./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label06.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce3e32c-a0b0-42e3-ab20-508e05a882ee/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce3e32c-a0b0-42e3-ab20-508e05a882ee/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce3e32c-a0b0-42e3-ab20-508e05a882ee/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce3e32c-a0b0-42e3-ab20-508e05a882ee/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label06.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce3e32c-a0b0-42e3-ab20-508e05a882ee/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce3e32c-a0b0-42e3-ab20-508e05a882ee/bin/uautomizer-tBqnrhUYjU --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 cea456f67feb38188f6439808015d2c119e11835019da04a482fe282ee9f77d0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:25:24,170 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:25:24,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:25:24,220 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:25:24,223 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:25:24,227 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:25:24,231 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:25:24,236 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:25:24,238 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:25:24,246 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:25:24,247 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:25:24,248 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:25:24,249 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:25:24,251 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:25:24,253 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:25:24,257 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:25:24,258 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:25:24,259 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:25:24,265 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:25:24,269 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:25:24,273 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:25:24,275 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:25:24,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:25:24,279 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:25:24,285 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:25:24,286 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:25:24,286 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:25:24,288 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:25:24,289 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:25:24,290 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:25:24,290 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:25:24,291 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:25:24,293 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:25:24,294 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:25:24,296 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:25:24,296 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:25:24,297 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:25:24,297 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:25:24,297 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:25:24,298 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:25:24,299 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:25:24,299 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce3e32c-a0b0-42e3-ab20-508e05a882ee/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:25:24,340 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:25:24,340 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:25:24,341 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:25:24,341 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:25:24,343 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:25:24,343 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:25:24,343 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:25:24,344 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:25:24,344 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:25:24,344 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:25:24,345 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:25:24,345 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:25:24,346 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:25:24,346 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:25:24,346 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:25:24,346 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:25:24,346 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:25:24,347 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:25:24,347 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:25:24,347 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:25:24,347 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:25:24,348 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:25:24,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:25:24,348 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:25:24,348 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:25:24,349 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:25:24,349 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:25:24,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:25:24,349 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:25:24,349 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:25:24,350 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:25:24,350 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:25:24,350 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_1ce3e32c-a0b0-42e3-ab20-508e05a882ee/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce3e32c-a0b0-42e3-ab20-508e05a882ee/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cea456f67feb38188f6439808015d2c119e11835019da04a482fe282ee9f77d0 [2021-11-02 22:25:24,614 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:25:24,641 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:25:24,644 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:25:24,645 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:25:24,647 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:25:24,647 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce3e32c-a0b0-42e3-ab20-508e05a882ee/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label06.c [2021-11-02 22:25:24,723 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce3e32c-a0b0-42e3-ab20-508e05a882ee/bin/uautomizer-tBqnrhUYjU/data/281d81833/8c0370bbb3e34930891f3d6681a3db07/FLAGce7ae3c86 [2021-11-02 22:25:25,487 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:25:25,489 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce3e32c-a0b0-42e3-ab20-508e05a882ee/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label06.c [2021-11-02 22:25:25,523 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce3e32c-a0b0-42e3-ab20-508e05a882ee/bin/uautomizer-tBqnrhUYjU/data/281d81833/8c0370bbb3e34930891f3d6681a3db07/FLAGce7ae3c86 [2021-11-02 22:25:26,030 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce3e32c-a0b0-42e3-ab20-508e05a882ee/bin/uautomizer-tBqnrhUYjU/data/281d81833/8c0370bbb3e34930891f3d6681a3db07 [2021-11-02 22:25:26,033 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:25:26,035 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:25:26,036 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:25:26,037 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:25:26,041 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:25:26,041 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:25:26" (1/1) ... [2021-11-02 22:25:26,043 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53967187 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:25:26, skipping insertion in model container [2021-11-02 22:25:26,043 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:25:26" (1/1) ... [2021-11-02 22:25:26,051 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:25:26,190 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:25:26,542 WARN L228 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_1ce3e32c-a0b0-42e3-ab20-508e05a882ee/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label06.c[11730,11743] [2021-11-02 22:25:26,602 WARN L228 