./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 44a691d0c7049cc6934dd4c9eebe75a3ba34b64a09862ea689fabb3c0e0e6b0c --- 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-8393723 [2022-11-18 18:49:54,928 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:49:54,931 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:49:54,959 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:49:54,961 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:49:54,964 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:49:54,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:49:54,970 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:49:54,974 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:49:54,977 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:49:54,979 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:49:54,981 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:49:54,982 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:49:54,987 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:49:54,988 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:49:54,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:49:54,993 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:49:54,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:49:54,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:49:55,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:49:55,002 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:49:55,003 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:49:55,006 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:49:55,007 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:49:55,015 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:49:55,017 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:49:55,017 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:49:55,018 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:49:55,020 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:49:55,021 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:49:55,022 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:49:55,023 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:49:55,025 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:49:55,027 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:49:55,028 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:49:55,029 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:49:55,029 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:49:55,030 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:49:55,030 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:49:55,031 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:49:55,032 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:49:55,032 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 18:49:55,066 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:49:55,070 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:49:55,071 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:49:55,071 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:49:55,072 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:49:55,079 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:49:55,080 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:49:55,080 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:49:55,081 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:49:55,081 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:49:55,082 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 18:49:55,083 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:49:55,083 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 18:49:55,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:49:55,083 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 18:49:55,084 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:49:55,084 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 18:49:55,084 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 18:49:55,085 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 18:49:55,085 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:49:55,085 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 18:49:55,086 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:49:55,086 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:49:55,086 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:49:55,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:49:55,087 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:49:55,087 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:49:55,087 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 18:49:55,088 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 18:49:55,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 18:49:55,088 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 18:49:55,089 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 18:49:55,089 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 18:49:55,089 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_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 44a691d0c7049cc6934dd4c9eebe75a3ba34b64a09862ea689fabb3c0e0e6b0c [2022-11-18 18:49:55,362 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:49:55,401 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:49:55,403 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:49:55,405 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:49:55,406 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:49:55,408 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c [2022-11-18 18:49:55,501 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/data/13b234d5d/933bc183a78643f3a9a46663f1b01482/FLAG9c775b8ef [2022-11-18 18:49:55,970 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:49:55,971 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c [2022-11-18 18:49:55,990 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/data/13b234d5d/933bc183a78643f3a9a46663f1b01482/FLAG9c775b8ef [2022-11-18 18:49:56,493 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/data/13b234d5d/933bc183a78643f3a9a46663f1b01482 [2022-11-18 18:49:56,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:49:56,497 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:49:56,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:49:56,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:49:56,504 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:49:56,504 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:49:56" (1/1) ... [2022-11-18 18:49:56,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@597cb4a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:49:56, skipping insertion in model container [2022-11-18 18:49:56,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:49:56" (1/1) ... [2022-11-18 18:49:56,516 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:49:56,562 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:49:56,737 WARN L234 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_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c[1995,2008] [2022-11-18 18:49:56,742 WARN L234 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_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c[2389,2402] [2022-11-18 18:49:56,787 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:49:56,796 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:49:56,810 WARN L234 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_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c[1995,2008] [2022-11-18 18:49:56,811 WARN L234 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_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c[2389,2402] [2022-11-18 18:49:56,847 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:49:56,861 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:49:56,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:49:56 WrapperNode [2022-11-18 18:49:56,862 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:49:56,863 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:49:56,863 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:49:56,863 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:49:56,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:49:56" (1/1) ... [2022-11-18 18:49:56,880 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:49:56" (1/1) ... [2022-11-18 18:49:56,900 INFO L138 Inliner]: procedures = 27, calls = 19, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2022-11-18 18:49:56,901 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:49:56,902 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:49:56,902 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:49:56,902 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:49:56,926 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:49:56" (1/1) ... [2022-11-18 18:49:56,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:49:56" (1/1) ... [2022-11-18 18:49:56,929 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:49:56" (1/1) ... [2022-11-18 18:49:56,929 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:49:56" (1/1) ... [2022-11-18 18:49:56,941 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:49:56" (1/1) ... [2022-11-18 18:49:56,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:49:56" (1/1) ... [2022-11-18 18:49:56,960 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:49:56" (1/1) ... [2022-11-18 18:49:56,967 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:49:56" (1/1) ... [2022-11-18 18:49:56,969 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:49:56,970 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:49:56,971 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:49:56,971 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:49:56,972 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:49:56" (1/1) ... [2022-11-18 18:49:56,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:49:56,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:49:57,011 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:49:57,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:49:57,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 18:49:57,049 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-11-18 18:49:57,050 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-11-18 18:49:57,050 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2022-11-18 18:49:57,050 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2022-11-18 18:49:57,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 18:49:57,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:49:57,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:49:57,050 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-18 18:49:57,051 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-18 18:49:57,121 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:49:57,123 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:49:57,617 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:49:57,630 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:49:57,630 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 18:49:57,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:49:57 BoogieIcfgContainer [2022-11-18 18:49:57,633 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:49:57,635 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:49:57,636 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:49:57,645 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:49:57,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:49:56" (1/3) ... [2022-11-18 18:49:57,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@271aba0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:49:57, skipping insertion in model container [2022-11-18 18:49:57,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:49:56" (2/3) ... [2022-11-18 18:49:57,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@271aba0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:49:57, skipping insertion in model container [2022-11-18 18:49:57,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:49:57" (3/3) ... [2022-11-18 18:49:57,649 INFO L112 eAbstractionObserver]: Analyzing ICFG square_7+soft_float_4-2a.c.cil.c [2022-11-18 18:49:57,668 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:49:57,669 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-18 18:49:57,738 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:49:57,745 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=PETRI_NET, 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;@47d0445c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:49:57,745 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:49:57,750 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 67 states have (on average 1.5970149253731343) internal successors, (107), 69 states have internal predecessors, (107), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-18 18:49:57,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 18:49:57,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:49:57,758 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:49:57,758 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:49:57,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:57,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1847035396, now seen corresponding path program 1 times [2022-11-18 18:49:57,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:49:57,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271284430] [2022-11-18 18:49:57,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:49:57,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:49:57,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:57,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:57,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:49:57,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271284430] [2022-11-18 18:49:57,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271284430] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:49:57,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:49:57,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:49:57,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135071148] [2022-11-18 18:49:57,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:49:57,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:49:57,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:49:57,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:49:57,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:49:57,956 INFO L87 Difference]: Start difference. First operand has 81 states, 67 states have (on average 1.5970149253731343) internal successors, (107), 69 states have internal predecessors, (107), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:57,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:49:57,999 INFO L93 Difference]: Finished difference Result 157 states and 246 transitions. [2022-11-18 18:49:58,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:49:58,001 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-18 18:49:58,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:49:58,022 INFO L225 Difference]: With dead ends: 157 [2022-11-18 18:49:58,022 INFO L226 Difference]: Without dead ends: 74 [2022-11-18 18:49:58,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:49:58,029 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:49:58,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:49:58,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-18 18:49:58,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-11-18 18:49:58,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 61 states have (on average 1.4754098360655739) internal successors, (90), 63 states have internal predecessors, (90), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-18 18:49:58,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 105 transitions. [2022-11-18 18:49:58,087 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 105 transitions. Word has length 7 [2022-11-18 18:49:58,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:49:58,088 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 105 transitions. [2022-11-18 18:49:58,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:58,089 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 105 transitions. [2022-11-18 18:49:58,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 18:49:58,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:49:58,089 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:49:58,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 18:49:58,090 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:49:58,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:58,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1846975814, now seen corresponding path program 1 times [2022-11-18 18:49:58,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:49:58,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570398397] [2022-11-18 18:49:58,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:49:58,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:49:58,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:49:58,112 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 18:49:58,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 18:49:58,139 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 18:49:58,139 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 18:49:58,141 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-11-18 18:49:58,143 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 18:49:58,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 18:49:58,148 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-18 18:49:58,151 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-18 18:49:58,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 06:49:58 BoogieIcfgContainer [2022-11-18 18:49:58,185 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-18 18:49:58,186 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-18 18:49:58,187 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-18 18:49:58,187 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-18 18:49:58,188 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:49:57" (3/4) ... [2022-11-18 18:49:58,193 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-18 18:49:58,193 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-18 18:49:58,195 INFO L158 Benchmark]: Toolchain (without parser) took 1697.18ms. Allocated memory was 111.1MB in the beginning and 134.2MB in the end (delta: 23.1MB). Free memory was 66.8MB in the beginning and 102.1MB in the end (delta: -35.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 18:49:58,196 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 111.1MB. Free memory is still 84.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 18:49:58,198 INFO L158 Benchmark]: CACSL2BoogieTranslator took 363.05ms. Allocated memory is still 111.1MB. Free memory was 66.7MB in the beginning and 81.9MB in the end (delta: -15.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-18 18:49:58,200 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.19ms. Allocated memory is still 111.1MB. Free memory was 81.9MB in the beginning and 79.9MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-18 18:49:58,203 INFO L158 Benchmark]: Boogie Preprocessor took 68.22ms. Allocated memory is still 111.1MB. Free memory was 79.9MB in the beginning and 78.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-18 18:49:58,203 INFO L158 Benchmark]: RCFGBuilder took 662.25ms. Allocated memory is still 111.1MB. Free memory was 78.2MB in the beginning and 59.3MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-11-18 18:49:58,204 INFO L158 Benchmark]: TraceAbstraction took 549.31ms. Allocated memory was 111.1MB in the beginning and 134.2MB in the end (delta: 23.1MB). Free memory was 58.8MB in the beginning and 102.1MB in the end (delta: -43.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 18:49:58,204 INFO L158 Benchmark]: Witness Printer took 7.39ms. Allocated memory is still 134.2MB. Free memory is still 102.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 18:49:58,210 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 111.1MB. Free memory is still 84.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 363.05ms. Allocated memory is still 111.1MB. Free memory was 66.7MB in the beginning and 81.9MB in the end (delta: -15.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.19ms. Allocated memory is still 111.1MB. Free memory was 81.9MB in the beginning and 79.9MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 68.22ms. Allocated memory is still 111.1MB. Free memory was 79.9MB in the beginning and 78.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 662.25ms. Allocated memory is still 111.1MB. Free memory was 78.2MB in the beginning and 59.3MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 549.31ms. Allocated memory was 111.1MB in the beginning and 134.2MB in the end (delta: 23.1MB). Free memory was 58.8MB in the beginning and 102.1MB in the end (delta: -43.3MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 7.39ms. Allocated memory is still 134.2MB. Free memory is still 102.1MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 48]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 47, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L310] COND TRUE __VERIFIER_nondet_int() [L311] CALL main1() [L39] float IN = __VERIFIER_nondet_float(); [L40] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L34] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L40] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L42] float x = IN; [L44-L45] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; VAL [IN=53, x=53] [L47] COND TRUE !