06:32,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 10:06:32,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 10:06:32,293 INFO L87 Difference]: Start difference. First operand 49 states and 71 transitions. Second operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 10:06:32,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:06:32,975 INFO L93 Difference]: Finished difference Result 132 states and 213 transitions. [2022-12-14 10:06:32,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 10:06:32,975 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2022-12-14 10:06:32,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:06:32,978 INFO L225 Difference]: With dead ends: 132 [2022-12-14 10:06:32,978 INFO L226 Difference]: Without dead ends: 118 [2022-12-14 10:06:32,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 10:06:32,980 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 97 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:06:32,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 266 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 10:06:32,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-12-14 10:06:32,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 60. [2022-12-14 10:06:32,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 46 states have internal predecessors, (58), 11 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (22), 12 states have call predecessors, (22), 10 states have call successors, (22) [2022-12-14 10:06:33,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 91 transitions. [2022-12-14 10:06:33,001 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 91 transitions. Word has length 27 [2022-12-14 10:06:33,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:06:33,001 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 91 transitions. [2022-12-14 10:06:33,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 10:06:33,002 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 91 transitions. [2022-12-14 10:06:33,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 10:06:33,003 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:06:33,003 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:06:33,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 10:06:33,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:06:33,206 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:06:33,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:06:33,207 INFO L85 PathProgramCache]: Analyzing trace with hash 732602016, now seen corresponding path program 1 times [2022-12-14 10:06:33,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:06:33,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354990662] [2022-12-14 10:06:33,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:06:33,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:06:33,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:06:33,819 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 10:06:33,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:06:33,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354990662] [2022-12-14 10:06:33,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354990662] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:06:33,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:06:33,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-12-14 10:06:33,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661011860] [2022-12-14 10:06:33,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:06:33,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 10:06:33,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:06:33,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 10:06:33,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-12-14 10:06:33,822 INFO L87 Difference]: Start difference. First operand 60 states and 91 transitions. Second operand has 15 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 10:06:34,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:06:34,217 INFO L93 Difference]: Finished difference Result 101 states and 148 transitions. [2022-12-14 10:06:34,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 10:06:34,218 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-12-14 10:06:34,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:06:34,218 INFO L225 Difference]: With dead ends: 101 [2022-12-14 10:06:34,219 INFO L226 Difference]: Without dead ends: 88 [2022-12-14 10:06:34,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-12-14 10:06:34,220 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 70 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:06:34,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 570 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:06:34,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-14 10:06:34,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2022-12-14 10:06:34,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 48 states have internal predecessors, (60), 13 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (23), 13 states have call predecessors, (23), 12 states have call successors, (23) [2022-12-14 10:06:34,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 96 transitions. [2022-12-14 10:06:34,242 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 96 transitions. Word has length 28 [2022-12-14 10:06:34,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:06:34,242 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 96 transitions. [2022-12-14 10:06:34,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 10:06:34,243 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 96 transitions. [2022-12-14 10:06:34,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 10:06:34,244 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:06:34,244 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:06:34,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 10:06:34,244 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:06:34,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:06:34,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1051064078, now seen corresponding path program 1 times [2022-12-14 10:06:34,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:06:34,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533584461] [2022-12-14 10:06:34,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:06:34,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:06:34,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:06:34,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 10:06:34,573 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:06:34,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533584461] [2022-12-14 10:06:34,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533584461] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:06:34,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448021292] [2022-12-14 10:06:34,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:06:34,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:06:34,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:06:34,575 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:06:34,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 10:06:34,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:06:34,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 10:06:34,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:06:34,706 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 10:06:34,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:06:34,921 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 10:06:34,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448021292] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:06:34,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [593327113] [2022-12-14 10:06:34,924 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-12-14 10:06:34,924 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:06:34,924 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:06:34,924 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:06:34,925 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:06:49,612 WARN L233 SmtUtils]: Spent 13.93s on a formula simplification that was a NOOP. DAG size: 646 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-12-14 10:07:03,556 WARN L233 SmtUtils]: Spent 13.93s on a formula simplification that was a NOOP. DAG size: 646 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-12-14 10:07:54,945 WARN L233 SmtUtils]: Spent 13.74s on a formula simplification that was a NOOP. DAG size: 646 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-12-14 10:08:10,535 WARN L233 SmtUtils]: Spent 15.58s on a formula simplification that was a NOOP. DAG size: 646 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-12-14 10:08:10,551 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-12-14 10:08:10,561 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 60 for LOIs [2022-12-14 10:08:10,672 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:08:42,792 WARN L233 SmtUtils]: Spent 29.83s on a formula simplification. DAG size of input: 646 DAG size of output: 216 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:08:42,928 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1194#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-12-14 10:08:42,928 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:08:42,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:08:42,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-12-14 10:08:42,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636977163] [2022-12-14 10:08:42,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:08:42,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 10:08:42,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:08:42,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 10:08:42,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2022-12-14 10:08:42,930 INFO L87 Difference]: Start difference. First operand 62 states and 96 transitions. Second operand has 18 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 6 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2022-12-14 10:08:43,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:08:43,532 INFO L93 Difference]: Finished difference Result 152 states and 231 transitions. [2022-12-14 10:08:43,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 10:08:43,532 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 6 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) Word has length 28 [2022-12-14 10:08:43,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:08:43,534 INFO L225 Difference]: With dead ends: 152 [2022-12-14 10:08:43,534 INFO L226 Difference]: Without dead ends: 96 [2022-12-14 10:08:43,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 32.6s TimeCoverageRelationStatistics Valid=159, Invalid=1401, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 10:08:43,537 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 83 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:08:43,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 529 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:08:43,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-12-14 10:08:43,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 64. [2022-12-14 10:08:43,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 49 states have internal predecessors, (63), 12 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (18), 13 states have call predecessors, (18), 11 states have call successors, (18) [2022-12-14 10:08:43,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 93 transitions. [2022-12-14 10:08:43,550 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 93 transitions. Word has length 28 [2022-12-14 10:08:43,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:08:43,550 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 93 transitions. [2022-12-14 10:08:43,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 6 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2022-12-14 10:08:43,550 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 93 transitions. [2022-12-14 10:08:43,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 10:08:43,551 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:08:43,551 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:08:43,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 10:08:43,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:08:43,753 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:08:43,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:08:43,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1191066773, now seen corresponding path program 1 times [2022-12-14 10:08:43,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:08:43,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524606124] [2022-12-14 10:08:43,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:08:43,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:08:43,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:08:43,921 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 10:08:43,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:08:43,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524606124] [2022-12-14 10:08:43,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524606124] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:08:43,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198403730] [2022-12-14 10:08:43,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:08:43,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:08:43,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:08:43,923 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:08:43,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 10:08:43,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:08:43,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 10:08:43,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:08:44,067 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 10:08:44,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:08:44,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 10:08:44,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198403730] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:08:44,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1386007897] [2022-12-14 10:08:44,219 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 10:08:44,219 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:08:44,220 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:08:44,220 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:08:44,220 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:08:44,576 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 60 for LOIs [2022-12-14 10:08:44,626 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:08:46,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1386007897] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:08:46,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:08:46,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [8, 11, 9] total 37 [2022-12-14 10:08:46,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500092593] [2022-12-14 10:08:46,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:08:46,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 10:08:46,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:08:46,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 10:08:46,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1204, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 10:08:46,200 INFO L87 Difference]: Start difference. First operand 64 states and 93 transitions. Second operand has 17 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 10:08:47,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:08:47,552 INFO L93 Difference]: Finished difference Result 116 states and 171 transitions. [2022-12-14 10:08:47,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 10:08:47,553 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2022-12-14 10:08:47,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:08:47,553 INFO L225 Difference]: With dead ends: 116 [2022-12-14 10:08:47,553 INFO L226 Difference]: Without dead ends: 97 [2022-12-14 10:08:47,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=221, Invalid=1759, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 10:08:47,554 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 92 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:08:47,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 266 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:08:47,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-12-14 10:08:47,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 68. [2022-12-14 10:08:47,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 50 states have (on average 1.34) internal successors, (67), 53 states have internal predecessors, (67), 12 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (21), 13 states have call predecessors, (21), 11 states have call successors, (21) [2022-12-14 10:08:47,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 100 transitions. [2022-12-14 10:08:47,569 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 100 transitions. Word has length 30 [2022-12-14 10:08:47,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:08:47,569 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 100 transitions. [2022-12-14 10:08:47,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 10:08:47,569 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 100 transitions. [2022-12-14 10:08:47,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 10:08:47,570 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:08:47,570 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:08:47,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 10:08:47,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:08:47,771 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:08:47,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:08:47,771 INFO L85 PathProgramCache]: Analyzing trace with hash 529264223, now seen corresponding path program 1 times [2022-12-14 10:08:47,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:08:47,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4534206] [2022-12-14 10:08:47,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:08:47,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:08:47,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:08:47,883 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 10:08:47,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:08:47,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4534206] [2022-12-14 10:08:47,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4534206] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:08:47,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690416375] [2022-12-14 10:08:47,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:08:47,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:08:47,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:08:47,885 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:08:47,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 10:08:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:08:47,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 10:08:47,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:08:48,001 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 10:08:48,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:08:48,120 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 10:08:48,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690416375] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:08:48,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1654673318] [2022-12-14 10:08:48,122 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-12-14 10:08:48,122 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:08:48,123 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:08:48,123 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:08:48,123 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:08:48,257 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 60 for LOIs [2022-12-14 10:08:48,356 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:08:50,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1654673318] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:08:50,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:08:50,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [7, 11, 9] total 31 [2022-12-14 10:08:50,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811690991] [2022-12-14 10:08:50,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:08:50,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 10:08:50,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:08:50,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 10:08:50,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2022-12-14 10:08:50,026 INFO L87 Difference]: Start difference. First operand 68 states and 100 transitions. Second operand has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 10:08:50,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:08:50,933 INFO L93 Difference]: Finished difference Result 100 states and 143 transitions. [2022-12-14 10:08:50,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 10:08:50,934 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2022-12-14 10:08:50,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:08:50,934 INFO L225 Difference]: With dead ends: 100 [2022-12-14 10:08:50,934 INFO L226 Difference]: Without dead ends: 83 [2022-12-14 10:08:50,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 10:08:50,936 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 85 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:08:50,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 121 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 10:08:50,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-12-14 10:08:50,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2022-12-14 10:08:50,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 53 states have internal predecessors, (68), 10 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (19), 11 states have call predecessors, (19), 9 states have call successors, (19) [2022-12-14 10:08:50,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 97 transitions. [2022-12-14 10:08:50,957 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 97 transitions. Word has length 31 [2022-12-14 10:08:50,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:08:50,957 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 97 transitions. [2022-12-14 10:08:50,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 10:08:50,958 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 97 transitions. [2022-12-14 10:08:50,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 10:08:50,958 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:08:50,958 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:08:50,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 10:08:51,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:08:51,160 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:08:51,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:08:51,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1528680912, now seen corresponding path program 1 times [2022-12-14 10:08:51,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:08:51,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606837260] [2022-12-14 10:08:51,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:08:51,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:08:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:08:51,776 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 10:08:51,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:08:51,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606837260] [2022-12-14 10:08:51,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606837260] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:08:51,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313559415] [2022-12-14 10:08:51,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:08:51,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:08:51,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:08:51,777 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:08:51,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 10:08:51,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:08:51,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-14 10:08:51,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:08:52,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 10:08:52,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:08:52,350 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 10:08:52,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313559415] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 10:08:52,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 10:08:52,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13, 14] total 24 [2022-12-14 10:08:52,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039527178] [2022-12-14 10:08:52,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:08:52,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 10:08:52,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:08:52,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 10:08:52,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2022-12-14 10:08:52,352 INFO L87 Difference]: Start difference. First operand 67 states and 97 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 10:08:52,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:08:52,709 INFO L93 Difference]: Finished difference Result 83 states and 117 transitions. [2022-12-14 10:08:52,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 10:08:52,709 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2022-12-14 10:08:52,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:08:52,710 INFO L225 Difference]: With dead ends: 83 [2022-12-14 10:08:52,710 INFO L226 Difference]: Without dead ends: 55 [2022-12-14 10:08:52,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2022-12-14 10:08:52,711 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 52 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:08:52,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 298 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:08:52,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-14 10:08:52,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2022-12-14 10:08:52,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 42 states have internal predecessors, (51), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 10:08:52,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 69 transitions. [2022-12-14 10:08:52,726 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 69 transitions. Word has length 32 [2022-12-14 10:08:52,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:08:52,726 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 69 transitions. [2022-12-14 10:08:52,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 10:08:52,726 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 69 transitions. [2022-12-14 10:08:52,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 10:08:52,727 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:08:52,727 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:08:52,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 10:08:52,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:08:52,929 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:08:52,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:08:52,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1065423042, now seen corresponding path program 2 times [2022-12-14 10:08:52,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:08:52,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643017950] [2022-12-14 10:08:52,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:08:52,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:08:52,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 10:08:52,978 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 10:08:53,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 10:08:53,074 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 10:08:53,074 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 10:08:53,075 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 10:08:53,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 10:08:53,079 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2022-12-14 10:08:53,082 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 10:08:53,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 10:08:53 BoogieIcfgContainer [2022-12-14 10:08:53,110 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 10:08:53,110 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 10:08:53,110 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 10:08:53,110 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 10:08:53,111 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:06:29" (3/4) ... [2022-12-14 10:08:53,113 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-12-14 10:08:53,113 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 10:08:53,113 INFO L158 Benchmark]: Toolchain (without parser) took 145063.29ms. Allocated memory was 117.4MB in the beginning and 302.0MB in the end (delta: 184.5MB). Free memory was 76.9MB in the beginning and 249.9MB in the end (delta: -173.0MB). Peak memory consumption was 13.1MB. Max. memory is 16.1GB. [2022-12-14 10:08:53,113 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 117.4MB. Free memory is still 84.