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_1ce3e32c-a0b0-42e3-ab20-508e05a882ee/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label06.c[14304,14317] [2021-11-02 22:25:27,527 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:25:27,538 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:25:27,597 WARN L228 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_1ce3e32c-a0b0-42e3-ab20-508e05a882ee/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label06.c[11730,11743] [2021-11-02 22:25:27,605 WARN L228 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_1ce3e32c-a0b0-42e3-ab20-508e05a882ee/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label06.c[14304,14317] [2021-11-02 22:25:28,205 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:25:28,238 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:25:28,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:25:28 WrapperNode [2021-11-02 22:25:28,239 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:25:28,240 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:25:28,240 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:25:28,240 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:25:28,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:25:28" (1/1) ... [2021-11-02 22:25:28,349 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:25:28" (1/1) ... [2021-11-02 22:25:28,763 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:25:28,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:25:28,764 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:25:28,764 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:25:28,773 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:25:28" (1/1) ... [2021-11-02 22:25:28,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:25:28" (1/1) ... [2021-11-02 22:25:28,821 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:25:28" (1/1) ... [2021-11-02 22:25:28,822 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:25:28" (1/1) ... [2021-11-02 22:25:29,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:25:28" (1/1) ... [2021-11-02 22:25:29,161 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:25:28" (1/1) ... [2021-11-02 22:25:29,219 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:25:28" (1/1) ... [2021-11-02 22:25:29,374 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:25:29,385 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:25:29,386 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:25:29,387 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:25:29,388 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:25:28" (1/1) ... [2021-11-02 22:25:29,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:25:29,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce3e32c-a0b0-42e3-ab20-508e05a882ee/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:25:29,473 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce3e32c-a0b0-42e3-ab20-508e05a882ee/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:25:29,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce3e32c-a0b0-42e3-ab20-508e05a882ee/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:25:29,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:25:29,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:25:29,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:25:29,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:25:34,305 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:25:34,305 INFO L299 CfgBuilder]: Removed 36 assume(true) statements. [2021-11-02 22:25:34,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:25:34 BoogieIcfgContainer [2021-11-02 22:25:34,309 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:25:34,311 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:25:34,312 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:25:34,315 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:25:34,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:25:26" (1/3) ... [2021-11-02 22:25:34,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3099c612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:25:34, skipping insertion in model container [2021-11-02 22:25:34,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:25:28" (2/3) ... [2021-11-02 22:25:34,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3099c612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:25:34, skipping insertion in model container [2021-11-02 22:25:34,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:25:34" (3/3) ... [2021-11-02 22:25:34,318 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label06.c [2021-11-02 22:25:34,327 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:25:34,327 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-02 22:25:34,398 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:25:34,408 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 22:25:34,408 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-02 22:25:34,455 INFO L276 IsEmpty]: Start isEmpty. Operand has 909 states, 906 states have (on average 1.900662251655629) internal successors, (1722), 908 states have internal predecessors, (1722), 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) [2021-11-02 22:25:34,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 22:25:34,467 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:25:34,467 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:25:34,468 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:25:34,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:34,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1870188587, now seen corresponding path program 1 times [2021-11-02 22:25:34,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:34,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79234829] [2021-11-02 22:25:34,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:34,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:34,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:34,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:34,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:34,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79234829] [2021-11-02 22:25:34,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79234829] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:34,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:34,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:25:34,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514569605] [2021-11-02 22:25:34,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:25:34,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:34,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:25:34,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:25:34,843 INFO L87 Difference]: Start difference. First operand has 909 states, 906 states have (on average 1.900662251655629) internal successors, (1722), 908 states have internal predecessors, (1722), 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) Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 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) [2021-11-02 22:25:39,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:25:39,136 INFO L93 Difference]: Finished difference Result 2552 states and 4892 transitions. [2021-11-02 22:25:39,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:25:39,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 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 24 [2021-11-02 22:25:39,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:25:39,164 INFO L225 Difference]: With dead ends: 2552 [2021-11-02 22:25:39,164 INFO L226 Difference]: Without dead ends: 1594 [2021-11-02 22:25:39,172 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:25:39,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2021-11-02 22:25:39,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1594. [2021-11-02 22:25:39,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1592 states have (on average 1.6130653266331658) internal successors, (2568), 1593 states have internal predecessors, (2568), 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) [2021-11-02 22:25:39,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2568 transitions. [2021-11-02 22:25:39,310 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2568 transitions. Word has