(result >= 0.0f && result < 1.4f) VAL [IN=53, x=53] [L48] reach_error() VAL [IN=53, x=53] - UnprovableResult [Line: 61]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 81 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 113 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 0 IncrementalHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 113 mSDtfsCounter, 0 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-18 18:49:58,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 44a691d0c7049cc6934dd4c9eebe75a3ba34b64a09862ea689fabb3c0e0e6b0c --- 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-8393723 [2022-11-18 18:50:00,550 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:50:00,553 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:50:00,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:50:00,593 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:50:00,594 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:50:00,595 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:50:00,597 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:50:00,599 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:50:00,599 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:50:00,600 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:50:00,604 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:50:00,604 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:50:00,610 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:50:00,612 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:50:00,616 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:50:00,619 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:50:00,622 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:50:00,624 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:50:00,628 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:50:00,634 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:50:00,636 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:50:00,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:50:00,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:50:00,643 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:50:00,648 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:50:00,648 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:50:00,649 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:50:00,651 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:50:00,652 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:50:00,652 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:50:00,653 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:50:00,655 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:50:00,656 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:50:00,657 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:50:00,657 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:50:00,658 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:50:00,659 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:50:00,659 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:50:00,661 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:50:00,662 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:50:00,663 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-11-18 18:50:00,703 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:50:00,703 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:50:00,705 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:50:00,705 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:50:00,706 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:50:00,707 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:50:00,708 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:50:00,708 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:50:00,709 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:50:00,709 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:50:00,710 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 18:50:00,710 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 18:50:00,711 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:50:00,711 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 18:50:00,711 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:50:00,712 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 18:50:00,712 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 18:50:00,712 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-18 18:50:00,712 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-18 18:50:00,713 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 18:50:00,713 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 18:50:00,713 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:50:00,713 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 18:50:00,714 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:50:00,714 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:50:00,714 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:50:00,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:50:00,715 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:50:00,715 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:50:00,715 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 18:50:00,716 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-18 18:50:00,716 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-18 18:50:00,717 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 18:50:00,717 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 18:50:00,717 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 18:50:00,717 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-18 18:50:00,718 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_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 44a691d0c7049cc6934dd4c9eebe75a3ba34b64a09862ea689fabb3c0e0e6b0c [2022-11-18 18:50:01,155 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:50:01,185 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:50:01,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:50:01,190 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:50:01,191 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:50:01,193 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c [2022-11-18 18:50:01,277 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/data/dd3a144c9/4b6f2c9cdf1a4cd0aa9250ee1391074f/FLAG15e9e6392 [2022-11-18 18:50:01,751 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:50:01,752 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c [2022-11-18 18:50:01,760 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/data/dd3a144c9/4b6f2c9cdf1a4cd0aa9250ee1391074f/FLAG15e9e6392 [2022-11-18 18:50:02,130 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/data/dd3a144c9/4b6f2c9cdf1a4cd0aa9250ee1391074f [2022-11-18 18:50:02,132 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:50:02,134 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:50:02,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:50:02,135 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:50:02,141 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:50:02,141 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:50:02" (1/1) ... [2022-11-18 18:50:02,142 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@727d4279 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:50:02, skipping insertion in model container [2022-11-18 18:50:02,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:50:02" (1/1) ... [2022-11-18 18:50:02,152 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:50:02,196 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:50:02,376 WARN L234 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_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c[1995,2008] [2022-11-18 18:50:02,382 WARN L234 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_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c[2389,2402] [2022-11-18 18:50:02,464 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:50:02,489 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:50:02,505 WARN L234 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_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c[1995,2008] [2022-11-18 18:50:02,506 WARN L234 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_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c[2389,2402] [2022-11-18 18:50:02,530 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:50:02,544 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:50:02,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:50:02 WrapperNode [2022-11-18 18:50:02,545 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:50:02,546 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:50:02,546 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:50:02,546 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:50:02,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:50:02" (1/1) ... [2022-11-18 18:50:02,564 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:50:02" (1/1) ... [2022-11-18 18:50:02,583 INFO L138 Inliner]: procedures = 28, calls = 19, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 70 [2022-11-18 18:50:02,583 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:50:02,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:50:02,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:50:02,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:50:02,593 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:50:02" (1/1) ... [2022-11-18 18:50:02,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:50:02" (1/1) ... [2022-11-18 18:50:02,597 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:50:02" (1/1) ... [2022-11-18 18:50:02,598 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:50:02" (1/1) ... [2022-11-18 18:50:02,607 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:50:02" (1/1) ... [2022-11-18 18:50:02,611 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:50:02" (1/1) ... [2022-11-18 18:50:02,613 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:50:02" (1/1) ... [2022-11-18 18:50:02,614 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:50:02" (1/1) ... [2022-11-18 18:50:02,618 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:50:02,619 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:50:02,619 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:50:02,619 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:50:02,620 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:50:02" (1/1) ... [2022-11-18 18:50:02,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:50:02,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:50:02,661 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:50:02,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 18:50:02,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-18 18:50:02,710 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-11-18 18:50:02,711 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-11-18 18:50:02,711 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2022-11-18 18:50:02,711 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2022-11-18 18:50:02,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:50:02,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:50:02,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-18 18:50:02,712 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-18 18:50:02,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:50:02,807 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:50:02,808 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:50:05,316 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:50:05,323 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:50:05,323 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 18:50:05,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:50:05 BoogieIcfgContainer [2022-11-18 18:50:05,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:50:05,328 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:50:05,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:50:05,332 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:50:05,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:50:02" (1/3) ... [2022-11-18 18:50:05,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d56f2fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:50:05, skipping insertion in model container [2022-11-18 18:50:05,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:50:02" (2/3) ... [2022-11-18 18:50:05,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d56f2fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:50:05, skipping insertion in model container [2022-11-18 18:50:05,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:50:05" (3/3) ... [2022-11-18 18:50:05,335 INFO L112 eAbstractionObserver]: Analyzing ICFG square_7+soft_float_4-2a.c.cil.c [2022-11-18 18:50:05,354 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:50:05,368 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-18 18:50:05,423 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:50:05,429 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=PETRI_NET, 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;@4ca5fffc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:50:05,430 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:50:05,434 INFO L276 IsEmpty]: Start isEmpty. Operand has 63 states, 49 states have (on average 1.489795918367347) internal successors, (73), 51 states have internal predecessors, (73), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-18 18:50:05,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 18:50:05,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:05,446 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:05,447 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:50:05,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:05,457 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2022-11-18 18:50:05,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:50:05,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [964304216] [2022-11-18 18:50:05,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:50:05,471 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:50:05,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:50:05,483 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:50:05,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-18 18:50:06,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:06,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-18 18:50:06,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:50:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:06,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:50:06,174 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:50:06,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [964304216] [2022-11-18 18:50:06,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [964304216] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:50:06,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:50:06,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:50:06,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108202186] [2022-11-18 18:50:06,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:50:06,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:50:06,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:50:06,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:50:06,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:50:06,217 INFO L87 Difference]: Start difference. First operand has 63 states, 49 states have (on average 1.489795918367347) internal successors, (73), 51 states have internal predecessors, (73), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:06,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:06,273 INFO L93 Difference]: Finished difference Result 121 states and 178 transitions. [2022-11-18 18:50:06,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:50:06,278 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-18 18:50:06,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:06,288 INFO L225 Difference]: With dead ends: 121 [2022-11-18 18:50:06,288 INFO L226 Difference]: Without dead ends: 56 [2022-11-18 18:50:06,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:50:06,298 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:50:06,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:50:06,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-18 18:50:06,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-11-18 18:50:06,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 45 states have internal predecessors, (58), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-18 18:50:06,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2022-11-18 18:50:06,365 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 73 transitions. Word has length 7 [2022-11-18 18:50:06,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:06,366 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 73 transitions. [2022-11-18 18:50:06,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:06,367 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 73 transitions. [2022-11-18 18:50:06,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 18:50:06,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:06,369 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:06,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 18:50:06,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:50:06,583 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:50:06,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:06,584 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2022-11-18 18:50:06,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:50:06,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1406377197] [2022-11-18 18:50:06,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:50:06,585 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:50:06,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:50:06,591 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:50:06,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-18 18:55:28,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:55:28,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 18:55:28,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:55:43,458 WARN L837 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0) (= (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) |c_ULTIMATE.start_main1_~result~0#1|) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2022-11-18 18:56:17,212 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0))) (.cse2 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0))) (.cse3 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0))) (.cse4 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0))) (.cse0 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (or (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (and (not (fp.lt (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) ((_ to_fp 8 24) roundNearestTiesToEven (/ 7.0 5.0)))) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0))) (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (not (fp.geq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (_ +zero 8 24))) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0))))) is different from false [2022-11-18 18:56:19,264 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0))) (.cse2 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0))) (.cse3 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0))) (.cse4 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0))) (.cse0 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (or (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (and (not (fp.lt (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) ((_ to_fp 8 24) roundNearestTiesToEven (/ 7.0 5.0)))) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0))) (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (not (fp.geq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (_ +zero 8 24))) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0))))) is different from true [2022-11-18 18:56:19,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:56:19,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:56:19,265 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:56:19,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1406377197] [2022-11-18 18:56:19,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1406377197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:56:19,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:56:19,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 18:56:19,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979170565] [2022-11-18 18:56:19,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:56:19,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:56:19,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:56:19,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:56:19,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2022-11-18 18:56:19,269 INFO L87 Difference]: Start difference. First operand 56 states and 73 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:21,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:56:22,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:56:22,236 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2022-11-18 18:56:22,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 18:56:22,238 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-18 18:56:22,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:56:22,239 INFO L225 Difference]: With dead ends: 56 [2022-11-18 18:56:22,239 INFO L226 Difference]: Without dead ends: 51 [2022-11-18 18:56:22,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=18, Invalid=17, Unknown=3, NotChecked=18, Total=56 [2022-11-18 18:56:22,241 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 68 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:56:22,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 172 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 1 Unknown, 141 Unchecked, 2.7s Time] [2022-11-18 18:56:22,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-18 18:56:22,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-11-18 18:56:22,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.358974358974359) internal successors, (53), 40 states have internal predecessors, (53), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-18 18:56:22,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2022-11-18 18:56:22,251 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 7 [2022-11-18 18:56:22,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:56:22,251 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2022-11-18 18:56:22,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:22,252 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2022-11-18 18:56:22,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-18 18:56:22,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:56:22,253 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:56:22,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-18 18:56:22,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:22,463 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:56:22,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:56:22,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1078958274, now seen corresponding path program 1 times [2022-11-18 18:56:22,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:56:22,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [600319922] [2022-11-18 18:56:22,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:56:22,465 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:22,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:56:22,468 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:56:22,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-18 18:56:22,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:56:22,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 18:56:22,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:56:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 18:56:23,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:56:23,070 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:56:23,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [600319922] [2022-11-18 18:56:23,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [600319922] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:56:23,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:56:23,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 18:56:23,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794584019] [2022-11-18 18:56:23,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:56:23,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 18:56:23,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:56:23,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 18:56:23,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:56:23,073 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 18:56:23,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:56:23,713 INFO L93 Difference]: Finished difference Result 100 states and 135 transitions. [2022-11-18 18:56:23,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:56:23,714 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2022-11-18 18:56:23,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:56:23,717 INFO L225 Difference]: With dead ends: 100 [2022-11-18 18:56:23,717 INFO L226 Difference]: Without dead ends: 72 [2022-11-18 18:56:23,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:56:23,719 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 20 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:56:23,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 425 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 18:56:23,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-18 18:56:23,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 62. [2022-11-18 18:56:23,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 47 states have (on average 1.297872340425532) internal successors, (61), 49 states have internal predecessors, (61), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-18 18:56:23,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 81 transitions. [2022-11-18 18:56:23,732 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 81 transitions. Word has length 32 [2022-11-18 18:56:23,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:56:23,733 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 81 transitions. [2022-11-18 18:56:23,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 18:56:23,733 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 81 transitions. [2022-11-18 