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 10:08:53,114 INFO L158 Benchmark]: CACSL2BoogieTranslator took 263.96ms. Allocated memory is still 117.4MB. Free memory was 76.9MB in the beginning and 62.6MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-12-14 10:08:53,114 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.24ms. Allocated memory is still 117.4MB. Free memory was 62.6MB in the beginning and 60.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 10:08:53,114 INFO L158 Benchmark]: Boogie Preprocessor took 29.71ms. Allocated memory is still 117.4MB. Free memory was 60.5MB in the beginning and 58.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 10:08:53,114 INFO L158 Benchmark]: RCFGBuilder took 630.58ms. Allocated memory was 117.4MB in the beginning and 174.1MB in the end (delta: 56.6MB). Free memory was 58.4MB in the beginning and 117.7MB in the end (delta: -59.3MB). Peak memory consumption was 32.3MB. Max. memory is 16.1GB. [2022-12-14 10:08:53,115 INFO L158 Benchmark]: TraceAbstraction took 144086.91ms. Allocated memory was 174.1MB in the beginning and 302.0MB in the end (delta: 127.9MB). Free memory was 117.4MB in the beginning and 249.9MB in the end (delta: -132.5MB). Peak memory consumption was 160.9MB. Max. memory is 16.1GB. [2022-12-14 10:08:53,115 INFO L158 Benchmark]: Witness Printer took 2.73ms. Allocated memory is still 302.0MB. Free memory is still 249.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 10:08:53,116 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 117.4MB. Free memory is still 84.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 263.96ms. Allocated memory is still 117.4MB. Free memory was 76.9MB in the beginning and 62.6MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.24ms. Allocated memory is still 117.4MB. Free memory was 62.6MB in the beginning and 60.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.71ms. Allocated memory is still 117.4MB. Free memory was 60.5MB in the beginning and 58.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 630.58ms. Allocated memory was 117.4MB in the beginning and 174.1MB in the end (delta: 56.6MB). Free memory was 58.4MB in the beginning and 117.7MB in the end (delta: -59.3MB). Peak memory consumption was 32.3MB. Max. memory is 16.1GB. * TraceAbstraction took 144086.91ms. Allocated memory was 174.1MB in the beginning and 302.0MB in the end (delta: 127.9MB). Free memory was 117.4MB in the beginning and 249.9MB in the end (delta: -132.5MB). Peak memory consumption was 160.9MB. Max. memory is 16.1GB. * Witness Printer took 2.73ms. Allocated memory is still 302.0MB. Free memory is still 249.9MB. 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: 18]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 111, overapproximation of bitwiseAnd at line 109, overapproximation of bitwiseComplement at line 77. Possible FailurePath: [L227] unsigned int a ; [L228] unsigned int ma = __VERIFIER_nondet_uint(); [L229] signed char ea = __VERIFIER_nondet_char(); [L230] unsigned int b ; [L231] unsigned int mb = __VERIFIER_nondet_uint(); [L232] signed char eb = __VERIFIER_nondet_char(); [L233] unsigned int r_add ; [L234] unsigned int zero ; [L235] int sa ; [L236] int sb ; [L237] int tmp ; [L238] int tmp___0 ; [L239] int tmp___1 ; [L240] int tmp___2 ; [L241] int tmp___3 ; [L242] int tmp___4 ; [L243] int tmp___5 ; [L244] int tmp___6 ; [L245] int tmp___7 ; [L246] int tmp___8 ; [L247] int tmp___9 ; [L248] int __retres23 ; VAL [ea=-128, eb=127] [L252] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L30] COND TRUE ! m [L31] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L81] return (__retres4); [L252] RET, EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0, ea=-128, eb=127] [L252] zero = base2flt(0, 0) [L253] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=-128, \old(m)=16777216] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=-128, \old(m)=16777216, e=-128, m=16777216] [L30] COND FALSE !(! m) VAL [\old(e)=-128, \old(m)=16777216, e=-128, m=16777216] [L36] COND FALSE !(m < 1U << 24U) VAL [\old(e)=-128, \old(m)=16777216, e=-128, m=16777216] [L58] COND TRUE 1 VAL [\old(e)=-128, \old(m)=16777216, e=-128, m=16777216] [L60] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=-128, \old(m)=16777216, e=-128, m=16777216] [L77] m = m & ~ (1U << 24U) [L78] res = m | ((unsigned int ) (e + 128) << 24U) [L79] __retres4 = res VAL [\old(e)=-128, \old(m)=16777216, __retres4=16777214, e=-128, m=16777214, res=16777214] [L81] return (__retres4); [L253] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=36028801330708478, ea=-128, eb=127, ma=16777216, zero=0] [L253] a = base2flt(ma, ea) [L254] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=127, \old(m)=33554431] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=33554431, e=127, m=33554431] [L30] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=33554431, e=127, m=33554431] [L36] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=33554431, e=127, m=33554431] [L58] COND TRUE 1 VAL [\old(e)=127, \old(m)=33554431, e=127, m=33554431] [L60] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=127, \old(m)=33554431, e=127, m=33554431] [L77] m = m & ~ (1U << 24U) [L78] res = m | ((unsigned int ) (e + 128) << 24U) [L79] __retres4 = res VAL [\old(e)=127, \old(m)=33554431, __retres4=16777215, e=127, m=33554431, res=16777215] [L81] return (__retres4); [L254] RET, EXPR base2flt(mb, eb) VAL [a=16777214, base2flt(mb, eb)=36028797035741183, ea=-128, eb=127, ma=16777216, mb=33554431, zero=0] [L254] b = base2flt(mb, eb) [L256] COND FALSE !(a < zero) [L259] COND TRUE a > zero [L260] tmp = 1 [L264] sa = tmp [L266] COND FALSE !(b < zero) [L269] COND TRUE b > zero [L270] tmp___0 = 1 [L274] sb = tmp___0 [L277] CALL addflt(a, b) [L85] unsigned int res ; [L86] unsigned int ma ; [L87] unsigned int mb ; [L88] unsigned int delta ; [L89] int ea ; [L90] int eb ; [L91] unsigned int tmp ; [L92] unsigned int __retres10 ; [L95] COND TRUE a < b [L96] tmp = a [L97] a = b [L98] b = tmp VAL [\old(a)=16777214, \old(b)=16777215, a=16777215, b=16777214, tmp=16777214] [L102] COND FALSE !(! b) [L109] ma = a & ((1U << 24U) - 1U) [L110] ea = (int )(a >> 24U) - 128 [L111] ma = ma | (1U << 24U) [L112] mb = b & ((1U << 24U) - 1U) [L113] eb = (int )(b >> 24U) - 128 [L114] mb = mb | (1U << 24U) VAL [\old(a)=16777214, \old(b)=16777215, a=16777215, b=16777214, ea=-2147483776, eb=-2147483520, ma=16777216, mb=16777216, tmp=16777214] [L115] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=0] [L17] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L18] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 45 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 144.0s, OverallIterations: 8, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 4.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 595 SdHoareTripleChecker+Valid, 2.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 530 mSDsluCounter, 2398 SdHoareTripleChecker+Invalid, 2.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2076 mSDsCounter, 63 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2524 IncrementalHoareTripleChecker+Invalid, 2587 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 63 mSolverCounterUnsat, 322 mSDtfsCounter, 2524 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 525 GetRequests, 320 SyntacticMatches, 2 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 39.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=5, InterpolantAutomatonStates: 101, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 192 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.7s InterpolantComputationTime, 380 NumberOfCodeBlocks, 380 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 479 ConstructedInterpolants, 0 QuantifiedInterpolants, 1648 SizeOfPredicates, 54 NumberOfNonLiveVariables, 594 ConjunctsInSsa, 123 ConjunctsInUnsatCore, 17 InterpolantComputations, 3 PerfectInterpolantSequences, 142/204 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.9s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 6, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 63, DAG_INTERPRETER_EARLY_EXITS: 3, TOOLS_POST_APPLICATIONS: 58, TOOLS_POST_TIME: 0.3s, TOOLS_POST_CALL_APPLICATIONS: 27, TOOLS_POST_CALL_TIME: 0.2s, TOOLS_POST_RETURN_APPLICATIONS: 18, TOOLS_POST_RETURN_TIME: 0.1s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 103, TOOLS_QUANTIFIERELIM_TIME: 0.6s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 147, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 30, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 63, DOMAIN_ISBOTTOM_TIME: 0.1s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 18, CALL_SUMMARIZER_CACHE_MISSES: 3, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 631, DAG_COMPRESSION_RETAINED_NODES: 154, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-12-14 10:08:53,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c9ff936057be59b0f479a8c37fd17409fe797633e9a8a05703f5728379735d91 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 10:08:54,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:08:54,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:08:54,775 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:08:54,775 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:08:54,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:08:54,777 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:08:54,778 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:08:54,780 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:08:54,781 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:08:54,782 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:08:54,783 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:08:54,784 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:08:54,784 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:08:54,785 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:08:54,786 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:08:54,787 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:08:54,787 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:08:54,788 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:08:54,790 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:08:54,791 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:08:54,792 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:08:54,793 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:08:54,795 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:08:54,801 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:08:54,802 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:08:54,802 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:08:54,803 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:08:54,803 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:08:54,804 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:08:54,804 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:08:54,805 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:08:54,805 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:08:54,806 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:08:54,807 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:08:54,807 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:08:54,807 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:08:54,808 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:08:54,808 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:08:54,808 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:08:54,809 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:08:54,809 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-12-14 10:08:54,834 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:08:54,834 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:08:54,834 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:08:54,834 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:08:54,835 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:08:54,835 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:08:54,835 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:08:54,836 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:08:54,836 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:08:54,836 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:08:54,836 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:08:54,836 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:08:54,837 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:08:54,837 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:08:54,837 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:08:54,837 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:08:54,838 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 10:08:54,838 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:08:54,838 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 10:08:54,838 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 10:08:54,838 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 10:08:54,838 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 10:08:54,838 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:08:54,839 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 10:08:54,839 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:08:54,839 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 10:08:54,839 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:08:54,839 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 10:08:54,840 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:08:54,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:08:54,840 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:08:54,840 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:08:54,840 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 10:08:54,840 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 10:08:54,841 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 10:08:54,841 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 10:08:54,841 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:08:54,841 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 10:08:54,841 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_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c9ff936057be59b0f479a8c37fd17409fe797633e9a8a05703f5728379735d91 [2022-12-14 10:08:55,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:08:55,101 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:08:55,103 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:08:55,104 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:08:55,105 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:08:55,106 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c [2022-12-14 10:08:57,712 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:08:57,863 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:08:57,864 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c [2022-12-14 10:08:57,872 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/data/b20d4b8f7/f8bcd852f6fc415fb29857e1a4451eef/FLAG265d5b205 [2022-12-14 10:08:57,886 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/data/b20d4b8f7/f8bcd852f6fc415fb29857e1a4451eef [2022-12-14 10:08:57,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:08:57,890 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:08:57,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:08:57,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:08:57,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:08:57,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:08:57" (1/1) ... [2022-12-14 10:08:57,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1631ed4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:08:57, skipping insertion in model container [2022-12-14 10:08:57,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:08:57" (1/1) ... [2022-12-14 10:08:57,902 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:08:57,924 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:08:58,042 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c[755,768] [2022-12-14 10:08:58,091 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:08:58,109 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 10:08:58,130 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c[755,768] [2022-12-14 10:08:58,157 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:08:58,170 INFO L208 MainTranslator]: Completed translation [2022-12-14 10:08:58,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:08:58 WrapperNode [2022-12-14 10:08:58,171 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:08:58,172 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 10:08:58,172 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 10:08:58,172 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 10:08:58,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:08:58" (1/1) ... [2022-12-14 10:08:58,189 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:08:58" (1/1) ... [2022-12-14 10:08:58,208 INFO L138 Inliner]: procedures = 17, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 146 [2022-12-14 10:08:58,208 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 10:08:58,209 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 10:08:58,209 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 10:08:58,209 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 10:08:58,217 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:08:58" (1/1) ... [2022-12-14 10:08:58,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:08:58" (1/1) ... [2022-12-14 10:08:58,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:08:58" (1/1) ... [2022-12-14 10:08:58,222 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:08:58" (1/1) ... [2022-12-14 10:08:58,230 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:08:58" (1/1) ... [2022-12-14 10:08:58,236 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:08:58" (1/1) ... [2022-12-14 10:08:58,238 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:08:58" (1/1) ... [2022-12-14 10:08:58,240 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:08:58" (1/1) ... [2022-12-14 10:08:58,244 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 10:08:58,245 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 10:08:58,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 10:08:58,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 10:08:58,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:08:58" (1/1) ... [2022-12-14 10:08:58,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:08:58,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:08:58,271 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 10:08:58,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 10:08:58,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 10:08:58,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 10:08:58,306 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-12-14 10:08:58,306 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-12-14 10:08:58,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 10:08:58,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 10:08:58,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 10:08:58,307 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 10:08:58,374 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 10:08:58,376 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 10:08:58,659 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 10:08:58,665 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 10:08:58,665 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 10:08:58,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:08:58 BoogieIcfgContainer [2022-12-14 10:08:58,666 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 10:08:58,668 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 10:08:58,668 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 10:08:58,671 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 10:08:58,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:08:57" (1/3) ... [2022-12-14 10:08:58,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b45834c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:08:58, skipping insertion in model container [2022-12-14 10:08:58,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:08:58" (2/3) ... [2022-12-14 10:08:58,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b45834c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:08:58, skipping insertion in model container [2022-12-14 10:08:58,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:08:58" (3/3) ... [2022-12-14 10:08:58,673 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_1-2a.c.cil.c [2022-12-14 10:08:58,687 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 10:08:58,687 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 10:08:58,723 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:08:58,727 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;@7e1da0a2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:08:58,728 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 10:08:58,730 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 60 states have (on average 1.6) internal successors, (96), 63 states have internal predecessors, (96), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 10:08:58,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 10:08:58,736 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:08:58,737 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:08:58,737 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:08:58,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:08:58,741 INFO L85 PathProgramCache]: Analyzing trace with hash -760882007, now seen corresponding path program 1 times [2022-12-14 10:08:58,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:08:58,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1337133459] [2022-12-14 10:08:58,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:08:58,750 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:08:58,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:08:58,751 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:08:58,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-14 10:08:58,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:08:58,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 10:08:58,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:08:58,940 