length 24 [2021-11-02 22:25:39,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:25:39,311 INFO L470 AbstractCegarLoop]: Abstraction has 1594 states and 2568 transitions. [2021-11-02 22:25:39,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 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) [2021-11-02 22:25:39,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2568 transitions. [2021-11-02 22:25:39,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-02 22:25:39,314 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:25:39,315 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:25:39,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:25:39,316 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:25:39,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:39,319 INFO L85 PathProgramCache]: Analyzing trace with hash -950839655, now seen corresponding path program 1 times [2021-11-02 22:25:39,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:39,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505490437] [2021-11-02 22:25:39,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:39,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:39,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:39,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:39,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:39,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505490437] [2021-11-02 22:25:39,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505490437] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:39,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:39,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:25:39,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821114473] [2021-11-02 22:25:39,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:25:39,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:39,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:25:39,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:25:39,486 INFO L87 Difference]: Start difference. First operand 1594 states and 2568 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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) [2021-11-02 22:25:39,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:25:39,573 INFO L93 Difference]: Finished difference Result 1650 states and 2654 transitions. [2021-11-02 22:25:39,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:25:39,574 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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 34 [2021-11-02 22:25:39,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:25:39,585 INFO L225 Difference]: With dead ends: 1650 [2021-11-02 22:25:39,585 INFO L226 Difference]: Without dead ends: 1594 [2021-11-02 22:25:39,587 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:25:39,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2021-11-02 22:25:39,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1594. [2021-11-02 22:25:39,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1592 states have (on average 1.5935929648241205) internal successors, (2537), 1593 states have internal predecessors, (2537), 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) [2021-11-02 22:25:39,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2537 transitions. [2021-11-02 22:25:39,638 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2537 transitions. Word has length 34 [2021-11-02 22:25:39,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:25:39,639 INFO L470 AbstractCegarLoop]: Abstraction has 1594 states and 2537 transitions. [2021-11-02 22:25:39,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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) [2021-11-02 22:25:39,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2537 transitions. [2021-11-02 22:25:39,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 22:25:39,642 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:25:39,643 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:25:39,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:25:39,643 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:25:39,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:39,644 INFO L85 PathProgramCache]: Analyzing trace with hash -695028240, now seen corresponding path program 1 times [2021-11-02 22:25:39,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:39,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598012745] [2021-11-02 22:25:39,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:39,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:39,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:39,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:39,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:39,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598012745] [2021-11-02 22:25:39,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598012745] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:39,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:39,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:25:39,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927573161] [2021-11-02 22:25:39,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:25:39,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:39,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:25:39,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:25:39,726 INFO L87 Difference]: Start difference. First operand 1594 states and 2537 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-11-02 22:25:39,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:25:39,771 INFO L93 Difference]: Finished difference Result 1692 states and 2691 transitions. [2021-11-02 22:25:39,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:25:39,771 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-11-02 22:25:39,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:25:39,783 INFO L225 Difference]: With dead ends: 1692 [2021-11-02 22:25:39,783 INFO L226 Difference]: Without dead ends: 1640 [2021-11-02 22:25:39,785 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:25:39,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2021-11-02 22:25:39,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1638. [2021-11-02 22:25:39,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1636 states have (on average 1.593520782396088) internal successors, (2607), 1637 states have internal predecessors, (2607), 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) [2021-11-02 22:25:39,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 2607 transitions. [2021-11-02 22:25:39,840 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 2607 transitions. Word has length 64 [2021-11-02 22:25:39,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:25:39,841 INFO L470 AbstractCegarLoop]: Abstraction has 1638 states and 2607 transitions. [2021-11-02 22:25:39,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-11-02 22:25:39,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 2607 transitions. [2021-11-02 22:25:39,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 22:25:39,847 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:25:39,848 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:25:39,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:25:39,848 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:25:39,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:39,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1440610970, now seen corresponding path program 1 times [2021-11-02 22:25:39,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:39,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701812405] [2021-11-02 22:25:39,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:39,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:39,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:39,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:39,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:39,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701812405] [2021-11-02 22:25:39,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701812405] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:39,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:39,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:25:39,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461652683] [2021-11-02 