18:56:23,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-18 18:56:23,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:56:23,735 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] [2022-11-18 18:56:23,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-18 18:56:23,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:23,952 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:56:23,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:56:23,953 INFO L85 PathProgramCache]: Analyzing trace with hash 452521591, now seen corresponding path program 1 times [2022-11-18 18:56:23,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:56:23,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1314992577] [2022-11-18 18:56:23,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:56:23,954 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:23,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:56:23,955 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:56:23,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-18 18:56:24,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:56:24,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 18:56:24,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:56:24,633 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 18:56:24,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:56:24,974 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 18:56:24,975 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:56:24,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1314992577] [2022-11-18 18:56:24,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1314992577] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:56:24,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:56:24,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2022-11-18 18:56:24,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730193302] [2022-11-18 18:56:24,976 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:56:24,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 18:56:24,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:56:24,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 18:56:24,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-18 18:56:24,977 INFO L87 Difference]: Start difference. First operand 62 states and 81 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 18:56:25,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:56:25,868 INFO L93 Difference]: Finished difference Result 122 states and 160 transitions. [2022-11-18 18:56:25,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 18:56:25,869 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-11-18 18:56:25,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:56:25,871 INFO L225 Difference]: With dead ends: 122 [2022-11-18 18:56:25,871 INFO L226 Difference]: Without dead ends: 94 [2022-11-18 18:56:25,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:56:25,872 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 27 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:56:25,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 492 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 18:56:25,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-18 18:56:25,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 72. [2022-11-18 18:56:25,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 56 states have internal predecessors, (69), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2022-11-18 18:56:25,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 94 transitions. [2022-11-18 18:56:25,886 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 94 transitions. Word has length 36 [2022-11-18 18:56:25,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:56:25,887 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 94 transitions. [2022-11-18 18:56:25,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 18:56:25,888 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 94 transitions. [2022-11-18 18:56:25,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-18 18:56:25,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:56:25,889 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-18 18:56:25,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-18 18:56:26,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:26,103 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:56:26,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:56:26,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1328087799, now seen corresponding path program 1 times [2022-11-18 18:56:26,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:56:26,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1567045626] [2022-11-18 18:56:26,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:56:26,105 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:26,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:56:26,106 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:56:26,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-18 18:56:26,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:56:26,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 18:56:26,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:56:26,701 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 18:56:26,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:56:27,041 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 18:56:27,041 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:56:27,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1567045626] [2022-11-18 18:56:27,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1567045626] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:56:27,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:56:27,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-11-18 18:56:27,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985016540] [2022-11-18 18:56:27,042 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:56:27,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 18:56:27,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:56:27,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 18:56:27,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:56:27,043 INFO L87 Difference]: Start difference. First operand 72 states and 94 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 18:56:27,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:56:27,636 INFO L93 Difference]: Finished difference Result 114 states and 149 transitions. [2022-11-18 18:56:27,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:56:27,637 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-11-18 18:56:27,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:56:27,638 INFO L225 Difference]: With dead ends: 114 [2022-11-18 18:56:27,639 INFO L226 Difference]: Without dead ends: 90 [2022-11-18 18:56:27,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:56:27,640 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 16 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:56:27,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 462 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 18:56:27,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-18 18:56:27,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 82. [2022-11-18 18:56:27,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 63 states have internal predecessors, (76), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2022-11-18 18:56:27,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2022-11-18 18:56:27,659 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 40 [2022-11-18 18:56:27,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:56:27,659 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2022-11-18 18:56:27,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 18:56:27,660 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2022-11-18 18:56:27,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-18 18:56:27,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:56:27,664 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] [2022-11-18 18:56:27,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-18 18:56:27,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:27,877 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:56:27,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:56:27,878 INFO L85 PathProgramCache]: Analyzing trace with hash 78255138, now seen corresponding path program 2 times [2022-11-18 18:56:27,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:56:27,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1209218028] [2022-11-18 18:56:27,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:56:27,878 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:27,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:56:27,879 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:56:27,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-18 18:56:27,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 18:56:27,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:56:27,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 18:56:27,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:56:28,370 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 18:56:28,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:56:28,370 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:56:28,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1209218028] [2022-11-18 18:56:28,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1209218028] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:56:28,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:56:28,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 18:56:28,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709353532] [2022-11-18 18:56:28,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:56:28,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:56:28,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:56:28,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:56:28,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:56:28,372 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 18:56:28,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:56:28,727 INFO L93 Difference]: Finished difference Result 97 states and 122 transitions. [2022-11-18 18:56:28,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 18:56:28,728 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-11-18 18:56:28,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:56:28,729 INFO L225 Difference]: With dead ends: 97 [2022-11-18 18:56:28,729 INFO L226 Difference]: Without dead ends: 95 [2022-11-18 18:56:28,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:56:28,731 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 9 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:56:28,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 336 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 13 Unchecked, 0.2s Time] [2022-11-18 18:56:28,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-18 18:56:28,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 88. [2022-11-18 18:56:28,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.2461538461538462) internal successors, (81), 68 states have internal predecessors, (81), 14 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (17), 12 states have call predecessors, (17), 13 states have call successors, (17) [2022-11-18 18:56:28,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 112 transitions. [2022-11-18 18:56:28,745 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 112 transitions. Word has length 40 [2022-11-18 18:56:28,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:56:28,745 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 112 transitions. [2022-11-18 18:56:28,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 18:56:28,746 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 112 transitions. [2022-11-18 18:56:28,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-18 18:56:28,748 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:56:28,748 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] [2022-11-18 18:56:28,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-18 18:56:28,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:28,961 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:56:28,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:56:28,961 INFO L85 PathProgramCache]: Analyzing trace with hash 135513440, now seen corresponding path program 1 times [2022-11-18 18:56:28,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:56:28,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [73096926] [2022-11-18 18:56:28,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:56:28,962 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:28,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:56:28,963 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:56:28,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-18 18:56:29,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:56:29,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 18:56:29,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:56:29,410 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 18:56:29,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:56:29,410 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:56:29,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [73096926] [2022-11-18 18:56:29,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [73096926] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:56:29,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:56:29,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 18:56:29,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278049420] [2022-11-18 18:56:29,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:56:29,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:56:29,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:56:29,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:56:29,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:56:29,413 INFO L87 Difference]: Start difference. First operand 88 states and 112 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 18:56:29,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:56:29,713 INFO L93 Difference]: Finished difference Result 97 states and 121 transitions. [2022-11-18 18:56:29,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 18:56:29,714 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-11-18 18:56:29,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:56:29,716 INFO L225 Difference]: With dead ends: 97 [2022-11-18 18:56:29,716 INFO L226 Difference]: Without dead ends: 95 [2022-11-18 18:56:29,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:56:29,718 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 9 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:56:29,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 309 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 12 Unchecked, 0.1s Time] [2022-11-18 18:56:29,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-18 18:56:29,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 86. [2022-11-18 18:56:29,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.234375) internal successors, (79), 66 states have internal predecessors, (79), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2022-11-18 18:56:29,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2022-11-18 18:56:29,733 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 40 [2022-11-18 18:56:29,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:56:29,734 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2022-11-18 18:56:29,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 18:56:29,734 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2022-11-18 18:56:29,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-18 18:56:29,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:56:29,736 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-18 18:56:29,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-18 18:56:29,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:29,948 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:56:29,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:56:29,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1165006364, now seen corresponding path program 1 times [2022-11-18 18:56:29,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:56:29,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2047088540] [2022-11-18 18:56:29,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:56:29,949 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:29,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:56:29,951 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:56:29,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 18:56:30,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:56:30,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 18:56:30,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:56:30,921 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 18:56:30,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:56:30,922 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:56:30,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2047088540] [2022-11-18 18:56:30,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2047088540] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:56:30,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:56:30,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-18 18:56:30,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116487253] [2022-11-18 18:56:30,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:56:30,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 18:56:30,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:56:30,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 18:56:30,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:56:30,924 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 18:56:32,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:56:32,697 INFO L93 Difference]: Finished difference Result 127 states and 164 transitions. [2022-11-18 18:56:32,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 18:56:32,698 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2022-11-18 18:56:32,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:56:32,699 INFO L225 Difference]: With dead ends: 127 [2022-11-18 18:56:32,699 INFO L226 Difference]: Without dead ends: 120 [2022-11-18 18:56:32,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-18 18:56:32,701 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 35 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:56:32,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 572 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-18 18:56:32,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-18 18:56:32,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 101. [2022-11-18 18:56:32,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.2266666666666666) internal successors, (92), 77 states have internal predecessors, (92), 16 states have call successors, (16), 7 states have call predecessors, (16), 9 states have return successors, (22), 16 states have call predecessors, (22), 15 states have call successors, (22) [2022-11-18 18:56:32,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 130 transitions. [2022-11-18 18:56:32,718 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 130 transitions. Word has length 45 [2022-11-18 18:56:32,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:56:32,719 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 130 transitions. [2022-11-18 18:56:32,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 18:56:32,719 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 130 transitions. [2022-11-18 18:56:32,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-18 18:56:32,721 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:56:32,721 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-18 18:56:32,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 18:56:32,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:32,934 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:56:32,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:56:32,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1862719454, now seen corresponding path program 1 times [2022-11-18 18:56:32,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:56:32,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [485484077] [2022-11-18 18:56:32,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:56:32,943 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:32,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:56:32,944 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:56:32,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-18 18:56:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:56:33,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 18:56:33,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:56:33,986 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 18:56:33,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:56:35,206 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 18:56:35,206 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:56:35,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [485484077] [2022-11-18 18:56:35,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [485484077] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:56:35,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:56:35,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2022-11-18 18:56:35,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790900582] [2022-11-18 18:56:35,207 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:56:35,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 18:56:35,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:56:35,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 18:56:35,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-18 18:56:35,209 INFO L87 Difference]: Start difference. First operand 101 states and 130 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-18 18:56:37,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:56:37,195 INFO L93 Difference]: Finished difference Result 134 states and 172 transitions. [2022-11-18 18:56:37,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 18:56:37,196 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2022-11-18 18:56:37,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:56:37,197 INFO L225 Difference]: With dead ends: 134 [2022-11-18 18:56:37,197 INFO L226 Difference]: Without dead ends: 126 [2022-11-18 18:56:37,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-11-18 18:56:37,198 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 54 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:56:37,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 662 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-18 18:56:37,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-18 18:56:37,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 112. [2022-11-18 18:56:37,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 85 states have internal predecessors, (102), 17 states have call successors, (17), 7 states have call predecessors, (17), 10 states have return successors, (24), 19 states have call predecessors, (24), 16 states have call successors, (24) [2022-11-18 18:56:37,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 143 transitions. [2022-11-18 18:56:37,221 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 143 transitions. Word has length 47 [2022-11-18 18:56:37,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:56:37,222 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 143 transitions. [2022-11-18 18:56:37,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-18 18:56:37,227 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 143 transitions. [2022-11-18 18:56:37,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-18 18:56:37,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:56:37,229 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-18 