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 10:08:58,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:08:59,004 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 10:08:59,005 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:08:59,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1337133459] [2022-12-14 10:08:59,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1337133459] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:08:59,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [802091259] [2022-12-14 10:08:59,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:08:59,007 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:08:59,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:08:59,008 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:08:59,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process [2022-12-14 10:08:59,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:08:59,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 10:08:59,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:08:59,154 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 10:08:59,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:08:59,206 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 10:08:59,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [802091259] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:08:59,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565663692] [2022-12-14 10:08:59,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:08:59,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:08:59,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:08:59,208 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:08:59,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 10:08:59,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:08:59,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 10:08:59,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:08:59,295 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 10:08:59,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:08:59,338 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 10:08:59,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565663692] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:08:59,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:08:59,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8, 8, 8, 8] total 10 [2022-12-14 10:08:59,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160416170] [2022-12-14 10:08:59,341 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:08:59,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 10:08:59,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:08:59,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 10:08:59,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-12-14 10:08:59,367 INFO L87 Difference]: Start difference. First operand has 72 states, 60 states have (on average 1.6) internal successors, (96), 63 states have internal predecessors, (96), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 10:08:59,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:08:59,828 INFO L93 Difference]: Finished difference Result 380 states and 641 transitions. [2022-12-14 10:08:59,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 10:08:59,830 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 32 [2022-12-14 10:08:59,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:08:59,838 INFO L225 Difference]: With dead ends: 380 [2022-12-14 10:08:59,838 INFO L226 Difference]: Without dead ends: 279 [2022-12-14 10:08:59,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-12-14 10:08:59,842 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 322 mSDsluCounter, 1445 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:08:59,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 1661 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:08:59,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-12-14 10:08:59,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 112. [2022-12-14 10:08:59,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 94 states have (on average 1.425531914893617) internal successors, (134), 95 states have internal predecessors, (134), 14 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (20), 16 states have call predecessors, (20), 13 states have call successors, (20) [2022-12-14 10:08:59,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 168 transitions. [2022-12-14 10:08:59,889 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 168 transitions. Word has length 32 [2022-12-14 10:08:59,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:08:59,890 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 168 transitions. [2022-12-14 10:08:59,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 10:08:59,890 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 168 transitions. [2022-12-14 10:08:59,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 10:08:59,892 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:08:59,892 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:08:59,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 10:09:00,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (3)] Ended with exit code 0 [2022-12-14 10:09:00,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-14 10:09:00,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:00,495 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:09:00,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:00,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1276417986, now seen corresponding path program 1 times [2022-12-14 10:09:00,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:09:00,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [680062814] [2022-12-14 10:09:00,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:00,499 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:00,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:09:00,500 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:09:00,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-14 10:09:00,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:00,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 10:09:00,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:00,582 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 10:09:00,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:09:00,583 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:09:00,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [680062814] [2022-12-14 10:09:00,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [680062814] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:09:00,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:09:00,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 10:09:00,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606609751] [2022-12-14 10:09:00,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:09:00,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:09:00,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:09:00,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:09:00,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:09:00,586 INFO L87 Difference]: Start difference. First operand 112 states and 168 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 10:09:00,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:00,656 INFO L93 Difference]: Finished difference Result 248 states and 373 transitions. [2022-12-14 10:09:00,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 10:09:00,656 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-12-14 10:09:00,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:00,659 INFO L225 Difference]: With dead ends: 248 [2022-12-14 10:09:00,659 INFO L226 Difference]: Without dead ends: 187 [2022-12-14 10:09:00,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:09:00,661 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 53 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:00,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 448 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:09:00,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-12-14 10:09:00,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2022-12-14 10:09:00,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 159 states have (on average 1.4150943396226414) internal successors, (225), 158 states have internal predecessors, (225), 20 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (26), 26 states have call predecessors, (26), 19 states have call successors, (26) [2022-12-14 10:09:00,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 271 transitions. [2022-12-14 10:09:00,682 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 271 transitions. Word has length 40 [2022-12-14 10:09:00,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:00,683 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 271 transitions. [2022-12-14 10:09:00,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 10:09:00,683 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 271 transitions. [2022-12-14 10:09:00,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 10:09:00,685 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:00,685 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:00,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-14 10:09:00,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:00,887 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:09:00,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:00,889 INFO L85 PathProgramCache]: Analyzing trace with hash -596359616, now seen corresponding path program 1 times [2022-12-14 10:09:00,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:09:00,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [747582088] [2022-12-14 10:09:00,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:00,892 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:00,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:09:00,895 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:09:00,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-14 10:09:00,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:00,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 10:09:00,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:01,021 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 10:09:01,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:09:01,022 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:09:01,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [747582088] [2022-12-14 10:09:01,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [747582088] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:09:01,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:09:01,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 10:09:01,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486919911] [2022-12-14 10:09:01,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:09:01,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 10:09:01,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:09:01,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 10:09:01,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:09:01,024 INFO L87 Difference]: Start difference. First operand 183 states and 271 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 10:09:01,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:01,106 INFO L93 Difference]: Finished difference Result 256 states and 381 transitions. [2022-12-14 10:09:01,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 10:09:01,106 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-12-14 10:09:01,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:01,107 INFO L225 Difference]: With dead ends: 256 [2022-12-14 10:09:01,107 INFO L226 Difference]: Without dead ends: 201 [2022-12-14 10:09:01,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-12-14 10:09:01,109 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 105 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:01,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 533 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:09:01,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-12-14 10:09:01,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 174. [2022-12-14 10:09:01,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 152 states have (on average 1.394736842105263) internal successors, (212), 151 states have internal predecessors, (212), 18 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (24), 24 states have call predecessors, (24), 17 states have call successors, (24) [2022-12-14 10:09:01,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 254 transitions. [2022-12-14 10:09:01,128 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 254 transitions. Word has length 40 [2022-12-14 10:09:01,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:01,128 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 254 transitions. [2022-12-14 10:09:01,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 10:09:01,129 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 254 transitions. [2022-12-14 10:09:01,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 10:09:01,130 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:01,130 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:01,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-12-14 10:09:01,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:01,331 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:09:01,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:01,332 INFO L85 PathProgramCache]: Analyzing trace with hash -2082074321, now seen corresponding path program 1 times [2022-12-14 10:09:01,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:09:01,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [378757466] [2022-12-14 10:09:01,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:01,332 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:01,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:09:01,333 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:09:01,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-14 10:09:01,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:01,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:09:01,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:01,392 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 10:09:01,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:09:01,392 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:09:01,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [378757466] [2022-12-14 10:09:01,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [378757466] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:09:01,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:09:01,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:09:01,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806558668] [2022-12-14 10:09:01,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:09:01,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:09:01,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:09:01,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:09:01,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:09:01,394 INFO L87 Difference]: Start difference. First operand 174 states and 254 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 10:09:01,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:01,438 INFO L93 Difference]: Finished difference Result 321 states and 475 transitions. [2022-12-14 10:09:01,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:09:01,438 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2022-12-14 10:09:01,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:01,440 INFO L225 Difference]: With dead ends: 321 [2022-12-14 10:09:01,440 INFO L226 Difference]: Without dead ends: 255 [2022-12-14 10:09:01,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:09:01,441 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 68 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:01,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 338 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:09:01,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-12-14 10:09:01,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 223. [2022-12-14 10:09:01,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 199 states have (on average 1.3517587939698492) internal successors, (269), 198 states have internal predecessors, (269), 20 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (26), 26 states have call predecessors, (26), 19 states have call successors, (26) [2022-12-14 10:09:01,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 315 transitions. [2022-12-14 10:09:01,462 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 315 transitions. Word has length 43 [2022-12-14 10:09:01,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:01,462 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 315 transitions. [2022-12-14 10:09:01,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 10:09:01,463 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 315 transitions. [2022-12-14 10:09:01,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 10:09:01,464 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:01,464 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:01,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-14 10:09:01,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:01,666 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:09:01,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:01,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1847325628, now seen corresponding path program 1 times [2022-12-14 10:09:01,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:09:01,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [601201298] [2022-12-14 10:09:01,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:01,669 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:01,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:09:01,672 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:09:01,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-14 10:09:01,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:01,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:09:01,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:01,857 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 10:09:01,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:09:01,858 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:09:01,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [601201298] [2022-12-14 10:09:01,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [601201298] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:09:01,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:09:01,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:09:01,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745383018] [2022-12-14 10:09:01,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:09:01,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:09:01,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:09:01,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:09:01,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:09:01,860 INFO L87 Difference]: Start difference. First operand 223 states and 315 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 10:09:01,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:01,922 INFO L93 Difference]: Finished difference Result 367 states and 518 transitions. [2022-12-14 10:09:01,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:09:01,923 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-12-14 10:09:01,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:01,924 INFO L225 Difference]: With dead ends: 367 [2022-12-14 10:09:01,924 INFO L226 Difference]: Without dead ends: 147 [2022-12-14 10:09:01,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:09:01,925 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 27 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:01,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 247 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:09:01,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-12-14 10:09:01,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 135. [2022-12-14 10:09:01,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 119 states have (on average 1.3277310924369747) internal successors, (158), 121 states have internal predecessors, (158), 11 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (16), 13 states have call predecessors, (16), 10 states have call successors, (16) [2022-12-14 10:09:01,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 185 transitions. [2022-12-14 10:09:01,933 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 185 transitions. Word has length 43 [2022-12-14 10:09:01,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:01,933 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 185 transitions. [2022-12-14 10:09:01,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 10:09:01,934 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 185 transitions. [2022-12-14 10:09:01,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 10:09:01,934 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:01,934 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:01,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-12-14 10:09:02,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:02,135 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:09:02,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:02,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1563397194, now seen corresponding path program 1 times [2022-12-14 10:09:02,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:09:02,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [410976203] [2022-12-14 10:09:02,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:02,136 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:02,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:09:02,137 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:09:02,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-12-14 10:09:02,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:02,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 10:09:02,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:02,284 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 10:09:02,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:09:02,383 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 10:09:02,383 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:09:02,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [410976203] [2022-12-14 10:09:02,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [410976203] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 10:09:02,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:09:02,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-12-14 10:09:02,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828561102] [2022-12-14 10:09:02,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:09:02,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:09:02,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:09:02,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:09:02,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-12-14 10:09:02,385 INFO L87 Difference]: Start difference. First operand 135 states and 185 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 10:09:02,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:02,778 INFO L93 Difference]: Finished difference Result 267 states and 392 transitions. [2022-12-14 10:09:02,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 10:09:02,779 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-12-14 10:09:02,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:02,781 INFO L225 Difference]: With dead ends: 267 [2022-12-14 10:09:02,781 INFO L226 Difference]: Without dead ends: 231 [2022-12-14 10:09:02,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-12-14 10:09:02,783 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 193 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:02,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 519 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:09:02,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-12-14 10:09:02,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 163. [2022-12-14 10:09:02,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 144 states have (on average 1.3194444444444444) internal successors, (190), 147 states have internal predecessors, (190), 14 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (19), 16 states have call predecessors, (19), 13 states have call successors, (19) [2022-12-14 10:09:02,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 223 transitions. [2022-12-14 10:09:02,799 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 223 transitions. Word has length 44 [2022-12-14 10:09:02,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:02,799 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 223 transitions. [2022-12-14 10:09:02,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 10:09:02,800 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 223 transitions. [2022-12-14 10:09:02,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 10:09:02,800 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:02,800 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:02,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-12-14 10:09:03,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:03,001 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:09:03,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:03,002 INFO L85 PathProgramCache]: Analyzing trace with hash -956562740, now seen corresponding path program 1 times [2022-12-14 10:09:03,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:09:03,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [81705514] [2022-12-14 10:09:03,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:03,002 