22:25:39,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:25:39,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:39,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:25:39,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:25:39,977 INFO L87 Difference]: Start difference. First operand 1638 states and 2607 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-11-02 22:25:40,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:25:40,026 INFO L93 Difference]: Finished difference Result 1818 states and 2891 transitions. [2021-11-02 22:25:40,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:25:40,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-11-02 22:25:40,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:25:40,038 INFO L225 Difference]: With dead ends: 1818 [2021-11-02 22:25:40,039 INFO L226 Difference]: Without dead ends: 1722 [2021-11-02 22:25:40,041 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:25:40,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2021-11-02 22:25:40,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 1720. [2021-11-02 22:25:40,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1720 states, 1718 states have (on average 1.5925494761350407) internal successors, (2736), 1719 states have internal predecessors, (2736), 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) [2021-11-02 22:25:40,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1720 states to 1720 states and 2736 transitions. [2021-11-02 22:25:40,104 INFO L78 Accepts]: Start accepts. Automaton has 1720 states and 2736 transitions. Word has length 64 [2021-11-02 22:25:40,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:25:40,106 INFO L470 AbstractCegarLoop]: Abstraction has 1720 states and 2736 transitions. [2021-11-02 22:25:40,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-11-02 22:25:40,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1720 states and 2736 transitions. [2021-11-02 22:25:40,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 22:25:40,108 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:25:40,108 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:25:40,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:25:40,109 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:25:40,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:40,110 INFO L85 PathProgramCache]: Analyzing trace with hash 914325468, now seen corresponding path program 1 times [2021-11-02 22:25:40,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:40,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936742303] [2021-11-02 22:25:40,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:40,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:40,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:40,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:40,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:40,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936742303] [2021-11-02 22:25:40,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936742303] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:40,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:40,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:25:40,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603481443] [2021-11-02 22:25:40,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:25:40,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:40,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:25:40,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:25:40,211 INFO L87 Difference]: Start difference. First operand 1720 states and 2736 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-11-02 22:25:40,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:25:40,268 INFO L93 Difference]: Finished difference Result 2052 states and 3258 transitions. [2021-11-02 22:25:40,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:25:40,268 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-11-02 22:25:40,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:25:40,282 INFO L225 Difference]: With dead ends: 2052 [2021-11-02 22:25:40,282 INFO L226 Difference]: Without dead ends: 1874 [2021-11-02 22:25:40,283 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:25:40,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2021-11-02 22:25:40,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1872. [2021-11-02 22:25:40,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1872 states, 1870 states have (on average 1.5893048128342246) internal successors, (2972), 1871 states have internal predecessors, (2972), 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) [2021-11-02 22:25:40,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 2972 transitions. [2021-11-02 22:25:40,353 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 2972 transitions. Word has length 64 [2021-11-02 22:25:40,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:25:40,353 INFO L470 AbstractCegarLoop]: Abstraction has 1872 states and 2972 transitions. [2021-11-02 22:25:40,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-11-02 22:25:40,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 2972 transitions. [2021-11-02 22:25:40,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 22:25:40,356 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:25:40,356 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:25:40,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:25:40,357 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:25:40,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:40,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1701027568, now seen corresponding path program 1 times [2021-11-02 22:25:40,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:40,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704736464] [2021-11-02 22:25:40,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:40,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:40,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:40,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:40,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:40,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704736464] [2021-11-02 22:25:40,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704736464] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:40,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:40,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:25:40,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697300764] [2021-11-02 22:25:40,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:25:40,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:40,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:25:40,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:25:40,443 INFO L87 Difference]: Start difference. First operand 1872 states and 2972 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-11-02 22:25:40,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:25:40,500 INFO L93 Difference]: Finished difference Result 2484 states and 3926 transitions. [2021-11-02 22:25:40,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:25:40,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-11-02 22:25:40,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:25:40,514 INFO L225 Difference]: With dead ends: 2484 [2021-11-02 22:25:40,514 INFO L226 Difference]: Without dead ends: 2154 [2021-11-02 22:25:40,516 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:25:40,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2021-11-02 22:25:40,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 2152. [2021-11-02 22:25:40,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 2150 states have (on average 1.5813953488372092) internal successors, (3400), 2151 states have internal predecessors, (3400), 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) [2021-11-02 22:25:40,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 3400 transitions. [2021-11-02 22:25:40,593 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 3400 transitions. Word has length 64 [2021-11-02 22:25:40,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:25:40,593 INFO L470 AbstractCegarLoop]: Abstraction has 2152 