18:56:37,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-18 18:56:37,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:37,439 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:56:37,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:56:37,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1805461152, now seen corresponding path program 1 times [2022-11-18 18:56:37,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:56:37,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [19013763] [2022-11-18 18:56:37,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:56:37,440 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:37,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:56:37,441 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:56:37,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 18:56:37,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:56:37,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 18:56:37,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:56:37,749 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-18 18:56:37,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:56:37,749 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:56:37,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [19013763] [2022-11-18 18:56:37,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [19013763] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:56:37,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:56:37,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 18:56:37,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697681576] [2022-11-18 18:56:37,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:56:37,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:56:37,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:56:37,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:56:37,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:56:37,751 INFO L87 Difference]: Start difference. First operand 112 states and 143 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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) [2022-11-18 18:56:38,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:56:38,061 INFO L93 Difference]: Finished difference Result 120 states and 150 transitions. [2022-11-18 18:56:38,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 18:56:38,061 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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 47 [2022-11-18 18:56:38,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:56:38,062 INFO L225 Difference]: With dead ends: 120 [2022-11-18 18:56:38,062 INFO L226 Difference]: Without dead ends: 105 [2022-11-18 18:56:38,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:56:38,064 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 6 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:56:38,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 314 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 18:56:38,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-18 18:56:38,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-18 18:56:38,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 81 states have internal predecessors, (95), 15 states have call successors, (15), 7 states have call predecessors, (15), 10 states have return successors, (21), 16 states have call predecessors, (21), 14 states have call successors, (21) [2022-11-18 18:56:38,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 131 transitions. [2022-11-18 18:56:38,077 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 131 transitions. Word has length 47 [2022-11-18 18:56:38,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:56:38,078 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 131 transitions. [2022-11-18 18:56:38,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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) [2022-11-18 18:56:38,078 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 131 transitions. [2022-11-18 18:56:38,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-18 18:56:38,079 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:56:38,079 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:56:38,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 18:56:38,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:38,291 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:56:38,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:56:38,291 INFO L85 PathProgramCache]: Analyzing trace with hash 2144611077, now seen corresponding path program 1 times [2022-11-18 18:56:38,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:56:38,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1966029716] [2022-11-18 18:56:38,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:56:38,292 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:38,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:56:38,293 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:56:38,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-18 18:56:38,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:56:38,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 18:56:38,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:56:39,421 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-18 18:56:39,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:56:42,173 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-18 18:56:42,173 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:56:42,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1966029716] [2022-11-18 18:56:42,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1966029716] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:56:42,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:56:42,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-11-18 18:56:42,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936821681] [2022-11-18 18:56:42,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:56:42,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 18:56:42,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:56:42,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 18:56:42,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2022-11-18 18:56:42,176 INFO L87 Difference]: Start difference. First operand 105 states and 131 transitions. Second operand has 24 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-18 18:56:48,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:56:48,416 INFO L93 Difference]: Finished difference Result 152 states and 204 transitions. [2022-11-18 18:56:48,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 18:56:48,417 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 49 [2022-11-18 18:56:48,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:56:48,419 INFO L225 Difference]: With dead ends: 152 [2022-11-18 18:56:48,419 INFO L226 Difference]: Without dead ends: 115 [2022-11-18 18:56:48,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2022-11-18 18:56:48,421 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 149 mSDsluCounter, 957 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:56:48,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 1029 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-18 18:56:48,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-18 18:56:48,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 87. [2022-11-18 18:56:48,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 65 states have (on average 1.2307692307692308) internal successors, (80), 69 states have internal predecessors, (80), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (24), 12 states have call predecessors, (24), 11 states have call successors, (24) [2022-11-18 18:56:48,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 116 transitions. [2022-11-18 18:56:48,435 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 116 transitions. Word has length 49 [2022-11-18 18:56:48,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:56:48,436 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 116 transitions. [2022-11-18 18:56:48,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-18 18:56:48,436 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 116 transitions. [2022-11-18 18:56:48,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-18 18:56:48,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:56:48,437 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:56:48,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-18 18:56:48,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:48,651 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:56:48,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:56:48,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1400781647, now seen corresponding path program 2 times [2022-11-18 18:56:48,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:56:48,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [244900755] [2022-11-18 18:56:48,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:56:48,652 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:48,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:56:48,654 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:56:48,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 18:56:48,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:56:48,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:56:48,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 18:56:48,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:56:49,807 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-18 18:56:49,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:56:52,472 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-18 18:56:52,472 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:56:52,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [244900755] [2022-11-18 18:56:52,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [244900755] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:56:52,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:56:52,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-11-18 18:56:52,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050387748] [2022-11-18 18:56:52,473 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:56:52,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 18:56:52,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:56:52,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 18:56:52,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2022-11-18 18:56:52,475 INFO L87 Difference]: Start difference. First operand 87 states and 116 transitions. Second operand has 24 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-18 18:56:58,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:56:58,226 INFO L93 Difference]: Finished difference Result 127 states and 174 transitions. [2022-11-18 18:56:58,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 18:56:58,227 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 49 [2022-11-18 18:56:58,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:56:58,228 INFO L225 Difference]: With dead ends: 127 [2022-11-18 18:56:58,229 INFO L226 Difference]: Without dead ends: 116 [2022-11-18 18:56:58,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2022-11-18 18:56:58,230 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 152 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-18 18:56:58,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 931 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-18 18:56:58,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-18 18:56:58,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 89. [2022-11-18 18:56:58,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 66 states have (on average 1.2272727272727273) internal successors, (81), 70 states have internal predecessors, (81), 13 states have call successors, (13), 5 states have call predecessors, (13), 9 states have return successors, (27), 13 states have call predecessors, (27), 12 states have call successors, (27) [2022-11-18 18:56:58,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 121 transitions. [2022-11-18 18:56:58,245 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 121 transitions. Word has length 49 [2022-11-18 18:56:58,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:56:58,246 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 121 transitions. [2022-11-18 18:56:58,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-18 18:56:58,246 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 121 transitions. [2022-11-18 18:56:58,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-18 18:56:58,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:56:58,248 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:56:58,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 18:56:58,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:58,459 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:56:58,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:56:58,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1227181886, now seen corresponding path program 1 times [2022-11-18 18:56:58,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:56:58,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [891943588] [2022-11-18 18:56:58,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:56:58,460 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:56:58,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:56:58,461 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:56:58,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-18 18:56:58,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:56:58,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:56:58,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:57:03,409 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 18:57:03,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:57:03,409 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:57:03,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [891943588] [2022-11-18 18:57:03,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [891943588] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:57:03,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:57:03,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 18:57:03,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933604240] [2022-11-18 18:57:03,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:57:03,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 18:57:03,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:57:03,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 18:57:03,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=36, Unknown=2, NotChecked=0, Total=56 [2022-11-18 18:57:03,412 INFO L87 Difference]: Start difference. First operand 89 states and 121 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 18:57:03,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:57:03,572 INFO L93 Difference]: Finished difference Result 96 states and 128 transitions. [2022-11-18 18:57:03,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:57:03,573 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2022-11-18 18:57:03,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:57:03,574 INFO L225 Difference]: With dead ends: 96 [2022-11-18 18:57:03,574 INFO L226 Difference]: Without dead ends: 94 [2022-11-18 18:57:03,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=22, Invalid=48, Unknown=2, NotChecked=0, Total=72 [2022-11-18 18:57:03,575 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 9 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:57:03,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 289 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 24 Unchecked, 0.1s Time] [2022-11-18 18:57:03,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-18 18:57:03,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-11-18 18:57:03,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 74 states have internal predecessors, (84), 14 states have call successors, (14), 6 states have call predecessors, (14), 10 states have return successors, (28), 13 states have call predecessors, (28), 13 states have call successors, (28) [2022-11-18 18:57:03,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2022-11-18 18:57:03,590 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 126 transitions. Word has length 50 [2022-11-18 18:57:03,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:57:03,590 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 126 transitions. [2022-11-18 18:57:03,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 18:57:03,590 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 126 transitions. [2022-11-18 18:57:03,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-18 18:57:03,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:57:03,592 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] [2022-11-18 18:57:03,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-18 18:57:03,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:03,799 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:57:03,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:57:03,799 INFO L85 PathProgramCache]: Analyzing trace with hash 792222103, now seen corresponding path program 1 times [2022-11-18 18:57:03,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:57:03,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1138370632] [2022-11-18 18:57:03,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:57:03,800 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:03,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:57:03,800 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:57:03,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 18:57:03,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:57:03,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 18:57:03,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:57:04,546 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-18 18:57:04,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:57:06,122 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-18 18:57:06,122 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:57:06,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1138370632] [2022-11-18 18:57:06,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1138370632] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:57:06,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:57:06,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-11-18 18:57:06,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673306831] [2022-11-18 18:57:06,123 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:57:06,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 18:57:06,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:57:06,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 18:57:06,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-11-18 18:57:06,125 INFO L87 Difference]: Start difference. First operand 94 states and 126 transitions. Second operand has 16 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-18 18:57:08,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:57:08,507 INFO L93 Difference]: Finished difference Result 130 states and 180 transitions. [2022-11-18 18:57:08,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 18:57:08,508 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 51 [2022-11-18 18:57:08,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:57:08,509 INFO L225 Difference]: With dead ends: 130 [2022-11-18 18:57:08,509 INFO L226 Difference]: Without dead ends: 119 [2022-11-18 18:57:08,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-11-18 18:57:08,510 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 78 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:57:08,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 739 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-18 18:57:08,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-18 18:57:08,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 97. [2022-11-18 18:57:08,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 77 states have internal predecessors, (86), 14 states have call successors, (14), 6 states have call predecessors, (14), 11 states have return successors, (31), 13 states have call predecessors, (31), 13 states have call successors, (31) [2022-11-18 18:57:08,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 131 transitions. [2022-11-18 18:57:08,528 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 131 transitions. Word has length 51 [2022-11-18 18:57:08,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:57:08,528 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 131 transitions. [2022-11-18 18:57:08,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-18 18:57:08,529 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 131 transitions. [2022-11-18 18:57:08,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-18 18:57:08,530 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:57:08,530 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:57:08,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 18:57:08,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:08,748 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:57:08,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:57:08,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1615591569, now seen corresponding path program 1 times [2022-11-18 18:57:08,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:57:08,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2108239315] [2022-11-18 18:57:08,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:57:08,749 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:08,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:57:08,751 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:57:08,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 18:57:08,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:57:08,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 18:57:08,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:57:09,450 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 18:57:09,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:57:09,451 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:57:09,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2108239315] [2022-11-18 18:57:09,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2108239315] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:57:09,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:57:09,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-18 18:57:09,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23161166] [2022-11-18 18:57:09,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:57:09,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 18:57:09,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:57:09,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 18:57:09,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-18 18:57:09,453 INFO L87 Difference]: Start difference. First operand 97 states and 131 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-18 18:57:10,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:57:10,289 INFO L93 Difference]: Finished difference Result 160 states and 203 transitions. [2022-11-18 18:57:10,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 18:57:10,289 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 55 [2022-11-18 18:57:10,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:57:10,290 INFO L225 Difference]: With dead ends: 160 [2022-11-18 18:57:10,291 INFO L226 Difference]: Without dead ends: 92 [2022-11-18 18:57:10,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:57:10,292 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 14 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:57:10,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 509 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 18:57:10,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-18 18:57:10,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2022-11-18 18:57:10,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 