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:03,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:09:03,003 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:09:03,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-14 10:09:03,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:03,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 10:09:03,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:03,056 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 10:09:03,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:09:03,056 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:09:03,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [81705514] [2022-12-14 10:09:03,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [81705514] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:09:03,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:09:03,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 10:09:03,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266931743] [2022-12-14 10:09:03,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:09:03,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:09:03,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:09:03,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:09:03,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:09:03,058 INFO L87 Difference]: Start difference. First operand 163 states and 223 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 10:09:03,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:03,085 INFO L93 Difference]: Finished difference Result 170 states and 229 transitions. [2022-12-14 10:09:03,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:09:03,085 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-12-14 10:09:03,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:03,087 INFO L225 Difference]: With dead ends: 170 [2022-12-14 10:09:03,087 INFO L226 Difference]: Without dead ends: 163 [2022-12-14 10:09:03,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:09:03,088 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 5 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:03,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 377 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:09:03,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-12-14 10:09:03,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-12-14 10:09:03,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 144 states have (on average 1.2986111111111112) internal successors, (187), 147 states have internal predecessors, (187), 14 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (19), 16 states have call predecessors, (19), 13 states have call successors, (19) [2022-12-14 10:09:03,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 220 transitions. [2022-12-14 10:09:03,095 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 220 transitions. Word has length 44 [2022-12-14 10:09:03,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:03,096 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 220 transitions. [2022-12-14 10:09:03,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 10:09:03,096 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 220 transitions. [2022-12-14 10:09:03,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 10:09:03,096 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:03,097 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:03,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-14 10:09:03,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:03,297 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:09:03,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:03,298 INFO L85 PathProgramCache]: Analyzing trace with hash -261265623, now seen corresponding path program 2 times [2022-12-14 10:09:03,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:09:03,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815020567] [2022-12-14 10:09:03,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:09:03,298 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:03,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:09:03,299 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:09:03,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-14 10:09:03,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 10:09:03,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:09:03,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 10:09:03,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:03,426 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 10:09:03,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:09:03,427 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:09:03,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1815020567] [2022-12-14 10:09:03,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1815020567] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:09:03,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:09:03,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 10:09:03,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709208838] [2022-12-14 10:09:03,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:09:03,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:09:03,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:09:03,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:09:03,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:09:03,428 INFO L87 Difference]: Start difference. First operand 163 states and 220 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 10:09:06,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:09:06,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:06,206 INFO L93 Difference]: Finished difference Result 239 states and 336 transitions. [2022-12-14 10:09:06,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 10:09:06,207 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-12-14 10:09:06,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:06,208 INFO L225 Difference]: With dead ends: 239 [2022-12-14 10:09:06,208 INFO L226 Difference]: Without dead ends: 237 [2022-12-14 10:09:06,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:09:06,209 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 87 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:06,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 691 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 57 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-12-14 10:09:06,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-12-14 10:09:06,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 167. [2022-12-14 10:09:06,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 147 states have (on average 1.2925170068027212) internal successors, (190), 150 states have internal predecessors, (190), 14 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (19), 16 states have call predecessors, (19), 13 states have call successors, (19) [2022-12-14 10:09:06,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 223 transitions. [2022-12-14 10:09:06,220 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 223 transitions. Word has length 44 [2022-12-14 10:09:06,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:06,221 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 223 transitions. [2022-12-14 10:09:06,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 10:09:06,221 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 223 transitions. [2022-12-14 10:09:06,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 10:09:06,221 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:06,221 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:06,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-12-14 10:09:06,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:06,423 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:09:06,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:06,424 INFO L85 PathProgramCache]: Analyzing trace with hash -204007321, now seen corresponding path program 1 times [2022-12-14 10:09:06,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:09:06,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1650903869] [2022-12-14 10:09:06,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:06,426 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:06,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:09:06,429 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:09:06,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-14 10:09:06,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:06,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 10:09:06,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:06,570 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 10:09:06,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:09:06,571 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:09:06,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1650903869] [2022-12-14 10:09:06,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1650903869] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:09:06,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:09:06,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 10:09:06,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062272269] [2022-12-14 10:09:06,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:09:06,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:09:06,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:09:06,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:09:06,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:09:06,572 INFO L87 Difference]: Start difference. First operand 167 states and 223 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 10:09:08,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:09:08,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:08,794 INFO L93 Difference]: Finished difference Result 214 states and 292 transitions. [2022-12-14 10:09:08,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 10:09:08,795 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-12-14 10:09:08,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:08,796 INFO L225 Difference]: With dead ends: 214 [2022-12-14 10:09:08,796 INFO L226 Difference]: Without dead ends: 212 [2022-12-14 10:09:08,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:09:08,796 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 88 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:08,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 505 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 48 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-12-14 10:09:08,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-12-14 10:09:08,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 171. [2022-12-14 10:09:08,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 150 states have (on average 1.2866666666666666) internal successors, (193), 153 states have internal predecessors, (193), 14 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (19), 16 states have call predecessors, (19), 13 states have call successors, (19) [2022-12-14 10:09:08,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 226 transitions. [2022-12-14 10:09:08,807 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 226 transitions. Word has length 44 [2022-12-14 10:09:08,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:08,807 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 226 transitions. [2022-12-14 10:09:08,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 10:09:08,807 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 226 transitions. [2022-12-14 10:09:08,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 10:09:08,807 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:08,808 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:08,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-14 10:09:09,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:09,009 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:09:09,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:09,010 INFO L85 PathProgramCache]: Analyzing trace with hash 561980754, now seen corresponding path program 1 times [2022-12-14 10:09:09,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:09:09,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1965950799] [2022-12-14 10:09:09,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:09,011 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:09,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:09:09,012 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:09:09,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-12-14 10:09:09,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:09,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:09:09,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:09,095 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 10:09:09,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:09:09,095 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:09:09,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1965950799] [2022-12-14 10:09:09,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1965950799] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:09:09,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:09:09,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:09:09,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155079859] [2022-12-14 10:09:09,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:09:09,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:09:09,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:09:09,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:09:09,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:09:09,096 INFO L87 Difference]: Start difference. First operand 171 states and 226 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 10:09:09,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:09,134 INFO L93 Difference]: Finished difference Result 283 states and 384 transitions. [2022-12-14 10:09:09,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:09:09,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-12-14 10:09:09,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:09,136 INFO L225 Difference]: With dead ends: 283 [2022-12-14 10:09:09,136 INFO L226 Difference]: Without dead ends: 231 [2022-12-14 10:09:09,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:09:09,136 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 77 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:09,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 312 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:09:09,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-12-14 10:09:09,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 190. [2022-12-14 10:09:09,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 168 states have (on average 1.2916666666666667) internal successors, (217), 170 states have internal predecessors, (217), 15 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (20), 17 states have call predecessors, (20), 14 states have call successors, (20) [2022-12-14 10:09:09,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 252 transitions. [2022-12-14 10:09:09,148 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 252 transitions. Word has length 45 [2022-12-14 10:09:09,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:09,148 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 252 transitions. [2022-12-14 10:09:09,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 10:09:09,149 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 252 transitions. [2022-12-14 10:09:09,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 10:09:09,149 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:09,149 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:09,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-12-14 10:09:09,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:09,350 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:09:09,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:09,352 INFO L85 PathProgramCache]: Analyzing trace with hash 2079579127, now seen corresponding path program 1 times [2022-12-14 10:09:09,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:09:09,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [789648983] [2022-12-14 10:09:09,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:09,354 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:09,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:09:09,357 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:09:09,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-12-14 10:09:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:09,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:09:09,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:09,505 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 10:09:09,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:09:09,505 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:09:09,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [789648983] [2022-12-14 10:09:09,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [789648983] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:09:09,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:09:09,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:09:09,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000951109] [2022-12-14 10:09:09,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:09:09,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:09:09,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:09:09,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:09:09,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:09:09,507 INFO L87 Difference]: Start difference. First operand 190 states and 252 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 10:09:09,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:09,538 INFO L93 Difference]: Finished difference Result 205 states and 268 transitions. [2022-12-14 10:09:09,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:09:09,539 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2022-12-14 10:09:09,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:09,540 INFO L225 Difference]: With dead ends: 205 [2022-12-14 10:09:09,540 INFO L226 Difference]: Without dead ends: 166 [2022-12-14 10:09:09,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:09:09,541 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 1 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:09,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 282 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:09:09,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-12-14 10:09:09,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2022-12-14 10:09:09,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 144 states have (on average 1.3055555555555556) internal successors, (188), 147 states have internal predecessors, (188), 15 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (18), 16 states have call predecessors, (18), 14 states have call successors, (18) [2022-12-14 10:09:09,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 221 transitions. [2022-12-14 10:09:09,557 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 221 transitions. Word has length 48 [2022-12-14 10:09:09,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:09,557 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 221 transitions. [2022-12-14 10:09:09,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 10:09:09,557 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 221 transitions. [2022-12-14 10:09:09,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 10:09:09,558 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:09,558 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:09,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-12-14 10:09:09,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:09,759 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:09:09,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:09,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1609971577, now seen corresponding path program 1 times [2022-12-14 10:09:09,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:09:09,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1927476267] [2022-12-14 10:09:09,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:09,763 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:09,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:09:09,766 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:09:09,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-12-14 10:09:09,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:09,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 10:09:09,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:09,839 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 10:09:09,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:09:09,839 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:09:09,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1927476267] [2022-12-14 10:09:09,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1927476267] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:09:09,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:09:09,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 10:09:09,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089885901] [2022-12-14 10:09:09,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:09:09,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:09:09,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:09:09,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:09:09,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:09:09,841 INFO L87 Difference]: Start difference. First operand 166 states and 221 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 10:09:09,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:09,918 INFO L93 Difference]: Finished difference Result 241 states and 326 transitions. [2022-12-14 10:09:09,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 10:09:09,918 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2022-12-14 10:09:09,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:09,919 INFO L225 Difference]: With dead ends: 241 [2022-12-14 10:09:09,920 INFO L226 Difference]: Without dead ends: 199 [2022-12-14 10:09:09,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:09:09,921 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 132 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:09,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 341 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:09:09,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-12-14 10:09:09,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 166. [2022-12-14 10:09:09,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 144 states have (on average 1.2916666666666667) internal successors, (186), 147 states have internal predecessors, (186), 15 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (18), 16 states have call predecessors, (18), 14 states have call successors, (18) [2022-12-14 10:09:09,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 219 transitions. [2022-12-14 10:09:09,933 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 219 transitions. Word has length 49 [2022-12-14 10:09:09,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:09,933 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 219 transitions. [2022-12-14 10:09:09,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 10:09:09,933 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 219 transitions. [2022-12-14 10:09:09,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 10:09:09,933 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:09,933 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:09,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-12-14 10:09:10,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:10,134 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:09:10,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:10,134 INFO L85 PathProgramCache]: Analyzing trace with hash -908906999, now seen corresponding path program 1 times [2022-12-14 10:09:10,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:09:10,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780211342] [2022-12-14 10:09:10,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:10,135 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:10,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:09:10,136 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:09:10,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-12-14 10:09:10,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:10,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 10:09:10,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:10,183 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 10:09:10,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:09:10,184 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:09:10,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780211342] [2022-12-14 10:09:10,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780211342] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:09:10,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:09:10,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:09:10,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731711136] [2022-12-14 10:09:10,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:09:10,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:09:10,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:09:10,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:09:10,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:09:10,185 INFO L87 Difference]: Start difference. First operand 166 states and 219 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 10:09:10,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:10,261 INFO L93 Difference]: Finished difference Result 239 