states and 3400 transitions. [2021-11-02 22:25:40,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-11-02 22:25:40,594 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 3400 transitions. [2021-11-02 22:25:40,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 22:25:40,595 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:25:40,595 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:25:40,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 22:25:40,596 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:25:40,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:40,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1105068988, now seen corresponding path program 1 times [2021-11-02 22:25:40,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:40,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303523477] [2021-11-02 22:25:40,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:40,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:40,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:40,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:40,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:40,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303523477] [2021-11-02 22:25:40,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303523477] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:40,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:40,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:25:40,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680270119] [2021-11-02 22:25:40,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:25:40,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:40,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:25:40,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:25:40,652 INFO L87 Difference]: Start difference. First operand 2152 states and 3400 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-11-02 22:25:40,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:25:40,730 INFO L93 Difference]: Finished difference Result 3276 states and 5130 transitions. [2021-11-02 22:25:40,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:25:40,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-11-02 22:25:40,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:25:40,749 INFO L225 Difference]: With dead ends: 3276 [2021-11-02 22:25:40,749 INFO L226 Difference]: Without dead ends: 2666 [2021-11-02 22:25:40,752 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:25:40,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2666 states. [2021-11-02 22:25:40,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2666 to 2664. [2021-11-02 22:25:40,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2664 states, 2662 states have (on average 1.565740045078888) internal successors, (4168), 2663 states have internal predecessors, (4168), 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) [2021-11-02 22:25:40,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2664 states to 2664 states and 4168 transitions. [2021-11-02 22:25:40,893 INFO L78 Accepts]: Start accepts. Automaton has 2664 states and 4168 transitions. Word has length 64 [2021-11-02 22:25:40,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:25:40,895 INFO L470 AbstractCegarLoop]: Abstraction has 2664 states and 4168 transitions. [2021-11-02 22:25:40,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-11-02 22:25:40,895 INFO L276 IsEmpty]: Start isEmpty. Operand 2664 states and 4168 transitions. [2021-11-02 22:25:40,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 22:25:40,896 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:25:40,896 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:25:40,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 22:25:40,896 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:25:40,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:40,897 INFO L85 PathProgramCache]: Analyzing trace with hash 112916410, now seen corresponding path program 1 times [2021-11-02 22:25:40,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:40,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127782862] [2021-11-02 22:25:40,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:40,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:40,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:41,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:41,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:41,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127782862] [2021-11-02 22:25:41,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127782862] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:41,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:41,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:25:41,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577800376] [2021-11-02 22:25:41,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:25:41,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:41,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:25:41,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:25:41,018 INFO L87 Difference]: Start difference. First operand 2664 states and 4168 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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) [2021-11-02 22:25:41,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:25:41,627 INFO L93 Difference]: Finished difference Result 13884 states and 21298 transitions. [2021-11-02 22:25:41,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:25:41,628 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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 64 [2021-11-02 22:25:41,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:25:41,720 INFO L225 Difference]: With dead ends: 13884 [2021-11-02 22:25:41,720 INFO L226 Difference]: Without dead ends: 12762 [2021-11-02 22:25:41,726 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:25:41,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12762 states. [2021-11-02 22:25:42,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12762 to 3784. [2021-11-02 22:25:42,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3784 states, 3782 states have (on average 1.5378106821787414) internal successors, (5816), 3783 states have internal predecessors, (5816), 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) [2021-11-02 22:25:42,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 5816 transitions. [2021-11-02 22:25:42,031 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 5816 transitions. Word has length 64 [2021-11-02 22:25:42,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:25:42,031 INFO L470 AbstractCegarLoop]: Abstraction has 3784 states and 5816 transitions. [2021-11-02 22:25:42,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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) [2021-11-02 22:25:42,032 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 5816 transitions. [2021-11-02 22:25:42,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-02 22:25:42,032 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:25:42,033 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:25:42,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 22:25:42,033 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:25:42,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:42,034 INFO L85 PathProgramCache]: Analyzing trace with hash -277208054, now seen corresponding path program 1 times [2021-11-02 22:25:42,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:42,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942425464] [2021-11-02 22:25:42,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:42,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:42,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:42,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:42,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:42,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942425464] [2021-11-02 22:25:42,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942425464] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:42,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:42,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:25:42,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023153481] [2021-11-02 