65 states have (on average 1.2307692307692308) internal successors, (80), 71 states have internal predecessors, (80), 13 states have call successors, (13), 5 states have call predecessors, (13), 10 states have return successors, (29), 12 states have call predecessors, (29), 12 states have call successors, (29) [2022-11-18 18:57:10,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2022-11-18 18:57:10,304 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 55 [2022-11-18 18:57:10,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:57:10,305 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2022-11-18 18:57:10,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-18 18:57:10,305 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2022-11-18 18:57:10,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-18 18:57:10,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:57:10,306 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] [2022-11-18 18:57:10,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 18:57:10,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:10,520 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:57:10,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:57:10,520 INFO L85 PathProgramCache]: Analyzing trace with hash 381005423, now seen corresponding path program 1 times [2022-11-18 18:57:10,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:57:10,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1430242660] [2022-11-18 18:57:10,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:57:10,521 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:10,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:57:10,522 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:57:10,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-18 18:57:10,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:57:10,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:57:10,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:57:16,006 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 18:57:16,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:57:16,006 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:57:16,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1430242660] [2022-11-18 18:57:16,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1430242660] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:57:16,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:57:16,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 18:57:16,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223351573] [2022-11-18 18:57:16,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:57:16,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 18:57:16,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:57:16,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 18:57:16,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=37, Unknown=1, NotChecked=0, Total=56 [2022-11-18 18:57:16,008 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 18:57:16,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:57:16,160 INFO L93 Difference]: Finished difference Result 95 states and 127 transitions. [2022-11-18 18:57:16,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:57:16,161 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2022-11-18 18:57:16,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:57:16,162 INFO L225 Difference]: With dead ends: 95 [2022-11-18 18:57:16,163 INFO L226 Difference]: Without dead ends: 91 [2022-11-18 18:57:16,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=22, Invalid=49, Unknown=1, NotChecked=0, Total=72 [2022-11-18 18:57:16,164 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 12 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:57:16,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 364 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-11-18 18:57:16,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-18 18:57:16,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2022-11-18 18:57:16,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.21875) internal successors, (78), 68 states have internal predecessors, (78), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (28), 12 states have call predecessors, (28), 11 states have call successors, (28) [2022-11-18 18:57:16,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 118 transitions. [2022-11-18 18:57:16,177 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 118 transitions. Word has length 51 [2022-11-18 18:57:16,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:57:16,177 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 118 transitions. [2022-11-18 18:57:16,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 18:57:16,177 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 118 transitions. [2022-11-18 18:57:16,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-18 18:57:16,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:57:16,179 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 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] [2022-11-18 18:57:16,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-18 18:57:16,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:16,392 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:57:16,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:57:16,392 INFO L85 PathProgramCache]: Analyzing trace with hash 57968830, now seen corresponding path program 1 times [2022-11-18 18:57:16,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:57:16,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [261758129] [2022-11-18 18:57:16,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:57:16,393 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 [2022-11-18 18:57:16,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:57:16,394 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:57:16,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 18:57:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:57:16,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:57:16,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:57:16,918 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-18 18:57:16,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:57:17,754 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-18 18:57:17,754 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:57:17,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [261758129] [2022-11-18 18:57:17,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [261758129] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:57:17,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:57:17,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-11-18 18:57:17,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288898422] [2022-11-18 18:57:17,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:57:17,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 18:57:17,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:57:17,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 18:57:17,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:57:17,757 INFO L87 Difference]: Start difference. First operand 86 states and 118 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 18:57:18,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:57:18,721 INFO L93 Difference]: Finished difference Result 112 states and 164 transitions. [2022-11-18 18:57:18,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 18:57:18,722 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 55 [2022-11-18 18:57:18,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:57:18,723 INFO L225 Difference]: With dead ends: 112 [2022-11-18 18:57:18,723 INFO L226 Difference]: Without dead ends: 99 [2022-11-18 18:57:18,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-11-18 18:57:18,724 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 157 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:57:18,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 349 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 18:57:18,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-18 18:57:18,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 89. [2022-11-18 18:57:18,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 71 states have internal predecessors, (80), 12 states have call successors, (12), 5 states have call predecessors, (12), 10 states have return successors, (31), 12 states have call predecessors, (31), 11 states have call successors, (31) [2022-11-18 18:57:18,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 123 transitions. [2022-11-18 18:57:18,740 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 123 transitions. Word has length 55 [2022-11-18 18:57:18,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:57:18,741 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 123 transitions. [2022-11-18 18:57:18,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 18:57:18,741 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 123 transitions. [2022-11-18 18:57:18,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-18 18:57:18,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:57:18,742 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 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] [2022-11-18 18:57:18,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 18:57:18,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:18,956 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:57:18,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:57:18,956 INFO L85 PathProgramCache]: Analyzing trace with hash -768011691, now seen corresponding path program 1 times [2022-11-18 18:57:18,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:57:18,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146154350] [2022-11-18 18:57:18,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:57:18,957 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:18,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:57:18,958 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:57:18,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-18 18:57:19,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:57:19,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:57:19,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:57:19,556 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-18 18:57:19,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:57:20,535 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-18 18:57:20,536 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:57:20,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146154350] [2022-11-18 18:57:20,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [146154350] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:57:20,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:57:20,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-11-18 18:57:20,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582053639] [2022-11-18 18:57:20,536 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:57:20,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 18:57:20,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:57:20,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 18:57:20,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:57:20,538 INFO L87 Difference]: Start difference. First operand 89 states and 123 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-18 18:57:21,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:57:21,758 INFO L93 Difference]: Finished difference Result 112 states and 162 transitions. [2022-11-18 18:57:21,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:57:21,759 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 64 [2022-11-18 18:57:21,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:57:21,760 INFO L225 Difference]: With dead ends: 112 [2022-11-18 18:57:21,761 INFO L226 Difference]: Without dead ends: 99 [2022-11-18 18:57:21,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-18 18:57:21,762 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 97 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:57:21,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 505 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 18:57:21,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-18 18:57:21,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 89. [2022-11-18 18:57:21,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 71 states have internal predecessors, (80), 12 states have call successors, (12), 5 states have call predecessors, (12), 10 states have return successors, (30), 12 states have call predecessors, (30), 11 states have call successors, (30) [2022-11-18 18:57:21,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2022-11-18 18:57:21,777 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 64 [2022-11-18 18:57:21,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:57:21,778 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2022-11-18 18:57:21,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-18 18:57:21,778 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2022-11-18 18:57:21,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-18 18:57:21,779 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:57:21,780 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 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] [2022-11-18 18:57:21,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-18 18:57:21,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:21,999 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:57:22,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:57:22,000 INFO L85 PathProgramCache]: Analyzing trace with hash -773215852, now seen corresponding path program 1 times [2022-11-18 18:57:22,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:57:22,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358415285] [2022-11-18 18:57:22,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:57:22,000 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:22,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:57:22,002 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:57:22,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 18:57:22,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:57:22,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:57:22,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:57:22,637 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-18 18:57:22,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:57:23,539 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-18 18:57:23,539 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:57:23,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358415285] [2022-11-18 18:57:23,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358415285] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:57:23,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:57:23,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-11-18 18:57:23,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761273597] [2022-11-18 18:57:23,540 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:57:23,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 18:57:23,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:57:23,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 18:57:23,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:57:23,542 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-18 18:57:24,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:57:24,615 INFO L93 Difference]: Finished difference Result 110 states and 154 transitions. [2022-11-18 18:57:24,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 18:57:24,616 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 64 [2022-11-18 18:57:24,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:57:24,619 INFO L225 Difference]: With dead ends: 110 [2022-11-18 18:57:24,619 INFO L226 Difference]: Without dead ends: 96 [2022-11-18 18:57:24,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-11-18 18:57:24,620 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 117 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:57:24,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 527 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 18:57:24,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-18 18:57:24,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2022-11-18 18:57:24,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.203125) internal successors, (77), 68 states have internal predecessors, (77), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (27), 12 states have call predecessors, (27), 11 states have call successors, (27) [2022-11-18 18:57:24,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 116 transitions. [2022-11-18 18:57:24,641 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 116 transitions. Word has length 64 [2022-11-18 18:57:24,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:57:24,642 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 116 transitions. [2022-11-18 18:57:24,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-18 18:57:24,642 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 116 transitions. [2022-11-18 18:57:24,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-18 18:57:24,643 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:57:24,644 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 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] [2022-11-18 18:57:24,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 18:57:24,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:24,857 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:57:24,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:57:24,858 INFO L85 PathProgramCache]: Analyzing trace with hash 336770129, now seen corresponding path program 1 times [2022-11-18 18:57:24,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:57:24,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307330499] [2022-11-18 18:57:24,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:57:24,858 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 [2022-11-18 18:57:24,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:57:24,860 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:57:24,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 18:57:24,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:57:24,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:57:24,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:57:25,444 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-18 18:57:25,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:57:26,461 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-18 18:57:26,461 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:57:26,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307330499] [2022-11-18 18:57:26,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307330499] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:57:26,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:57:26,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-11-18 18:57:26,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346318968] [2022-11-18 18:57:26,462 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:57:26,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 18:57:26,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:57:26,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 18:57:26,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:57:26,464 INFO L87 Difference]: Start difference. First operand 86 states and 116 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-18 18:57:27,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:57:27,502 INFO L93 Difference]: Finished difference Result 107 states and 148 transitions. [2022-11-18 18:57:27,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:57:27,502 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 66 [2022-11-18 18:57:27,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:57:27,503 INFO L225 Difference]: With dead ends: 107 [2022-11-18 18:57:27,503 INFO L226 Difference]: Without dead ends: 93 [2022-11-18 18:57:27,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-18 18:57:27,504 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 129 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:57:27,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 439 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 18:57:27,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-18 18:57:27,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2022-11-18 18:57:27,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 65 states have internal predecessors, (74), 12 states have call successors, (12), 5 states have call predecessors, (12), 8 states have return successors, (25), 12 states have call predecessors, (25), 11 states have call successors, (25) [2022-11-18 18:57:27,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 111 transitions. [2022-11-18 18:57:27,526 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 111 transitions. Word has length 66 [2022-11-18 18:57:27,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:57:27,527 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 111 transitions. [2022-11-18 18:57:27,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-18 18:57:27,527 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 111 transitions. [2022-11-18 18:57:27,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-18 18:57:27,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:57:27,530 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 18:57:27,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 18:57:27,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:27,743 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:57:27,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:57:27,743 INFO L85 PathProgramCache]: Analyzing trace with hash -644666623, now seen corresponding path program 1 times [2022-11-18 18:57:27,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:57:27,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383707862] [2022-11-18 18:57:27,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:57:27,744 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:27,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:57:27,745 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:57:27,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-18 18:57:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:57:27,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 18:57:27,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:57:31,700 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 18:57:31,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:57:37,592 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 18:57:37,592 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:57:37,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383707862] [2022-11-18 18:57:37,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1383707862] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:57:37,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:57:37,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2022-11-18 18:57:37,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870958323] [2022-11-18 18:57:37,593 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:57:37,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-18 18:57:37,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:57:37,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-18 18:57:37,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-11-18 18:57:37,595 INFO L87 Difference]: Start difference. First operand 83 states and 111 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-18 18:57:43,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:57:43,643 INFO L93 Difference]: Finished difference Result 107 states and 151 transitions. [2022-11-18 18:57:43,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 18:57:43,644 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 73 [2022-11-18 