states and 312 transitions. [2022-12-14 10:09:10,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:09:10,261 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2022-12-14 10:09:10,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:10,262 INFO L225 Difference]: With dead ends: 239 [2022-12-14 10:09:10,262 INFO L226 Difference]: Without dead ends: 212 [2022-12-14 10:09:10,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:09:10,264 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 113 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:10,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 257 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:09:10,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-12-14 10:09:10,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 166. [2022-12-14 10:09:10,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 144 states have (on average 1.2847222222222223) internal successors, (185), 147 states have internal predecessors, (185), 15 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (18), 16 states have call predecessors, (18), 14 states have call successors, (18) [2022-12-14 10:09:10,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 218 transitions. [2022-12-14 10:09:10,282 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 218 transitions. Word has length 49 [2022-12-14 10:09:10,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:10,282 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 218 transitions. [2022-12-14 10:09:10,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 10:09:10,282 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 218 transitions. [2022-12-14 10:09:10,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 10:09:10,283 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:10,283 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:10,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-12-14 10:09:10,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:10,484 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:09:10,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:10,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1552744902, now seen corresponding path program 1 times [2022-12-14 10:09:10,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:09:10,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1236532495] [2022-12-14 10:09:10,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:10,485 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:10,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:09:10,485 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:09:10,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-14 10:09:10,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:10,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 10:09:10,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:10,576 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 10:09:10,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:09:10,576 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:09:10,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1236532495] [2022-12-14 10:09:10,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1236532495] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:09:10,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:09:10,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 10:09:10,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466753848] [2022-12-14 10:09:10,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:09:10,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 10:09:10,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:09:10,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 10:09:10,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:09:10,578 INFO L87 Difference]: Start difference. First operand 166 states and 218 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 10:09:10,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:10,798 INFO L93 Difference]: Finished difference Result 270 states and 370 transitions. [2022-12-14 10:09:10,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 10:09:10,798 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-12-14 10:09:10,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:10,799 INFO L225 Difference]: With dead ends: 270 [2022-12-14 10:09:10,799 INFO L226 Difference]: Without dead ends: 246 [2022-12-14 10:09:10,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-12-14 10:09:10,800 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 177 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:10,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 574 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:09:10,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-12-14 10:09:10,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 199. [2022-12-14 10:09:10,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 173 states have (on average 1.283236994219653) internal successors, (222), 177 states have internal predecessors, (222), 19 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (22), 20 states have call predecessors, (22), 18 states have call successors, (22) [2022-12-14 10:09:10,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 263 transitions. [2022-12-14 10:09:10,817 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 263 transitions. Word has length 50 [2022-12-14 10:09:10,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:10,817 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 263 transitions. [2022-12-14 10:09:10,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 10:09:10,818 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 263 transitions. [2022-12-14 10:09:10,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 10:09:10,818 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:10,818 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:10,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-12-14 10:09:11,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:11,020 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:09:11,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:11,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1182826734, now seen corresponding path program 1 times [2022-12-14 10:09:11,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:09:11,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1161878422] [2022-12-14 10:09:11,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:11,022 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:11,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:09:11,025 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:09:11,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-12-14 10:09:11,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:11,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:09:11,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:11,181 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 10:09:11,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:09:11,182 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:09:11,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1161878422] [2022-12-14 10:09:11,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1161878422] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:09:11,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:09:11,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:09:11,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228048380] [2022-12-14 10:09:11,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:09:11,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:09:11,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:09:11,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:09:11,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:09:11,183 INFO L87 Difference]: Start difference. First operand 199 states and 263 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 10:09:11,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:11,219 INFO L93 Difference]: Finished difference Result 241 states and 312 transitions. [2022-12-14 10:09:11,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:09:11,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-12-14 10:09:11,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:11,221 INFO L225 Difference]: With dead ends: 241 [2022-12-14 10:09:11,221 INFO L226 Difference]: Without dead ends: 207 [2022-12-14 10:09:11,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:09:11,222 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 87 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:11,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 230 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:09:11,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-12-14 10:09:11,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 199. [2022-12-14 10:09:11,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 173 states have (on average 1.2138728323699421) internal successors, (210), 177 states have internal predecessors, (210), 19 states have call successors, (19), 4 states have call predecessors, (19), 6 states have return successors, (22), 20 states have call predecessors, (22), 18 states have call successors, (22) [2022-12-14 10:09:11,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 251 transitions. [2022-12-14 10:09:11,241 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 251 transitions. Word has length 50 [2022-12-14 10:09:11,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:11,241 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 251 transitions. [2022-12-14 10:09:11,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 10:09:11,241 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 251 transitions. [2022-12-14 10:09:11,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 10:09:11,242 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:11,242 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:11,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-12-14 10:09:11,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:11,443 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:09:11,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:11,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1332385442, now seen corresponding path program 1 times [2022-12-14 10:09:11,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:09:11,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [211106929] [2022-12-14 10:09:11,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:11,446 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:11,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:09:11,449 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:09:11,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-12-14 10:09:11,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:11,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:09:11,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:11,502 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 10:09:11,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:09:11,502 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:09:11,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [211106929] [2022-12-14 10:09:11,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [211106929] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:09:11,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:09:11,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:09:11,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138753233] [2022-12-14 10:09:11,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:09:11,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:09:11,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:09:11,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:09:11,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:09:11,504 INFO L87 Difference]: Start difference. First operand 199 states and 251 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 10:09:11,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:11,541 INFO L93 Difference]: Finished difference Result 208 states and 259 transitions. [2022-12-14 10:09:11,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:09:11,542 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2022-12-14 10:09:11,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:11,543 INFO L225 Difference]: With dead ends: 208 [2022-12-14 10:09:11,543 INFO L226 Difference]: Without dead ends: 167 [2022-12-14 10:09:11,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:09:11,544 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 1 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:11,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 279 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:09:11,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-12-14 10:09:11,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 161. [2022-12-14 10:09:11,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 138 states have (on average 1.2246376811594204) internal successors, (169), 143 states have internal predecessors, (169), 16 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (16), 15 states have call predecessors, (16), 14 states have call successors, (16) [2022-12-14 10:09:11,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 201 transitions. [2022-12-14 10:09:11,558 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 201 transitions. Word has length 52 [2022-12-14 10:09:11,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:11,559 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 201 transitions. [2022-12-14 10:09:11,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 10:09:11,559 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 201 transitions. [2022-12-14 10:09:11,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 10:09:11,559 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:11,559 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:11,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-12-14 10:09:11,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:11,760 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:09:11,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:11,760 INFO L85 PathProgramCache]: Analyzing trace with hash -444512686, now seen corresponding path program 1 times [2022-12-14 10:09:11,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:09:11,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1740568723] [2022-12-14 10:09:11,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:11,761 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:11,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:09:11,762 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:09:11,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-12-14 10:09:11,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:11,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 10:09:11,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:11,836 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 10:09:11,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:09:11,836 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:09:11,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1740568723] [2022-12-14 10:09:11,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1740568723] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:09:11,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:09:11,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 10:09:11,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12147492] [2022-12-14 10:09:11,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:09:11,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:09:11,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:09:11,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:09:11,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:09:11,838 INFO L87 Difference]: Start difference. First operand 161 states and 201 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 10:09:11,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:11,993 INFO L93 Difference]: Finished difference Result 234 states and 301 transitions. [2022-12-14 10:09:11,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 10:09:11,993 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2022-12-14 10:09:11,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:11,994 INFO L225 Difference]: With dead ends: 234 [2022-12-14 10:09:11,994 INFO L226 Difference]: Without dead ends: 185 [2022-12-14 10:09:11,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-12-14 10:09:11,995 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 87 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:11,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 508 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:09:11,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-12-14 10:09:12,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 135. [2022-12-14 10:09:12,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 112 states have (on average 1.25) internal successors, (140), 117 states have internal predecessors, (140), 17 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-12-14 10:09:12,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 172 transitions. [2022-12-14 10:09:12,010 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 172 transitions. Word has length 52 [2022-12-14 10:09:12,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:12,010 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 172 transitions. [2022-12-14 10:09:12,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 10:09:12,010 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 172 transitions. [2022-12-14 10:09:12,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 10:09:12,011 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:12,011 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:12,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-12-14 10:09:12,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:12,212 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:09:12,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:12,212 INFO L85 PathProgramCache]: Analyzing trace with hash -71376074, now seen corresponding path program 1 times [2022-12-14 10:09:12,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:09:12,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2096706922] [2022-12-14 10:09:12,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:12,213 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:12,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:09:12,214 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:09:12,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-14 10:09:12,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:12,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 10:09:12,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:12,469 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 10:09:12,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:09:12,470 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:09:12,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2096706922] [2022-12-14 10:09:12,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2096706922] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:09:12,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:09:12,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 10:09:12,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998709421] [2022-12-14 10:09:12,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:09:12,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 10:09:12,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:09:12,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 10:09:12,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:09:12,471 INFO L87 Difference]: Start difference. First operand 135 states and 172 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 10:09:12,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:12,628 INFO L93 Difference]: Finished difference Result 181 states and 232 transitions. [2022-12-14 10:09:12,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 10:09:12,628 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2022-12-14 10:09:12,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:12,629 INFO L225 Difference]: With dead ends: 181 [2022-12-14 10:09:12,629 INFO L226 Difference]: Without dead ends: 179 [2022-12-14 10:09:12,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-12-14 10:09:12,630 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 64 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:12,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 461 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:09:12,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-12-14 10:09:12,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 141. [2022-12-14 10:09:12,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 115 states have (on average 1.2434782608695651) internal successors, (143), 122 states have internal predecessors, (143), 19 states have call successors, (19), 5 states have call predecessors, (19), 6 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2022-12-14 10:09:12,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 179 transitions. [2022-12-14 10:09:12,647 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 179 transitions. Word has length 54 [2022-12-14 10:09:12,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:12,648 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 179 transitions. [2022-12-14 10:09:12,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 10:09:12,648 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 179 transitions. [2022-12-14 10:09:12,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 10:09:12,649 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:12,649 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:12,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-12-14 10:09:12,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:12,850 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:09:12,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:12,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1768875186, now seen corresponding path program 1 times [2022-12-14 10:09:12,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:09:12,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [422481471] [2022-12-14 10:09:12,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:12,851 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:12,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:09:12,853 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:09:12,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-12-14 10:09:12,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:12,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 10:09:12,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:17,314 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 10:09:17,315 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:09:17,315 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:09:17,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [422481471] [2022-12-14 10:09:17,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [422481471] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:09:17,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:09:17,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 10:09:17,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146243148] [2022-12-14 10:09:17,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:09:17,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 10:09:17,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:09:17,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 10:09:17,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=38, Unknown=2, NotChecked=0, Total=56 [2022-12-14 10:09:17,316 INFO L87 Difference]: Start difference. First operand 141 states and 179 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 10:09:19,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:09:21,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:09:23,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:09:25,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:09:27,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:09:29,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:09:31,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:09:33,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:09:35,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:09:37,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:09:39,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:09:41,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:09:43,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:09:45,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:09:47,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:09:49,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:09:51,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:09:55,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:09:55,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:55,832 INFO L93 Difference]: Finished difference Result 185 states and 235 transitions. [2022-12-14 10:09:55,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 10:09:55,834 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2022-12-14 10:09:55,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:55,834 INFO L225 Difference]: With dead ends: 185 [2022-12-14 10:09:55,834 INFO L226 Difference]: Without dead ends: 183 [2022-12-14 10:09:55,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=25, Invalid=63, Unknown=2, NotChecked=0, Total=90 [2022-12-14 10:09:55,835 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 67 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:55,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 469 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 18 Unknown, 0 Unchecked, 