22:25:42,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:25:42,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:42,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:25:42,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:25:42,096 INFO L87 Difference]: Start difference. First operand 3784 states and 5816 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2021-11-02 22:25:42,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:25:42,302 INFO L93 Difference]: Finished difference Result 7070 states and 10732 transitions. [2021-11-02 22:25:42,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:25:42,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 66 [2021-11-02 22:25:42,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:25:42,313 INFO L225 Difference]: With dead ends: 7070 [2021-11-02 22:25:42,313 INFO L226 Difference]: Without dead ends: 4828 [2021-11-02 22:25:42,318 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:25:42,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4828 states. [2021-11-02 22:25:42,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4828 to 4826. [2021-11-02 22:25:42,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4824 states have (on average 1.5178275290215588) internal successors, (7322), 4825 states have internal predecessors, (7322), 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) [2021-11-02 22:25:42,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7322 transitions. [2021-11-02 22:25:42,650 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7322 transitions. Word has length 66 [2021-11-02 22:25:42,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:25:42,651 INFO L470 AbstractCegarLoop]: Abstraction has 4826 states and 7322 transitions. [2021-11-02 22:25:42,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2021-11-02 22:25:42,651 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7322 transitions. [2021-11-02 22:25:42,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-02 22:25:42,657 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:25:42,658 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:25:42,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 22:25:42,659 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:25:42,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:42,660 INFO L85 PathProgramCache]: Analyzing trace with hash -210714542, now seen corresponding path program 1 times [2021-11-02 22:25:42,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:42,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405722537] [2021-11-02 22:25:42,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:42,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:42,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:42,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:42,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405722537] [2021-11-02 22:25:42,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405722537] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:42,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:42,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:25:42,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840719029] [2021-11-02 22:25:42,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:25:42,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:42,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:25:42,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:25:42,887 INFO L87 Difference]: Start difference. First operand 4826 states and 7322 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 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) [2021-11-02 22:25:43,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:25:43,281 INFO L93 Difference]: Finished difference Result 8110 states and 12188 transitions. [2021-11-02 22:25:43,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:25:43,282 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 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 66 [2021-11-02 22:25:43,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:25:43,292 INFO L225 Difference]: With dead ends: 8110 [2021-11-02 22:25:43,292 INFO L226 Difference]: Without dead ends: 4828 [2021-11-02 22:25:43,298 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:25:43,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4828 states. [2021-11-02 22:25:43,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4828 to 4826. [2021-11-02 22:25:43,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4824 states have (on average 1.50787728026534) internal successors, (7274), 4825 states have internal predecessors, (7274), 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) [2021-11-02 22:25:43,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7274 transitions. [2021-11-02 22:25:43,549 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7274 transitions. Word has length 66 [2021-11-02 22:25:43,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:25:43,550 INFO L470 AbstractCegarLoop]: Abstraction has 4826 states and 7274 transitions. [2021-11-02 22:25:43,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 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) [2021-11-02 22:25:43,550 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7274 transitions. [2021-11-02 22:25:43,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-02 22:25:43,551 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:25:43,551 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:25:43,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 22:25:43,552 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:25:43,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:43,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1643060746, now seen corresponding path program 1 times [2021-11-02 22:25:43,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:43,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499857074] [2021-11-02 22:25:43,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:43,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:43,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:43,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:43,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:43,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499857074] [2021-11-02 22:25:43,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499857074] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:43,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:43,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:25:43,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076178829] [2021-11-02 22:25:43,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:25:43,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:43,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:25:43,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:25:43,651 INFO L87 Difference]: Start difference. First operand 4826 states and 7274 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 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) [2021-11-02 22:25:43,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:25:43,979 INFO L93 Difference]: Finished difference Result 8108 states and 12091 transitions. [2021-11-02 22:25:43,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:25:43,980 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 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 67 [2021-11-02 22:25:43,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:25:43,990 INFO L225 Difference]: With dead ends: 8108 [2021-11-02 22:25:43,990 INFO L226 Difference]: Without dead ends: 4826 [2021-11-02 22:25:43,996 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:25:44,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4826 states. [2021-11-02 22:25:44,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4826 to 4826. [2021-11-02 22:25:44,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4824 states have (on average 1.497927031509121) internal successors, (7226), 4825 states have internal predecessors, (7226), 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) [2021-11-02 22:25:44,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7226 transitions. [2021-11-02 22:25:44,327 