18:57:43,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:57:43,645 INFO L225 Difference]: With dead ends: 107 [2022-11-18 18:57:43,646 INFO L226 Difference]: Without dead ends: 98 [2022-11-18 18:57:43,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=179, Invalid=1011, Unknown=0, NotChecked=0, Total=1190 [2022-11-18 18:57:43,647 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 62 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:57:43,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 938 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 218 Invalid, 0 Unknown, 98 Unchecked, 1.5s Time] [2022-11-18 18:57:43,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-18 18:57:43,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2022-11-18 18:57:43,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 70 states have internal predecessors, (80), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (29), 12 states have call predecessors, (29), 11 states have call successors, (29) [2022-11-18 18:57:43,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 121 transitions. [2022-11-18 18:57:43,663 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 121 transitions. Word has length 73 [2022-11-18 18:57:43,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:57:43,663 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 121 transitions. [2022-11-18 18:57:43,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-18 18:57:43,664 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 121 transitions. [2022-11-18 18:57:43,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-18 18:57:43,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:57:43,665 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 18:57:43,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-18 18:57:43,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:43,879 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:57:43,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:57:43,880 INFO L85 PathProgramCache]: Analyzing trace with hash -719396020, now seen corresponding path program 1 times [2022-11-18 18:57:43,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:57:43,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [666215105] [2022-11-18 18:57:43,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:57:43,880 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:43,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:57:43,881 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:57:43,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 18:57:43,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:57:43,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-18 18:57:43,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:57:45,575 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-18 18:57:45,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:57:45,575 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:57:45,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [666215105] [2022-11-18 18:57:45,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [666215105] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:57:45,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:57:45,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 18:57:45,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943847189] [2022-11-18 18:57:45,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:57:45,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:57:45,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:57:45,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:57:45,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:57:45,577 INFO L87 Difference]: Start difference. First operand 88 states and 121 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-18 18:57:47,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:57:47,665 INFO L93 Difference]: Finished difference Result 109 states and 148 transitions. [2022-11-18 18:57:47,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 18:57:47,667 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 73 [2022-11-18 18:57:47,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:57:47,668 INFO L225 Difference]: With dead ends: 109 [2022-11-18 18:57:47,668 INFO L226 Difference]: Without dead ends: 98 [2022-11-18 18:57:47,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-11-18 18:57:47,669 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 48 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:57:47,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 581 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-18 18:57:47,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-18 18:57:47,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2022-11-18 18:57:47,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 74 states have internal predecessors, (83), 13 states have call successors, (13), 5 states have call predecessors, (13), 10 states have return successors, (33), 13 states have call predecessors, (33), 12 states have call successors, (33) [2022-11-18 18:57:47,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 129 transitions. [2022-11-18 18:57:47,686 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 129 transitions. Word has length 73 [2022-11-18 18:57:47,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:57:47,686 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 129 transitions. [2022-11-18 18:57:47,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-18 18:57:47,687 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 129 transitions. [2022-11-18 18:57:47,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-18 18:57:47,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:57:47,688 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 18:57:47,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 18:57:47,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:47,902 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:57:47,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:57:47,902 INFO L85 PathProgramCache]: Analyzing trace with hash -425811905, now seen corresponding path program 1 times [2022-11-18 18:57:47,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:57:47,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [904171783] [2022-11-18 18:57:47,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:57:47,903 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:57:47,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:57:47,903 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:57:47,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 18:57:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:57:47,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-18 18:57:47,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:57:50,565 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 18:57:50,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:57:57,495 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 18:57:57,495 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:57:57,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [904171783] [2022-11-18 18:57:57,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [904171783] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:57:57,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:57:57,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2022-11-18 18:57:57,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545746364] [2022-11-18 18:57:57,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:57:57,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-18 18:57:57,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:57:57,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-18 18:57:57,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-11-18 18:57:57,498 INFO L87 Difference]: Start difference. First operand 93 states and 129 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-18 18:58:12,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:58:12,519 INFO L93 Difference]: Finished difference Result 160 states and 217 transitions. [2022-11-18 18:58:12,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-18 18:58:12,521 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 73 [2022-11-18 18:58:12,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:58:12,522 INFO L225 Difference]: With dead ends: 160 [2022-11-18 18:58:12,522 INFO L226 Difference]: Without dead ends: 122 [2022-11-18 18:58:12,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=485, Invalid=2167, Unknown=0, NotChecked=0, Total=2652 [2022-11-18 18:58:12,525 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 263 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:58:12,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 950 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-11-18 18:58:12,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-18 18:58:12,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 105. [2022-11-18 18:58:12,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 83 states have internal predecessors, (94), 15 states have call successors, (15), 6 states have call predecessors, (15), 10 states have return successors, (37), 15 states have call predecessors, (37), 14 states have call successors, (37) [2022-11-18 18:58:12,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 146 transitions. [2022-11-18 18:58:12,553 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 146 transitions. Word has length 73 [2022-11-18 18:58:12,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:58:12,554 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 146 transitions. [2022-11-18 18:58:12,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-18 18:58:12,554 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 146 transitions. [2022-11-18 18:58:12,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-18 18:58:12,555 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:58:12,556 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 18:58:12,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 18:58:12,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:58:12,769 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:58:12,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:58:12,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1804933507, now seen corresponding path program 2 times [2022-11-18 18:58:12,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:58:12,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1680576626] [2022-11-18 18:58:12,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:58:12,770 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:58:12,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:58:12,772 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:58:12,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-18 18:58:12,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:58:12,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:58:12,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-18 18:58:12,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:58:15,524 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 18:58:15,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:58:22,177 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 18:58:22,178 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:58:22,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1680576626] [2022-11-18 18:58:22,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1680576626] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:58:22,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:58:22,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2022-11-18 18:58:22,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457157614] [2022-11-18 18:58:22,178 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:58:22,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-18 18:58:22,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:58:22,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-18 18:58:22,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2022-11-18 18:58:22,180 INFO L87 Difference]: Start difference. First operand 105 states and 146 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-18 18:58:39,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:58:39,598 INFO L93 Difference]: Finished difference Result 179 states and 247 transitions. [2022-11-18 18:58:39,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-18 18:58:39,600 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 73 [2022-11-18 18:58:39,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:58:39,614 INFO L225 Difference]: With dead ends: 179 [2022-11-18 18:58:39,614 INFO L226 Difference]: Without dead ends: 139 [2022-11-18 18:58:39,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=484, Invalid=2168, Unknown=0, NotChecked=0, Total=2652 [2022-11-18 18:58:39,616 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 338 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:58:39,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 899 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-11-18 18:58:39,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-18 18:58:39,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 122. [2022-11-18 18:58:39,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 92 states have (on average 1.173913043478261) internal successors, (108), 96 states have internal predecessors, (108), 18 states have call successors, (18), 7 states have call predecessors, (18), 11 states have return successors, (46), 18 states have call predecessors, (46), 17 states have call successors, (46) [2022-11-18 18:58:39,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 172 transitions. [2022-11-18 18:58:39,645 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 172 transitions. Word has length 73 [2022-11-18 18:58:39,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:58:39,646 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 172 transitions. [2022-11-18 18:58:39,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-18 18:58:39,646 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 172 transitions. [2022-11-18 18:58:39,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-18 18:58:39,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:58:39,649 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 18:58:39,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-18 18:58:39,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:58:39,868 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:58:39,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:58:39,868 INFO L85 PathProgramCache]: Analyzing trace with hash 555904934, now seen corresponding path program 1 times [2022-11-18 18:58:39,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:58:39,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [381594212] [2022-11-18 18:58:39,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:58:39,870 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 [2022-11-18 18:58:39,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:58:39,871 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:58:39,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 18:58:39,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:58:39,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 18:58:39,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:58:40,569 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-18 18:58:40,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:58:40,570 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:58:40,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [381594212] [2022-11-18 18:58:40,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [381594212] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:58:40,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:58:40,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 18:58:40,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663450926] [2022-11-18 18:58:40,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:58:40,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 18:58:40,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:58:40,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 18:58:40,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:58:40,571 INFO L87 Difference]: Start difference. First operand 122 states and 172 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 18:58:40,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:58:40,986 INFO L93 Difference]: Finished difference Result 136 states and 187 transitions. [2022-11-18 18:58:40,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 18:58:40,987 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 75 [2022-11-18 18:58:40,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:58:40,989 INFO L225 Difference]: With dead ends: 136 [2022-11-18 18:58:40,989 INFO L226 Difference]: Without dead ends: 127 [2022-11-18 18:58:40,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-18 18:58:40,990 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 7 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:58:40,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 354 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 18:58:40,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-18 18:58:41,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 122. [2022-11-18 18:58:41,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 92 states have (on average 1.173913043478261) internal successors, (108), 96 states have internal predecessors, (108), 18 states have call successors, (18), 7 states have call predecessors, (18), 11 states have return successors, (44), 18 states have call predecessors, (44), 17 states have call successors, (44) [2022-11-18 18:58:41,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 170 transitions. [2022-11-18 18:58:41,020 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 170 transitions. Word has length 75 [2022-11-18 18:58:41,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:58:41,021 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 170 transitions. [2022-11-18 18:58:41,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 18:58:41,021 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 170 transitions. [2022-11-18 18:58:41,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-18 18:58:41,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:58:41,023 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 18:58:41,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 18:58:41,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:58:41,236 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:58:41,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:58:41,237 INFO L85 PathProgramCache]: Analyzing trace with hash 481175537, now seen corresponding path program 1 times [2022-11-18 18:58:41,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:58:41,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089663888] [2022-11-18 18:58:41,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:58:41,237 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:58:41,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:58:41,238 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:58:41,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 18:58:41,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:58:41,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 18:58:41,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:58:44,724 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 18:58:44,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:58:46,835 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:58:46,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089663888] [2022-11-18 18:58:46,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089663888] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:58:46,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1506823053] [2022-11-18 18:58:46,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:58:46,836 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 18:58:46,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 18:58:46,838 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 18:58:46,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-18 18:58:46,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:58:46,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 18:58:46,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:58:48,089 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-18 18:58:48,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:58:48,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1506823053] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:58:48,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:58:48,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2022-11-18 18:58:48,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402067442] [2022-11-18 18:58:48,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:58:48,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 18:58:48,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:58:48,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 18:58:48,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:58:48,092 INFO L87 Difference]: Start difference. First operand 122 states and 170 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-18 18:58:48,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:58:48,452 INFO L93 Difference]: Finished difference Result 149 states and 217 transitions. [2022-11-18 18:58:48,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 18:58:48,453 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 75 [2022-11-18 18:58:48,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:58:48,455 INFO L225 Difference]: With dead ends: 149 [2022-11-18 18:58:48,455 INFO L226 Difference]: Without dead ends: 138 [2022-11-18 18:58:48,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:58:48,456 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 22 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:58:48,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 286 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 18:58:48,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-11-18 18:58:48,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 129. [2022-11-18 18:58:48,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 96 states have (on average 1.1666666666666667) internal successors, (112), 101 states have internal predecessors, (112), 20 states have call successors, (20), 7 states have call predecessors, (20), 12 states have return successors, (50), 20 states have call predecessors, (50), 19 states have call successors, (50) [2022-11-18 18:58:48,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 182 transitions. [2022-11-18 18:58:48,492 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 182 transitions. Word has length 75 [2022-11-18 18:58:48,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:58:48,492 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 182 transitions. [2022-11-18 18:58:48,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-18 18:58:48,493 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 182 transitions. [2022-11-18 18:58:48,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-18 18:58:48,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:58:48,494 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 18:58:48,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-11-18 18:58:48,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 18:58:48,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:58:48,896 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:58:48,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:58:48,897 INFO L85 PathProgramCache]: Analyzing trace with hash 700030255, now seen corresponding path program 1 times [2022-11-18 18:58:48,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:58:48,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1612276390] [2022-11-18 18:58:48,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:58:48,897 