36.4s Time] [2022-12-14 10:09:55,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-12-14 10:09:55,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 139. [2022-12-14 10:09:55,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 115 states have (on average 1.2434782608695651) internal successors, (143), 120 states have internal predecessors, (143), 17 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-12-14 10:09:55,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 175 transitions. [2022-12-14 10:09:55,849 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 175 transitions. Word has length 55 [2022-12-14 10:09:55,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:55,850 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 175 transitions. [2022-12-14 10:09:55,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 10:09:55,850 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 175 transitions. [2022-12-14 10:09:55,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 10:09:55,850 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:55,850 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:55,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-12-14 10:09:56,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:56,052 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:09:56,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:56,053 INFO L85 PathProgramCache]: Analyzing trace with hash -2067393215, now seen corresponding path program 1 times [2022-12-14 10:09:56,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:09:56,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900332307] [2022-12-14 10:09:56,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:56,054 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:56,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:09:56,057 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:09:56,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-12-14 10:09:56,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:56,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 10:09:56,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:56,634 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 10:09:56,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:09:56,634 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:09:56,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900332307] [2022-12-14 10:09:56,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900332307] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:09:56,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:09:56,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-14 10:09:56,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681647462] [2022-12-14 10:09:56,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:09:56,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 10:09:56,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:09:56,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 10:09:56,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-12-14 10:09:56,635 INFO L87 Difference]: Start difference. First operand 139 states and 175 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 10:09:58,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:58,173 INFO L93 Difference]: Finished difference Result 201 states and 256 transitions. [2022-12-14 10:09:58,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 10:09:58,174 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2022-12-14 10:09:58,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:58,175 INFO L225 Difference]: With dead ends: 201 [2022-12-14 10:09:58,175 INFO L226 Difference]: Without dead ends: 189 [2022-12-14 10:09:58,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-12-14 10:09:58,176 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 164 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:58,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 914 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 10:09:58,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-12-14 10:09:58,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 139. [2022-12-14 10:09:58,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 115 states have (on average 1.2260869565217392) internal successors, (141), 120 states have internal predecessors, (141), 17 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-12-14 10:09:58,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 173 transitions. [2022-12-14 10:09:58,197 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 173 transitions. Word has length 58 [2022-12-14 10:09:58,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:58,198 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 173 transitions. [2022-12-14 10:09:58,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 10:09:58,198 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 173 transitions. [2022-12-14 10:09:58,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-14 10:09:58,198 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:58,198 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:58,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-12-14 10:09:58,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:58,399 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:09:58,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:58,400 INFO L85 PathProgramCache]: Analyzing trace with hash 589240327, now seen corresponding path program 1 times [2022-12-14 10:09:58,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:09:58,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [884543816] [2022-12-14 10:09:58,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:58,402 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:58,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:09:58,404 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:09:58,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-12-14 10:09:58,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:58,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 10:09:58,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:58,574 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 10:09:58,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:09:58,575 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:09:58,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [884543816] [2022-12-14 10:09:58,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [884543816] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:09:58,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:09:58,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 10:09:58,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639287520] [2022-12-14 10:09:58,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:09:58,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:09:58,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:09:58,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:09:58,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:09:58,576 INFO L87 Difference]: Start difference. First operand 139 states and 173 transitions. Second operand has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 10:09:58,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:58,648 INFO L93 Difference]: Finished difference Result 158 states and 193 transitions. [2022-12-14 10:09:58,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 10:09:58,648 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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 60 [2022-12-14 10:09:58,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:58,649 INFO L225 Difference]: With dead ends: 158 [2022-12-14 10:09:58,649 INFO L226 Difference]: Without dead ends: 156 [2022-12-14 10:09:58,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:09:58,650 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 40 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:58,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 484 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:09:58,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-12-14 10:09:58,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 143. [2022-12-14 10:09:58,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 118 states have (on average 1.2203389830508475) internal successors, (144), 123 states have internal predecessors, (144), 17 states have call successors, (17), 6 states have call predecessors, (17), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-12-14 10:09:58,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 176 transitions. [2022-12-14 10:09:58,668 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 176 transitions. Word has length 60 [2022-12-14 10:09:58,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:58,668 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 176 transitions. [2022-12-14 10:09:58,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 10:09:58,668 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 176 transitions. [2022-12-14 10:09:58,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-14 10:09:58,669 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:58,669 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:58,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-12-14 10:09:58,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:58,869 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:09:58,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:58,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1364362596, now seen corresponding path program 1 times [2022-12-14 10:09:58,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:09:58,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1591380680] [2022-12-14 10:09:58,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:58,870 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:58,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:09:58,871 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:09:58,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-12-14 10:09:58,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:58,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 10:09:58,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:59,327 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 10:09:59,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:09:59,327 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:09:59,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1591380680] [2022-12-14 10:09:59,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1591380680] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:09:59,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:09:59,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-12-14 10:09:59,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028516123] [2022-12-14 10:09:59,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:09:59,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 10:09:59,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:09:59,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 10:09:59,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-12-14 10:09:59,328 INFO L87 Difference]: Start difference. First operand 143 states and 176 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 10:10:02,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:10:02,354 INFO L93 Difference]: Finished difference Result 371 states and 485 transitions. [2022-12-14 10:10:02,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 10:10:02,355 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2022-12-14 10:10:02,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:10:02,356 INFO L225 Difference]: With dead ends: 371 [2022-12-14 10:10:02,356 INFO L226 Difference]: Without dead ends: 339 [2022-12-14 10:10:02,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-12-14 10:10:02,357 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 428 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:10:02,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 1048 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-14 10:10:02,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-12-14 10:10:02,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 169. [2022-12-14 10:10:02,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 141 states have (on average 1.2056737588652482) internal successors, (170), 147 states have internal predecessors, (170), 20 states have call successors, (20), 6 states have call predecessors, (20), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-12-14 10:10:02,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 208 transitions. [2022-12-14 10:10:02,384 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 208 transitions. Word has length 60 [2022-12-14 10:10:02,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:10:02,384 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 208 transitions. [2022-12-14 10:10:02,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 10:10:02,384 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 208 transitions. [2022-12-14 10:10:02,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-14 10:10:02,385 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:10:02,385 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:10:02,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-12-14 10:10:02,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:10:02,586 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:10:02,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:10:02,586 INFO L85 PathProgramCache]: Analyzing trace with hash 865353347, now seen corresponding path program 1 times [2022-12-14 10:10:02,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:10:02,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89081696] [2022-12-14 10:10:02,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:10:02,587 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:10:02,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:10:02,587 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:10:02,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-12-14 10:10:02,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:10:02,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 10:10:02,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:10:02,668 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 10:10:02,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:10:02,669 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:10:02,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [89081696] [2022-12-14 10:10:02,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [89081696] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:10:02,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:10:02,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 10:10:02,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864966335] [2022-12-14 10:10:02,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:10:02,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:10:02,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:10:02,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:10:02,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:10:02,670 INFO L87 Difference]: Start difference. First operand 169 states and 208 transitions. Second operand has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 10:10:02,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:10:02,775 INFO L93 Difference]: Finished difference Result 191 states and 234 transitions. [2022-12-14 10:10:02,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 10:10:02,776 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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 60 [2022-12-14 10:10:02,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:10:02,777 INFO L225 Difference]: With dead ends: 191 [2022-12-14 10:10:02,777 INFO L226 Difference]: Without dead ends: 189 [2022-12-14 10:10:02,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:10:02,778 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 34 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:10:02,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 480 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:10:02,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-12-14 10:10:02,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 174. [2022-12-14 10:10:02,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 144 states have (on average 1.2013888888888888) internal successors, (173), 151 states have internal predecessors, (173), 21 states have call successors, (21), 7 states have call predecessors, (21), 8 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-12-14 10:10:02,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 213 transitions. [2022-12-14 10:10:02,804 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 213 transitions. Word has length 60 [2022-12-14 10:10:02,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:10:02,804 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 213 transitions. [2022-12-14 10:10:02,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 10:10:02,804 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 213 transitions. [2022-12-14 10:10:02,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-14 10:10:02,805 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:10:02,805 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:10:02,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-12-14 10:10:03,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:10:03,005 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:10:03,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:10:03,006 INFO L85 PathProgramCache]: Analyzing trace with hash 921322142, now seen corresponding path program 1 times [2022-12-14 10:10:03,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:10:03,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1330447449] [2022-12-14 10:10:03,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:10:03,006 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:10:03,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:10:03,007 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:10:03,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-12-14 10:10:03,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:10:03,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 10:10:03,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:10:03,865 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 10:10:03,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:10:03,866 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:10:03,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1330447449] [2022-12-14 10:10:03,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1330447449] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:10:03,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:10:03,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-14 10:10:03,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121863014] [2022-12-14 10:10:03,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:10:03,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 10:10:03,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:10:03,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 10:10:03,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-12-14 10:10:03,867 INFO L87 Difference]: Start difference. First operand 174 states and 213 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 10:10:10,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:10:10,594 INFO L93 Difference]: Finished difference Result 315 states and 396 transitions. [2022-12-14 10:10:10,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 10:10:10,595 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 65 [2022-12-14 10:10:10,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:10:10,596 INFO L225 Difference]: With dead ends: 315 [2022-12-14 10:10:10,596 INFO L226 Difference]: Without dead ends: 289 [2022-12-14 10:10:10,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-12-14 10:10:10,597 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 286 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:10:10,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 1089 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-12-14 10:10:10,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-12-14 10:10:10,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 203. [2022-12-14 10:10:10,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 169 states have (on average 1.2011834319526626) internal successors, (203), 176 states have internal predecessors, (203), 25 states have call successors, (25), 7 states have call predecessors, (25), 8 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-12-14 10:10:10,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 251 transitions. [2022-12-14 10:10:10,636 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 251 transitions. Word has length 65 [2022-12-14 10:10:10,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:10:10,636 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 251 transitions. [2022-12-14 10:10:10,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 10:10:10,636 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 251 transitions. [2022-12-14 10:10:10,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-14 10:10:10,637 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:10:10,637 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:10:10,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-12-14 10:10:10,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:10:10,838 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:10:10,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:10:10,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1450417120, now seen corresponding path program 1 times [2022-12-14 10:10:10,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:10:10,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [926595530] [2022-12-14 10:10:10,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:10:10,840 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:10:10,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:10:10,843 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:10:10,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-12-14 10:10:10,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:10:10,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 10:10:10,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:10:11,388 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 10:10:11,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:10:11,388 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:10:11,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [926595530] [2022-12-14 10:10:11,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [926595530] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:10:11,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:10:11,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-14 10:10:11,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620599673] [2022-12-14 10:10:11,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:10:11,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 10:10:11,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:10:11,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 10:10:11,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-14 10:10:11,389 INFO L87 Difference]: Start difference. First operand 203 states and 251 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 10:10:14,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 10:10:15,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:10:15,685 INFO L93 Difference]: Finished difference Result 342 states and 435 transitions. [2022-12-14 10:10:15,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 10:10:15,686 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 65 [2022-12-14 10:10:15,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:10:15,688 INFO L225 Difference]: With dead ends: 342 [2022-12-14 10:10:15,688 INFO L226 Difference]: Without dead ends: 319 [2022-12-14 10:10:15,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2022-12-14 10:10:15,689 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 251 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:10:15,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 648 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 311 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2022-12-14 10:10:15,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-12-14 10:10:15,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 206. [2022-12-14 10:10:15,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 171 states have (on average 1.2046783625730995) internal successors, (206), 179 states have internal predecessors, (206), 26 states have call successors, (26), 7 states have call predecessors, (26), 8 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-12-14 10:10:15,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 256 transitions. [2022-12-14 10:10:15,733 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 256 transitions. Word has length 65 [2022-12-14 10:10:15,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:10:15,733 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 256 transitions. [2022-12-14 10:10:15,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 10:10:15,733 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 256 transitions. [2022-12-14 10:10:15,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-14 10:10:15,733 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:10:15,733 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:10:15,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-12-14 10:10:15,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:10:15,935 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:10:15,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:10:15,936 