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7226 transitions. Word has length 67 [2021-11-02 22:25:44,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:25:44,327 INFO L470 AbstractCegarLoop]: Abstraction has 4826 states and 7226 transitions. [2021-11-02 22:25:44,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 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) [2021-11-02 22:25:44,327 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7226 transitions. [2021-11-02 22:25:44,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-02 22:25:44,328 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:25:44,328 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:25:44,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 22:25:44,329 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:25:44,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:44,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1372042872, now seen corresponding path program 1 times [2021-11-02 22:25:44,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:44,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800748430] [2021-11-02 22:25:44,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:44,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:44,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:44,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:44,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:44,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800748430] [2021-11-02 22:25:44,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800748430] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:44,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:44,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:25:44,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101439167] [2021-11-02 22:25:44,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:25:44,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:44,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:25:44,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:25:44,414 INFO L87 Difference]: Start difference. First operand 4826 states and 7226 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 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) [2021-11-02 22:25:44,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:25:44,752 INFO L93 Difference]: Finished difference Result 8108 states and 11995 transitions. [2021-11-02 22:25:44,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:25:44,755 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 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 67 [2021-11-02 22:25:44,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:25:44,765 INFO L225 Difference]: With dead ends: 8108 [2021-11-02 22:25:44,765 INFO L226 Difference]: Without dead ends: 4826 [2021-11-02 22:25:44,770 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:25:44,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4826 states. [2021-11-02 22:25:45,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4826 to 4826. [2021-11-02 22:25:45,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4824 states have (on average 1.4879767827529022) internal successors, (7178), 4825 states have internal predecessors, (7178), 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) [2021-11-02 22:25:45,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7178 transitions. [2021-11-02 22:25:45,043 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7178 transitions. Word has length 67 [2021-11-02 22:25:45,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:25:45,043 INFO L470 AbstractCegarLoop]: Abstraction has 4826 states and 7178 transitions. [2021-11-02 22:25:45,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 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) [2021-11-02 22:25:45,044 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7178 transitions. [2021-11-02 22:25:45,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-02 22:25:45,044 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:25:45,045 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:25:45,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 22:25:45,045 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:25:45,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:45,046 INFO L85 PathProgramCache]: Analyzing trace with hash 316900870, now seen corresponding path program 1 times [2021-11-02 22:25:45,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:45,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946046396] [2021-11-02 22:25:45,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:45,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:45,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:45,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:45,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:45,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946046396] [2021-11-02 22:25:45,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946046396] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:45,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:45,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-02 22:25:45,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204237827] [2021-11-02 22:25:45,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:25:45,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:45,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:25:45,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:25:45,149 INFO L87 Difference]: Start difference. First operand 4826 states and 7178 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 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) [2021-11-02 22:25:45,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:25:45,801 INFO L93 Difference]: Finished difference Result 7669 states and 11152 transitions. [2021-11-02 22:25:45,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:25:45,802 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 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 67 [2021-11-02 22:25:45,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:25:45,819 INFO L225 Difference]: With dead ends: 7669 [2021-11-02 22:25:45,819 INFO L226 Difference]: Without dead ends: 7667 [2021-11-02 22:25:45,822 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:25:45,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7667 states. [2021-11-02 22:25:46,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7667 to 5018. [2021-11-02 22:25:46,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 5016 states have (on average 1.4661084529505581) internal successors, (7354), 5017 states have internal predecessors, (7354), 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) [2021-11-02 22:25:46,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 7354 transitions. [2021-11-02 22:25:46,225 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 7354 transitions. Word has length 67 [2021-11-02 22:25:46,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:25:46,226 INFO L470 AbstractCegarLoop]: Abstraction has 5018 states and 7354 transitions. [2021-11-02 22:25:46,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 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) [2021-11-02 22:25:46,226 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 7354 transitions. [2021-11-02 22:25:46,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-02 22:25:46,230 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:25:46,230 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:25:46,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 22:25:46,231 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:25:46,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:46,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1065285143, now seen corresponding path program 1 times [2021-11-02 22:25:46,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:46,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129355460] [2021-11-02 22:25:46,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:46,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:46,342 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 22:25:46,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:46,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129355460] [2021-11-02 