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:58:48,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:58:48,898 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:58:48,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 18:58:48,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:58:48,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-18 18:58:48,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:58:51,649 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 18:58:51,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:58:58,399 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 18:58:58,399 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:58:58,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1612276390] [2022-11-18 18:58:58,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1612276390] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:58:58,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:58:58,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2022-11-18 18:58:58,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853435962] [2022-11-18 18:58:58,400 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:58:58,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-18 18:58:58,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:58:58,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-18 18:58:58,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2022-11-18 18:58:58,402 INFO L87 Difference]: Start difference. First operand 129 states and 182 transitions. Second operand has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 28 states have internal predecessors, (64), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-18 18:59:09,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:59:09,071 INFO L93 Difference]: Finished difference Result 161 states and 217 transitions. [2022-11-18 18:59:09,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 18:59:09,073 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 28 states have internal predecessors, (64), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 75 [2022-11-18 18:59:09,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:59:09,074 INFO L225 Difference]: With dead ends: 161 [2022-11-18 18:59:09,074 INFO L226 Difference]: Without dead ends: 141 [2022-11-18 18:59:09,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=381, Invalid=1511, Unknown=0, NotChecked=0, Total=1892 [2022-11-18 18:59:09,075 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 186 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:59:09,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 914 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-11-18 18:59:09,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-18 18:59:09,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 131. [2022-11-18 18:59:09,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 98 states have (on average 1.163265306122449) internal successors, (114), 102 states have internal predecessors, (114), 20 states have call successors, (20), 8 states have call predecessors, (20), 12 states have return successors, (45), 20 states have call predecessors, (45), 19 states have call successors, (45) [2022-11-18 18:59:09,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 179 transitions. [2022-11-18 18:59:09,102 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 179 transitions. Word has length 75 [2022-11-18 18:59:09,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:59:09,103 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 179 transitions. [2022-11-18 18:59:09,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 28 states have internal predecessors, (64), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-18 18:59:09,103 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 179 transitions. [2022-11-18 18:59:09,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-18 18:59:09,109 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:59:09,109 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 18:59:09,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 18:59:09,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:59:09,323 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:59:09,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:59:09,324 INFO L85 PathProgramCache]: Analyzing trace with hash 904822259, now seen corresponding path program 2 times [2022-11-18 18:59:09,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:59:09,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323066702] [2022-11-18 18:59:09,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:59:09,324 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:59:09,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:59:09,325 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:59:09,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-18 18:59:09,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:59:09,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:59:09,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-18 18:59:09,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:59:12,242 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 18:59:12,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:59:19,231 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 18:59:19,231 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:59:19,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323066702] [2022-11-18 18:59:19,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1323066702] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:59:19,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:59:19,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2022-11-18 18:59:19,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519548164] [2022-11-18 18:59:19,232 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:59:19,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-18 18:59:19,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:59:19,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-18 18:59:19,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2022-11-18 18:59:19,233 INFO L87 Difference]: Start difference. First operand 131 states and 179 transitions. Second operand has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 28 states have internal predecessors, (64), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-18 18:59:31,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:59:31,833 INFO L93 Difference]: Finished difference Result 163 states and 214 transitions. [2022-11-18 18:59:31,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 18:59:31,835 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 28 states have internal predecessors, (64), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 75 [2022-11-18 18:59:31,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:59:31,836 INFO L225 Difference]: With dead ends: 163 [2022-11-18 18:59:31,836 INFO L226 Difference]: Without dead ends: 149 [2022-11-18 18:59:31,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=375, Invalid=1517, Unknown=0, NotChecked=0, Total=1892 [2022-11-18 18:59:31,838 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 186 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:59:31,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 1046 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-11-18 18:59:31,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-11-18 18:59:31,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 139. [2022-11-18 18:59:31,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 105 states have (on average 1.161904761904762) internal successors, (122), 108 states have internal predecessors, (122), 21 states have call successors, (21), 9 states have call predecessors, (21), 12 states have return successors, (43), 21 states have call predecessors, (43), 20 states have call successors, (43) [2022-11-18 18:59:31,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 186 transitions. [2022-11-18 18:59:31,876 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 186 transitions. Word has length 75 [2022-11-18 18:59:31,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:59:31,876 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 186 transitions. [2022-11-18 18:59:31,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 28 states have internal predecessors, (64), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-18 18:59:31,877 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 186 transitions. [2022-11-18 18:59:31,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-18 18:59:31,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:59:31,878 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 18:59:31,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-18 18:59:32,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:59:32,092 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:59:32,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:59:32,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1627177794, now seen corresponding path program 1 times [2022-11-18 18:59:32,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:59:32,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [569758634] [2022-11-18 18:59:32,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:59:32,093 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:59:32,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:59:32,094 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:59:32,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-18 18:59:32,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:59:32,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-18 18:59:32,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:59:38,834 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-18 18:59:38,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:00:02,249 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-18 19:00:02,249 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:00:02,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [569758634] [2022-11-18 19:00:02,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [569758634] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:00:02,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:00:02,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 44 [2022-11-18 19:00:02,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670338886] [2022-11-18 19:00:02,250 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:00:02,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-18 19:00:02,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:00:02,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-18 19:00:02,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1655, Unknown=0, NotChecked=0, Total=1892 [2022-11-18 19:00:02,251 INFO L87 Difference]: Start difference. First operand 139 states and 186 transitions. Second operand has 44 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 41 states have internal predecessors, (73), 10 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2022-11-18 19:00:07,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 19:00:09,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 19:00:43,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 19:00:45,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 19:00:54,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:00:54,208 INFO L93 Difference]: Finished difference Result 170 states and 219 transitions. [2022-11-18 19:00:54,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-18 19:00:54,210 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 41 states have internal predecessors, (73), 10 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) Word has length 82 [2022-11-18 19:00:54,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:00:54,211 INFO L225 Difference]: With dead ends: 170 [2022-11-18 19:00:54,211 INFO L226 Difference]: Without dead ends: 157 [2022-11-18 19:00:54,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 49.5s TimeCoverageRelationStatistics Valid=787, Invalid=5065, Unknown=0, NotChecked=0, Total=5852 [2022-11-18 19:00:54,215 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 328 mSDsluCounter, 1190 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 1255 SdHoareTripleChecker+Invalid, 1653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:00:54,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 1255 Invalid, 1653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1503 Invalid, 0 Unknown, 0 Unchecked, 25.1s Time] [2022-11-18 19:00:54,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-11-18 19:00:54,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 141. [2022-11-18 19:00:54,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 107 states have (on average 1.158878504672897) internal successors, (124), 109 states have internal predecessors, (124), 21 states have call successors, (21), 9 states have call predecessors, (21), 12 states have return successors, (41), 22 states have call predecessors, (41), 20 states have call successors, (41) [2022-11-18 19:00:54,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 186 transitions. [2022-11-18 19:00:54,255 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 186 transitions. Word has length 82 [2022-11-18 19:00:54,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:00:54,255 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 186 transitions. [2022-11-18 19:00:54,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 41 states have internal predecessors, (73), 10 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2022-11-18 19:00:54,256 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 186 transitions. [2022-11-18 19:00:54,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-18 19:00:54,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:00:54,262 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 19:00:54,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-18 19:00:54,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:00:54,476 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:00:54,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:00:54,477 INFO L85 PathProgramCache]: Analyzing trace with hash 749736082, now seen corresponding path program 1 times [2022-11-18 19:00:54,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:00:54,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [486165765] [2022-11-18 19:00:54,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:00:54,478 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:00:54,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:00:54,479 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:00:54,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:00:54,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:00:54,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 19:00:54,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:00:56,911 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-18 19:00:56,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:01:02,509 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-18 19:01:02,509 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:01:02,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [486165765] [2022-11-18 19:01:02,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [486165765] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:01:02,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:01:02,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2022-11-18 19:01:02,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360150735] [2022-11-18 19:01:02,510 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:01:02,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-18 19:01:02,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:01:02,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-18 19:01:02,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-11-18 19:01:02,511 INFO L87 Difference]: Start difference. First operand 141 states and 186 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-18 19:01:11,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:01:11,960 INFO L93 Difference]: Finished difference Result 160 states and 206 transitions. [2022-11-18 19:01:11,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 19:01:11,962 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) Word has length 79 [2022-11-18 19:01:11,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:01:11,964 INFO L225 Difference]: With dead ends: 160 [2022-11-18 19:01:11,964 INFO L226 Difference]: Without dead ends: 131 [2022-11-18 19:01:11,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=323, Invalid=1399, Unknown=0, NotChecked=0, Total=1722 [2022-11-18 19:01:11,965 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 221 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:01:11,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 829 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-11-18 19:01:11,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-18 19:01:11,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 126. [2022-11-18 19:01:11,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 97 states have internal predecessors, (109), 19 states have call successors, (19), 8 states have call predecessors, (19), 11 states have return successors, (38), 20 states have call predecessors, (38), 18 states have call successors, (38) [2022-11-18 19:01:12,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 166 transitions. [2022-11-18 19:01:12,000 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 166 transitions. Word has length 79 [2022-11-18 19:01:12,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:01:12,001 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 166 transitions. [2022-11-18 19:01:12,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-18 19:01:12,001 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 166 transitions. [2022-11-18 19:01:12,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-18 19:01:12,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:01:12,003 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 19:01:12,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 19:01:12,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:01:12,230 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:01:12,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:01:12,230 INFO L85 PathProgramCache]: Analyzing trace with hash -2114830850, now seen corresponding path program 2 times [2022-11-18 19:01:12,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:01:12,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [362808890] [2022-11-18 19:01:12,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:01:12,231 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:01:12,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:01:12,232 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:01:12,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:01:12,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:01:12,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:01:12,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-18 19:01:12,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:01:19,083 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-18 19:01:19,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:01:43,496 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-18 19:01:43,497 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:01:43,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [362808890] [2022-11-18 19:01:43,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [362808890] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:01:43,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:01:43,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 44 [2022-11-18 19:01:43,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121713938] [2022-11-18 19:01:43,497 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:01:43,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-18 19:01:43,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:01:43,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-18 19:01:43,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1665, Unknown=0, NotChecked=0, Total=1892 [2022-11-18 19:01:43,500 INFO L87 Difference]: Start difference. First operand 126 states and 166 transitions. Second operand has 44 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 41 states have internal predecessors, (73), 10 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2022-11-18 19:02:16,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 19:02:30,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 19:02:37,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 19:02:44,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:02:44,698 INFO L93 Difference]: Finished difference Result 161 states and 204 transitions. [2022-11-18 19:02:44,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-18 19:02:44,700 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 41 states have internal predecessors, (73), 10 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) Word has length 82 [2022-11-18 19:02:44,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:02:44,701 INFO L225 Difference]: With dead ends: 161 [2022-11-18 19:02:44,702 INFO L226 Difference]: Without dead ends: 148 [2022-11-18 19:02:44,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 59.5s TimeCoverageRelationStatistics Valid=834, Invalid=5808, Unknown=0, NotChecked=0, Total=6642 [2022-11-18 19:02:44,703 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 283 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 1683 mSolverCounterSat, 149 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 1167 SdHoareTripleChecker+Invalid, 1833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1683 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:02:44,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 1167 Invalid, 1833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1683 Invalid, 1 Unknown, 0 Unchecked, 25.1s Time] [2022-11-18 19:02:44,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-18 19:02:44,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 127. [2022-11-18 19:02:44,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 96 states have (on average 1.1458333333333333) internal successors, (110), 98 states have internal predecessors, (110), 19 states have call successors, (19), 8 states have call predecessors, (19), 11 states have return successors, (37), 20 states have call predecessors, (37), 18 states have call successors, (37) [2022-11-18 19:02:44,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 166 transitions. [2022-11-18 19:02:44,757 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 166 transitions. Word has length 82 [2022-11-18 19:02:44,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:02:44,757 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 166 transitions. [2022-11-18 19:02:44,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 41 states have internal predecessors, (73), 10 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2022-11-18 19:02:44,758 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 166 transitions. [2022-11-18 19:02:44,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-18 19:02:44,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:02:44,759 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 19:02:44,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 19:02:44,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:02:44,980 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:02:44,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:02:44,980 INFO L85 PathProgramCache]: Analyzing trace with hash -2142271786, now seen corresponding path program 2 times [2022-11-18 19:02:44,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:02:44,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1326875686] [2022-11-18 19:02:44,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:02:44,981 