INFO L85 PathProgramCache]: Analyzing trace with hash -957629534, now seen corresponding path program 1 times [2022-12-14 10:10:15,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:10:15,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1574125588] [2022-12-14 10:10:15,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:10:15,938 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:10:15,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:10:15,941 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:10:15,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-12-14 10:10:16,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:10:16,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 10:10:16,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:10:17,226 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 10:10:17,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:10:17,517 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:10:17,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1574125588] [2022-12-14 10:10:17,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1574125588] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:10:17,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [993416859] [2022-12-14 10:10:17,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:10:17,518 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:10:17,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:10:17,519 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:10:17,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-12-14 10:10:17,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:10:17,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 10:10:17,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:10:19,539 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 10:10:19,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:10:19,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [993416859] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:10:19,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933850088] [2022-12-14 10:10:19,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:10:19,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:10:19,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:10:19,563 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:10:19,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-14 10:10:19,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:10:19,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 10:10:19,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:10:20,274 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 10:10:20,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:10:20,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933850088] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:10:20,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:10:20,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 22 [2022-12-14 10:10:20,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472982501] [2022-12-14 10:10:20,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:10:20,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 10:10:20,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:10:20,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 10:10:20,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-12-14 10:10:20,303 INFO L87 Difference]: Start difference. First operand 206 states and 256 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-14 10:10:29,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:10:29,927 INFO L93 Difference]: Finished difference Result 324 states and 405 transitions. [2022-12-14 10:10:29,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 10:10:29,930 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 66 [2022-12-14 10:10:29,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:10:29,931 INFO L225 Difference]: With dead ends: 324 [2022-12-14 10:10:29,931 INFO L226 Difference]: Without dead ends: 298 [2022-12-14 10:10:29,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 197 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 10:10:29,932 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 506 mSDsluCounter, 1371 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 1495 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:10:29,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 1495 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-12-14 10:10:29,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-12-14 10:10:29,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 213. [2022-12-14 10:10:29,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 178 states have (on average 1.2134831460674158) internal successors, (216), 185 states have internal predecessors, (216), 26 states have call successors, (26), 7 states have call predecessors, (26), 8 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-12-14 10:10:29,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 266 transitions. [2022-12-14 10:10:29,980 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 266 transitions. Word has length 66 [2022-12-14 10:10:29,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:10:29,980 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 266 transitions. [2022-12-14 10:10:29,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-14 10:10:29,980 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 266 transitions. [2022-12-14 10:10:29,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-14 10:10:29,981 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:10:29,981 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:10:29,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2022-12-14 10:10:30,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-14 10:10:30,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-12-14 10:10:30,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:10:30,584 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:10:30,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:10:30,585 INFO L85 PathProgramCache]: Analyzing trace with hash -660447408, now seen corresponding path program 1 times [2022-12-14 10:10:30,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:10:30,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [732105229] [2022-12-14 10:10:30,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:10:30,586 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:10:30,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:10:30,589 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:10:30,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-12-14 10:10:30,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:10:30,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 10:10:30,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:10:31,329 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 10:10:31,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:10:31,329 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:10:31,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [732105229] [2022-12-14 10:10:31,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [732105229] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:10:31,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:10:31,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-12-14 10:10:31,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857940386] [2022-12-14 10:10:31,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:10:31,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 10:10:31,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:10:31,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 10:10:31,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-12-14 10:10:31,331 INFO L87 Difference]: Start difference. First operand 213 states and 266 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 10:10:33,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:10:33,134 INFO L93 Difference]: Finished difference Result 279 states and 347 transitions. [2022-12-14 10:10:33,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 10:10:33,135 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 66 [2022-12-14 10:10:33,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:10:33,136 INFO L225 Difference]: With dead ends: 279 [2022-12-14 10:10:33,136 INFO L226 Difference]: Without dead ends: 271 [2022-12-14 10:10:33,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-12-14 10:10:33,137 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 118 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:10:33,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 874 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 10:10:33,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-12-14 10:10:33,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 217. [2022-12-14 10:10:33,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 181 states have (on average 1.2099447513812154) internal successors, (219), 188 states have internal predecessors, (219), 27 states have call successors, (27), 7 states have call predecessors, (27), 8 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2022-12-14 10:10:33,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 271 transitions. [2022-12-14 10:10:33,188 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 271 transitions. Word has length 66 [2022-12-14 10:10:33,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:10:33,188 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 271 transitions. [2022-12-14 10:10:33,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 10:10:33,188 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 271 transitions. [2022-12-14 10:10:33,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-14 10:10:33,188 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:10:33,189 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:10:33,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-12-14 10:10:33,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:10:33,390 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:10:33,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:10:33,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1467102624, now seen corresponding path program 1 times [2022-12-14 10:10:33,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:10:33,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1245836979] [2022-12-14 10:10:33,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:10:33,393 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:10:33,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:10:33,396 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:10:33,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-12-14 10:10:33,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:10:33,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 10:10:33,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:10:33,743 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 10:10:33,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:10:33,743 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:10:33,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1245836979] [2022-12-14 10:10:33,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1245836979] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:10:33,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:10:33,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 10:10:33,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110159976] [2022-12-14 10:10:33,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:10:33,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 10:10:33,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:10:33,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 10:10:33,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:10:33,744 INFO L87 Difference]: Start difference. First operand 217 states and 271 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 10:10:34,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:10:34,418 INFO L93 Difference]: Finished difference Result 293 states and 360 transitions. [2022-12-14 10:10:34,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 10:10:34,419 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 66 [2022-12-14 10:10:34,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:10:34,420 INFO L225 Difference]: With dead ends: 293 [2022-12-14 10:10:34,420 INFO L226 Difference]: Without dead ends: 267 [2022-12-14 10:10:34,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-12-14 10:10:34,421 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 182 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:10:34,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 709 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 10:10:34,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-12-14 10:10:34,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 177. [2022-12-14 10:10:34,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 148 states have (on average 1.1824324324324325) internal successors, (175), 154 states have internal predecessors, (175), 20 states have call successors, (20), 7 states have call predecessors, (20), 8 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-12-14 10:10:34,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 213 transitions. [2022-12-14 10:10:34,464 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 213 transitions. Word has length 66 [2022-12-14 10:10:34,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:10:34,464 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 213 transitions. [2022-12-14 10:10:34,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 10:10:34,464 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 213 transitions. [2022-12-14 10:10:34,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-14 10:10:34,465 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:10:34,465 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:10:34,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-12-14 10:10:34,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:10:34,666 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:10:34,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:10:34,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1151744600, now seen corresponding path program 1 times [2022-12-14 10:10:34,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:10:34,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1522660649] [2022-12-14 10:10:34,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:10:34,669 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:10:34,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:10:34,671 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:10:34,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-12-14 10:10:34,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:10:34,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 10:10:34,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:10:34,799 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 10:10:34,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:10:34,799 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:10:34,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1522660649] [2022-12-14 10:10:34,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1522660649] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:10:34,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:10:34,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 10:10:34,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676744499] [2022-12-14 10:10:34,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:10:34,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:10:34,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:10:34,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:10:34,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:10:34,800 INFO L87 Difference]: Start difference. First operand 177 states and 213 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-14 10:10:34,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:10:34,919 INFO L93 Difference]: Finished difference Result 207 states and 245 transitions. [2022-12-14 10:10:34,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 10:10:34,919 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 68 [2022-12-14 10:10:34,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:10:34,920 INFO L225 Difference]: With dead ends: 207 [2022-12-14 10:10:34,920 INFO L226 Difference]: Without dead ends: 193 [2022-12-14 10:10:34,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:10:34,921 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 28 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:10:34,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 458 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:10:34,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-12-14 10:10:34,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 171. [2022-12-14 10:10:34,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 141 states have (on average 1.177304964539007) internal successors, (166), 149 states have internal predecessors, (166), 20 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-12-14 10:10:34,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 204 transitions. [2022-12-14 10:10:34,961 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 204 transitions. Word has length 68 [2022-12-14 10:10:34,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:10:34,962 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 204 transitions. [2022-12-14 10:10:34,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-14 10:10:34,962 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 204 transitions. [2022-12-14 10:10:34,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-14 10:10:34,962 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:10:34,962 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:10:34,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-12-14 10:10:35,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:10:35,164 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:10:35,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:10:35,165 INFO L85 PathProgramCache]: Analyzing trace with hash 106001302, now seen corresponding path program 1 times [2022-12-14 10:10:35,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:10:35,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1858760835] [2022-12-14 10:10:35,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:10:35,166 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:10:35,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:10:35,169 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:10:35,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-12-14 10:10:35,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:10:35,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 10:10:35,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:10:35,288 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 10:10:35,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:10:35,288 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:10:35,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1858760835] [2022-12-14 10:10:35,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1858760835] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:10:35,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:10:35,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 10:10:35,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341254909] [2022-12-14 10:10:35,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:10:35,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:10:35,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:10:35,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:10:35,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:10:35,294 INFO L87 Difference]: Start difference. First operand 171 states and 204 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-14 10:10:35,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:10:35,416 INFO L93 Difference]: Finished difference Result 197 states and 231 transitions. [2022-12-14 10:10:35,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 10:10:35,416 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 68 [2022-12-14 10:10:35,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:10:35,418 INFO L225 Difference]: With dead ends: 197 [2022-12-14 10:10:35,418 INFO L226 Difference]: Without dead ends: 183 [2022-12-14 10:10:35,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:10:35,419 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 28 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:10:35,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 458 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:10:35,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-12-14 10:10:35,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 157. [2022-12-14 10:10:35,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 129 states have (on average 1.1705426356589148) internal successors, (151), 136 states have internal predecessors, (151), 18 states have call successors, (18), 8 states have call predecessors, (18), 9 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-12-14 10:10:35,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 185 transitions. [2022-12-14 10:10:35,469 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 185 transitions. Word has length 68 [2022-12-14 10:10:35,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:10:35,469 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 185 transitions. [2022-12-14 10:10:35,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-14 10:10:35,469 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 185 transitions. [2022-12-14 10:10:35,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-14 10:10:35,470 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:10:35,470 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:10:35,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-12-14 10:10:35,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:10:35,671 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:10:35,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:10:35,671 INFO L85 PathProgramCache]: Analyzing trace with hash -550644062, now seen corresponding path program 1 times [2022-12-14 10:10:35,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:10:35,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [316314658] [2022-12-14 10:10:35,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:10:35,672 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:10:35,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:10:35,673 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:10:35,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-12-14 10:10:35,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:10:35,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:10:35,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:10:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 10:10:35,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:10:35,751 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:10:35,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [316314658] [2022-12-14 10:10:35,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [316314658] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:10:35,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:10:35,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:10:35,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244320713] [2022-12-14 10:10:35,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:10:35,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:10:35,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:10:35,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:10:35,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:10:35,753 INFO L87 Difference]: Start difference. First operand 157 states and 185 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 10:10:35,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:10:35,853 INFO L93 Difference]: Finished difference Result 185 states and 213 transitions. [2022-12-14 10:10:35,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:10:35,853 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2022-12-14 10:10:35,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:10:35,854 INFO L225 Difference]: With dead ends: 185 [2022-12-14 10:10:35,854 INFO L226 Difference]: Without dead ends: 136 [2022-12-14 10:10:35,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:10:35,854 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 43 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:10:35,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 244 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:10:35,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-12-14 10:10:35,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 128. [2022-12-14 10:10:35,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 108 states have (on average 1.1296296296296295) internal successors, (122), 111 states have internal predecessors, (122), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-14 10:10:35,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 146 transitions. [2022-12-14 10:10:35,884 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 146 transitions. Word has length 69 [2022-12-14 10:10:35,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:10:35,884 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 146 transitions. [2022-12-14 10:10:35,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 10:10:35,884 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 146 transitions. [2022-12-14 10:10:35,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-14 10:10:35,885 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:10:35,885 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:10:35,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-12-14 