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:02:44,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:02:44,982 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:02:44,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-18 19:02:45,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:02:45,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:02:45,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-18 19:02:45,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:02:47,739 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-18 19:02:47,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:02:53,884 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-18 19:02:53,884 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:02:53,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1326875686] [2022-11-18 19:02:53,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1326875686] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:02:53,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:02:53,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2022-11-18 19:02:53,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256103073] [2022-11-18 19:02:53,885 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:02:53,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-18 19:02:53,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:02:53,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-18 19:02:53,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-11-18 19:02:53,886 INFO L87 Difference]: Start difference. First operand 127 states and 166 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-18 19:03:06,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:03:06,049 INFO L93 Difference]: Finished difference Result 141 states and 180 transitions. [2022-11-18 19:03:06,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 19:03:06,052 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) Word has length 79 [2022-11-18 19:03:06,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:03:06,054 INFO L225 Difference]: With dead ends: 141 [2022-11-18 19:03:06,054 INFO L226 Difference]: Without dead ends: 112 [2022-11-18 19:03:06,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=381, Invalid=1689, Unknown=0, NotChecked=0, Total=2070 [2022-11-18 19:03:06,056 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 164 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:03:06,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 861 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-18 19:03:06,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-18 19:03:06,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-11-18 19:03:06,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 84 states have (on average 1.1547619047619047) internal successors, (97), 86 states have internal predecessors, (97), 17 states have call successors, (17), 7 states have call predecessors, (17), 10 states have return successors, (34), 18 states have call predecessors, (34), 16 states have call successors, (34) [2022-11-18 19:03:06,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 148 transitions. [2022-11-18 19:03:06,095 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 148 transitions. Word has length 79 [2022-11-18 19:03:06,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:03:06,096 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 148 transitions. [2022-11-18 19:03:06,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-18 19:03:06,096 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 148 transitions. [2022-11-18 19:03:06,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-18 19:03:06,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:03:06,097 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 19:03:06,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 19:03:06,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:03:06,303 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:03:06,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:03:06,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1402295107, now seen corresponding path program 1 times [2022-11-18 19:03:06,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:03:06,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [868968184] [2022-11-18 19:03:06,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:03:06,304 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:03:06,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:03:06,305 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:03:06,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:03:06,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:03:06,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 19:03:06,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:03:07,286 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-18 19:03:07,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:03:09,026 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-18 19:03:09,027 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:03:09,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [868968184] [2022-11-18 19:03:09,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [868968184] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:03:09,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:03:09,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-11-18 19:03:09,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066802539] [2022-11-18 19:03:09,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:03:09,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 19:03:09,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:03:09,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 19:03:09,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-18 19:03:09,029 INFO L87 Difference]: Start difference. First operand 112 states and 148 transitions. Second operand has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-18 19:03:11,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:03:11,746 INFO L93 Difference]: Finished difference Result 121 states and 156 transitions. [2022-11-18 19:03:11,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 19:03:11,747 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 83 [2022-11-18 19:03:11,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:03:11,749 INFO L225 Difference]: With dead ends: 121 [2022-11-18 19:03:11,749 INFO L226 Difference]: Without dead ends: 108 [2022-11-18 19:03:11,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2022-11-18 19:03:11,750 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 146 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-18 19:03:11,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 583 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-18 19:03:11,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-18 19:03:11,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-11-18 19:03:11,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 81 states have (on average 1.1604938271604939) internal successors, (94), 84 states have internal predecessors, (94), 16 states have call successors, (16), 6 states have call predecessors, (16), 10 states have return successors, (32), 17 states have call predecessors, (32), 15 states have call successors, (32) [2022-11-18 19:03:11,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 142 transitions. [2022-11-18 19:03:11,794 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 142 transitions. Word has length 83 [2022-11-18 19:03:11,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:03:11,795 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 142 transitions. [2022-11-18 19:03:11,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-18 19:03:11,795 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 142 transitions. [2022-11-18 19:03:11,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-18 19:03:11,796 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:03:11,796 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 19:03:11,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 19:03:12,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:03:12,011 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:03:12,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:03:12,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1128450436, now seen corresponding path program 1 times [2022-11-18 19:03:12,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:03:12,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2100371216] [2022-11-18 19:03:12,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:03:12,012 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:03:12,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:03:12,013 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:03:12,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:03:12,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:03:12,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-18 19:03:12,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:03:16,756 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-18 19:03:16,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:03:27,396 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-18 19:03:27,396 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:03:27,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2100371216] [2022-11-18 19:03:27,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2100371216] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:03:27,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:03:27,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2022-11-18 19:03:27,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360746801] [2022-11-18 19:03:27,397 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:03:27,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-18 19:03:27,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:03:27,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-18 19:03:27,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2022-11-18 19:03:27,399 INFO L87 Difference]: Start difference. First operand 108 states and 142 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 10 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) [2022-11-18 19:03:58,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:03:58,604 INFO L93 Difference]: Finished difference Result 160 states and 203 transitions. [2022-11-18 19:03:58,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-18 19:03:58,607 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 10 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) Word has length 80 [2022-11-18 19:03:58,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:03:58,608 INFO L225 Difference]: With dead ends: 160 [2022-11-18 19:03:58,608 INFO L226 Difference]: Without dead ends: 134 [2022-11-18 19:03:58,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 27.9s TimeCoverageRelationStatistics Valid=641, Invalid=3391, Unknown=0, NotChecked=0, Total=4032 [2022-11-18 19:03:58,610 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 177 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 1206 SdHoareTripleChecker+Invalid, 1350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:03:58,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 1206 Invalid, 1350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1247 Invalid, 0 Unknown, 0 Unchecked, 13.4s Time] [2022-11-18 19:03:58,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-18 19:03:58,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 120. [2022-11-18 19:03:58,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 91 states have (on average 1.1538461538461537) internal successors, (105), 93 states have internal predecessors, (105), 18 states have call successors, (18), 7 states have call predecessors, (18), 10 states have return successors, (34), 19 states have call predecessors, (34), 17 states have call successors, (34) [2022-11-18 19:03:58,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 157 transitions. [2022-11-18 19:03:58,649 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 157 transitions. Word has length 80 [2022-11-18 19:03:58,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:03:58,650 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 157 transitions. [2022-11-18 19:03:58,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 10 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) [2022-11-18 19:03:58,650 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 157 transitions. [2022-11-18 19:03:58,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-18 19:03:58,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:03:58,651 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 19:03:58,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 19:03:58,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:03:58,866 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:03:58,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:03:58,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1440446079, now seen corresponding path program 2 times [2022-11-18 19:03:58,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:03:58,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [356870916] [2022-11-18 19:03:58,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:03:58,867 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:03:58,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:03:58,868 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:03:58,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-18 19:03:58,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:03:58,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:03:58,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 19:03:58,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:03:59,844 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-18 19:03:59,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:04:01,544 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-18 19:04:01,545 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:04:01,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [356870916] [2022-11-18 19:04:01,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [356870916] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:04:01,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:04:01,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-11-18 19:04:01,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995490555] [2022-11-18 19:04:01,545 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:04:01,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 19:04:01,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:04:01,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 19:04:01,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-18 19:04:01,547 INFO L87 Difference]: Start difference. First operand 120 states and 157 transitions. Second operand has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-18 19:04:04,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:04:04,541 INFO L93 Difference]: Finished difference Result 127 states and 163 transitions. [2022-11-18 19:04:04,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 19:04:04,542 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 83 [2022-11-18 19:04:04,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:04:04,543 INFO L225 Difference]: With dead ends: 127 [2022-11-18 19:04:04,543 INFO L226 Difference]: Without dead ends: 107 [2022-11-18 19:04:04,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2022-11-18 19:04:04,545 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 98 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:04:04,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 754 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-18 19:04:04,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-18 19:04:04,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-11-18 19:04:04,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 80 states have (on average 1.1625) internal successors, (93), 84 states have internal predecessors, (93), 16 states have call successors, (16), 6 states have call predecessors, (16), 10 states have return successors, (30), 16 states have call predecessors, (30), 15 states have call successors, (30) [2022-11-18 19:04:04,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 139 transitions. [2022-11-18 19:04:04,586 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 139 transitions. Word has length 83 [2022-11-18 19:04:04,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:04:04,586 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 139 transitions. [2022-11-18 19:04:04,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 15 states have internal predecessors, (67), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-18 19:04:04,587 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 139 transitions. [2022-11-18 19:04:04,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-18 19:04:04,588 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:04:04,588 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 19:04:04,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-18 19:04:04,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:04:04,803 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:04:04,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:04:04,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1457098876, now seen corresponding path program 2 times [2022-11-18 19:04:04,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:04:04,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [728862816] [2022-11-18 19:04:04,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:04:04,804 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:04:04,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:04:04,806 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:04:04,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-18 19:04:05,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:04:05,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:04:05,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-18 19:04:05,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:04:09,504 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-18 19:04:09,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:04:21,216 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-18 19:04:21,216 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:04:21,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [728862816] [2022-11-18 19:04:21,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [728862816] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:04:21,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:04:21,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2022-11-18 19:04:21,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882758360] [2022-11-18 19:04:21,217 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:04:21,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-18 19:04:21,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:04:21,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-18 19:04:21,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2022-11-18 19:04:21,219 INFO L87 Difference]: Start difference. First operand 107 states and 139 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 33 states have internal predecessors, (66), 10 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) [2022-11-18 19:04:58,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:04:58,849 INFO L93 Difference]: Finished difference Result 157 states and 195 transitions. [2022-11-18 19:04:58,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-18 19:04:58,851 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 33 states have internal predecessors, (66), 10 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) Word has length 80 [2022-11-18 19:04:58,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:04:58,852 INFO L225 Difference]: With dead ends: 157 [2022-11-18 19:04:58,852 INFO L226 Difference]: Without dead ends: 144 [2022-11-18 19:04:58,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 34.6s TimeCoverageRelationStatistics Valid=684, Invalid=3606, Unknown=0, NotChecked=0, Total=4290 [2022-11-18 19:04:58,853 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 215 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 1218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:04:58,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 1119 Invalid, 1218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1094 Invalid, 0 Unknown, 0 Unchecked, 14.1s Time] [2022-11-18 19:04:58,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-18 19:04:58,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 130. [2022-11-18 19:04:58,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 103 states have internal predecessors, (115), 19 states have call successors, (19), 7 states have call predecessors, (19), 11 states have return successors, (31), 19 states have call predecessors, (31), 18 states have call successors, (31) [2022-11-18 19:04:58,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 165 transitions. [2022-11-18 19:04:58,903 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 165 transitions. Word has length 80 [2022-11-18 19:04:58,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:04:58,904 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 165 transitions. [2022-11-18 19:04:58,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 33 states have internal predecessors, (66), 10 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) [2022-11-18 19:04:58,904 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 165 transitions. [2022-11-18 19:04:58,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-18 19:04:58,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:04:58,905 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 19:04:58,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-18 19:04:59,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:04:59,122 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:04:59,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:04:59,122 INFO L85 PathProgramCache]: Analyzing trace with hash 416569969, now seen corresponding path program 1 times [2022-11-18 19:04:59,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:04:59,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307746297] [2022-11-18 19:04:59,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:04:59,123 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:04:59,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:04:59,124 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:04:59,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed9faaa7-e319-4d25-a87a-1ecb74b61a50/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:04:59,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:04:59,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 19:04:59,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:05:00,128 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-18 19:05:00,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:05:01,885 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-18 19:05:01,886 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:05:01,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307746297] [2022-11-18 19:05:01,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307746297] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:05:01,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:05:01,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-11-18 19:05:01,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380568972] [2022-11-18 19:05:01,887 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:05:01,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 19:05:01,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:05:01,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 19:05:01,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-18 19:05:01,888 INFO L87 Difference]: Start difference. First operand 130 states and 165 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10)