10:10:36,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:10:36,086 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:10:36,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:10:36,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1500339936, now seen corresponding path program 1 times [2022-12-14 10:10:36,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:10:36,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1063581937] [2022-12-14 10:10:36,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:10:36,089 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:10:36,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:10:36,092 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:10:36,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-12-14 10:10:36,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:10:36,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 10:10:36,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:10:36,276 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 10:10:36,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:10:36,430 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:10:36,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1063581937] [2022-12-14 10:10:36,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1063581937] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:10:36,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1785632160] [2022-12-14 10:10:36,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:10:36,430 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:10:36,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:10:36,431 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:10:36,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-12-14 10:10:36,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:10:36,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 10:10:36,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:10:36,597 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 10:10:36,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:10:36,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1785632160] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:10:36,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:10:36,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-12-14 10:10:36,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336916492] [2022-12-14 10:10:36,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:10:36,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:10:36,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:10:36,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:10:36,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2022-12-14 10:10:36,599 INFO L87 Difference]: Start difference. First operand 128 states and 146 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 10:10:36,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:10:36,866 INFO L93 Difference]: Finished difference Result 187 states and 208 transitions. [2022-12-14 10:10:36,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 10:10:36,868 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2022-12-14 10:10:36,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:10:36,868 INFO L225 Difference]: With dead ends: 187 [2022-12-14 10:10:36,868 INFO L226 Difference]: Without dead ends: 139 [2022-12-14 10:10:36,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-12-14 10:10:36,869 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 118 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:10:36,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 238 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:10:36,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-12-14 10:10:36,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 126. [2022-12-14 10:10:36,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 107 states have (on average 1.1214953271028036) internal successors, (120), 109 states have internal predecessors, (120), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 10:10:36,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 142 transitions. [2022-12-14 10:10:36,901 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 142 transitions. Word has length 69 [2022-12-14 10:10:36,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:10:36,901 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 142 transitions. [2022-12-14 10:10:36,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 10:10:36,901 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 142 transitions. [2022-12-14 10:10:36,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-14 10:10:36,901 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:10:36,901 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:10:36,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2022-12-14 10:10:37,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-12-14 10:10:37,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:10:37,304 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:10:37,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:10:37,305 INFO L85 PathProgramCache]: Analyzing trace with hash -2093027486, now seen corresponding path program 1 times [2022-12-14 10:10:37,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:10:37,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [15631155] [2022-12-14 10:10:37,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:10:37,306 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:10:37,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:10:37,307 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:10:37,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-12-14 10:10:37,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:10:37,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 10:10:37,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:10:37,563 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 10:10:37,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:10:37,817 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:10:37,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [15631155] [2022-12-14 10:10:37,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [15631155] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:10:37,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [814211673] [2022-12-14 10:10:37,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:10:37,818 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:10:37,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:10:37,818 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:10:37,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-12-14 10:10:37,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:10:37,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 10:10:37,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:10:37,896 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 10:10:37,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:10:37,965 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 10:10:37,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [814211673] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:10:37,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128781953] [2022-12-14 10:10:37,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:10:37,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:10:37,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:10:37,966 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:10:37,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-14 10:10:38,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:10:38,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 10:10:38,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:10:38,040 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 10:10:38,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:10:38,105 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 10:10:38,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128781953] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:10:38,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 5 imperfect interpolant sequences. [2022-12-14 10:10:38,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8, 8, 8] total 11 [2022-12-14 10:10:38,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852470065] [2022-12-14 10:10:38,106 INFO L85 oduleStraightlineAll]: Using 5 imperfect interpolants to construct interpolant automaton [2022-12-14 10:10:38,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 10:10:38,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:10:38,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 10:10:38,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-12-14 10:10:38,107 INFO L87 Difference]: Start difference. First operand 126 states and 142 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 10:10:38,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:10:38,295 INFO L93 Difference]: Finished difference Result 138 states and 151 transitions. [2022-12-14 10:10:38,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 10:10:38,296 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 69 [2022-12-14 10:10:38,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:10:38,296 INFO L225 Difference]: With dead ends: 138 [2022-12-14 10:10:38,296 INFO L226 Difference]: Without dead ends: 87 [2022-12-14 10:10:38,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 361 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-12-14 10:10:38,297 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 28 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:10:38,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 554 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:10:38,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-12-14 10:10:38,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-12-14 10:10:38,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 71 states have (on average 1.1267605633802817) internal successors, (80), 72 states have internal predecessors, (80), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 10:10:38,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2022-12-14 10:10:38,314 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 69 [2022-12-14 10:10:38,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:10:38,315 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2022-12-14 10:10:38,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 10:10:38,315 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2022-12-14 10:10:38,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 10:10:38,315 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:10:38,316 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:10:38,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-12-14 10:10:38,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-12-14 10:10:38,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2022-12-14 10:10:38,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 10:10:38,918 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:10:38,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:10:38,919 INFO L85 PathProgramCache]: Analyzing trace with hash 438339121, now seen corresponding path program 1 times [2022-12-14 10:10:38,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:10:38,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2049505170] [2022-12-14 10:10:38,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:10:38,921 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:10:38,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:10:38,922 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:10:38,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-12-14 10:10:38,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:10:39,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 10:10:39,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:10:39,476 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 10:10:39,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:10:39,476 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:10:39,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2049505170] [2022-12-14 10:10:39,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2049505170] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:10:39,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:10:39,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-14 10:10:39,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172347599] [2022-12-14 10:10:39,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:10:39,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 10:10:39,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:10:39,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 10:10:39,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-12-14 10:10:39,478 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 10:10:40,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:10:40,638 INFO L93 Difference]: Finished difference Result 116 states and 129 transitions. [2022-12-14 10:10:40,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 10:10:40,639 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 73 [2022-12-14 10:10:40,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:10:40,640 INFO L225 Difference]: With dead ends: 116 [2022-12-14 10:10:40,640 INFO L226 Difference]: Without dead ends: 100 [2022-12-14 10:10:40,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-12-14 10:10:40,640 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 58 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 10:10:40,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 512 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 10:10:40,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-12-14 10:10:40,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 87. [2022-12-14 10:10:40,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 72 states have internal predecessors, (79), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 10:10:40,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2022-12-14 10:10:40,656 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 73 [2022-12-14 10:10:40,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:10:40,656 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2022-12-14 10:10:40,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 10:10:40,656 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2022-12-14 10:10:40,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 10:10:40,657 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:10:40,657 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:10:40,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-12-14 10:10:40,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:10:40,857 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:10:40,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:10:40,858 INFO L85 PathProgramCache]: Analyzing trace with hash -405666381, now seen corresponding path program 1 times [2022-12-14 10:10:40,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:10:40,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [226364017] [2022-12-14 10:10:40,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:10:40,858 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:10:40,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:10:40,859 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:10:40,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-12-14 10:10:40,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:10:40,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 10:10:40,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:10:42,053 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 10:10:42,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:10:42,053 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:10:42,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [226364017] [2022-12-14 10:10:42,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [226364017] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:10:42,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:10:42,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-12-14 10:10:42,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32904902] [2022-12-14 10:10:42,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:10:42,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 10:10:42,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:10:42,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 10:10:42,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-12-14 10:10:42,055 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 10:10:45,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:10:45,247 INFO L93 Difference]: Finished difference Result 111 states and 123 transitions. [2022-12-14 10:10:45,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 10:10:45,248 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 73 [2022-12-14 10:10:45,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:10:45,249 INFO L225 Difference]: With dead ends: 111 [2022-12-14 10:10:45,249 INFO L226 Difference]: Without dead ends: 92 [2022-12-14 10:10:45,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-12-14 10:10:45,249 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 78 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:10:45,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 495 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 10:10:45,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-12-14 10:10:45,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 68. [2022-12-14 10:10:45,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 56 states have internal predecessors, (61), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 10:10:45,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2022-12-14 10:10:45,264 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 73 [2022-12-14 10:10:45,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:10:45,264 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2022-12-14 10:10:45,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 10:10:45,264 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2022-12-14 10:10:45,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 10:10:45,265 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:10:45,265 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:10:45,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-12-14 10:10:45,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:10:45,467 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:10:45,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:10:45,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1028998347, now seen corresponding path program 1 times [2022-12-14 10:10:45,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:10:45,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1470969037] [2022-12-14 10:10:45,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:10:45,470 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:10:45,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:10:45,473 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:10:45,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-12-14 10:10:45,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:10:45,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 10:10:45,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:10:46,047 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 10:10:46,047 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:10:46,047 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:10:46,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1470969037] [2022-12-14 10:10:46,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1470969037] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:10:46,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:10:46,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-12-14 10:10:46,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168583601] [2022-12-14 10:10:46,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:10:46,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 10:10:46,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:10:46,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 10:10:46,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-12-14 10:10:46,048 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 10:10:47,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:10:47,122 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2022-12-14 10:10:47,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 10:10:47,123 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 74 [2022-12-14 10:10:47,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:10:47,123 INFO L225 Difference]: With dead ends: 92 [2022-12-14 10:10:47,123 INFO L226 Difference]: Without dead ends: 68 [2022-12-14 10:10:47,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-12-14 10:10:47,123 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 64 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:10:47,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 563 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 10:10:47,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-12-14 10:10:47,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-12-14 10:10:47,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 56 states have internal predecessors, (60), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 10:10:47,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2022-12-14 10:10:47,136 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 74 [2022-12-14 10:10:47,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:10:47,136 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2022-12-14 10:10:47,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 10:10:47,136 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2022-12-14 10:10:47,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 10:10:47,136 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:10:47,136 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:10:47,143 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-12-14 10:10:47,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:10:47,337 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:10:47,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:10:47,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1423365133, now seen corresponding path program 1 times [2022-12-14 10:10:47,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:10:47,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [736169748] [2022-12-14 10:10:47,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:10:47,340 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:10:47,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:10:47,343 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:10:47,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-12-14 10:10:47,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:10:47,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 10:10:47,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:10:48,519 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 10:10:48,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:10:48,519 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:10:48,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [736169748] [2022-12-14 10:10:48,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [736169748] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:10:48,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:10:48,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-12-14 10:10:48,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762534791] [2022-12-14 10:10:48,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:10:48,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 10:10:48,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:10:48,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 10:10:48,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-12-14 10:10:48,520 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 10:10:50,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:10:50,696 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2022-12-14 10:10:50,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 10:10:50,698 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 74 [2022-12-14 10:10:50,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:10:50,698 INFO L225 Difference]: With dead ends: 68 [2022-12-14 10:10:50,698 INFO L226 Difference]: Without dead ends: 0 [2022-12-14 10:10:50,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2022-12-14 10:10:50,698 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 57 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 10:10:50,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 392 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 10:10:50,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-12-14 10:10:50,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-12-14 10:10:50,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:10:50,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-12-14 10:10:50,699 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 74 [2022-12-14 10:10:50,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:10:50,699 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-14 10:10:50,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 10:10:50,699 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-12-14 10:10:50,699 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-12-14 10:10:50,701 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 10:10:50,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-12-14 10:10:50,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a505c0ce-709a-4b45-bc85-76e4785090a1/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:10:50,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.