22:25:46,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129355460] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:46,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:46,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:25:46,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585735958] [2021-11-02 22:25:46,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:25:46,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:46,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:25:46,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:25:46,345 INFO L87 Difference]: Start difference. First operand 5018 states and 7354 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 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) [2021-11-02 22:25:47,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:25:47,782 INFO L93 Difference]: Finished difference Result 23094 states and 32784 transitions. [2021-11-02 22:25:47,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:25:47,783 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 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 95 [2021-11-02 22:25:47,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:25:47,823 INFO L225 Difference]: With dead ends: 23094 [2021-11-02 22:25:47,824 INFO L226 Difference]: Without dead ends: 19620 [2021-11-02 22:25:47,834 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:25:47,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19620 states. [2021-11-02 22:25:48,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19620 to 8490. [2021-11-02 22:25:48,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8490 states, 8488 states have (on average 1.4375589066918002) internal successors, (12202), 8489 states have internal predecessors, (12202), 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) [2021-11-02 22:25:48,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8490 states to 8490 states and 12202 transitions. [2021-11-02 22:25:48,505 INFO L78 Accepts]: Start accepts. Automaton has 8490 states and 12202 transitions. Word has length 95 [2021-11-02 22:25:48,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:25:48,505 INFO L470 AbstractCegarLoop]: Abstraction has 8490 states and 12202 transitions. [2021-11-02 22:25:48,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 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) [2021-11-02 22:25:48,505 INFO L276 IsEmpty]: Start isEmpty. Operand 8490 states and 12202 transitions. [2021-11-02 22:25:48,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-02 22:25:48,509 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:25:48,510 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:25:48,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 22:25:48,510 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:25:48,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:48,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1460899337, now seen corresponding path program 1 times [2021-11-02 22:25:48,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:48,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57085989] [2021-11-02 22:25:48,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:48,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:48,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:48,612 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-02 22:25:48,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:48,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57085989] [2021-11-02 22:25:48,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57085989] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:48,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:48,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:25:48,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751952978] [2021-11-02 22:25:48,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:25:48,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:48,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:25:48,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:25:48,615 INFO L87 Difference]: Start difference. First operand 8490 states and 12202 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 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) [2021-11-02 22:25:49,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:25:49,873 INFO L93 Difference]: Finished difference Result 26566 states and 37632 transitions. [2021-11-02 22:25:49,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:25:49,874 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 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 95 [2021-11-02 22:25:49,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:25:49,920 INFO L225 Difference]: With dead ends: 26566 [2021-11-02 22:25:49,920 INFO L226 Difference]: Without dead ends: 23092 [2021-11-02 22:25:49,930 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:25:49,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23092 states. [2021-11-02 22:25:50,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23092 to 13706. [2021-11-02 22:25:50,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13706 states, 13704 states have (on average 1.4181260945709282) internal successors, (19434), 13705 states have internal predecessors, (19434), 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) [2021-11-02 22:25:50,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13706 states to 13706 states and 19434 transitions. [2021-11-02 22:25:50,925 INFO L78 Accepts]: Start accepts. Automaton has 13706 states and 19434 transitions. Word has length 95 [2021-11-02 22:25:50,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:25:50,926 INFO L470 AbstractCegarLoop]: Abstraction has 13706 states and 19434 transitions. [2021-11-02 22:25:50,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 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) [2021-11-02 22:25:50,926 INFO L276 IsEmpty]: Start isEmpty. Operand 13706 states and 19434 transitions. [2021-11-02 22:25:50,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-02 22:25:50,932 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:25:50,932 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:25:50,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-02 22:25:50,933 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:25:50,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:50,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1702428119, now seen corresponding path program 1 times [2021-11-02 22:25:50,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:50,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377858454] [2021-11-02 22:25:50,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:50,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:50,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:51,033 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 22:25:51,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:51,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377858454] [2021-11-02 22:25:51,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377858454] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:51,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:51,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:25:51,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407465485] [2021-11-02 22:25:51,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:25:51,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:51,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:25:51,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:25:51,038 INFO L87 Difference]: Start difference. First operand 13706 states and 19434 transitions. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 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) [2021-11-02 22:25:52,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:25:52,529 INFO L93 Difference]: Finished difference Result 30038 states and 42480 transitions. [2021-11-02 22:25:52,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:25:52,530 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 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 95 [2021-11-02 22:25:52,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:25:52,585 INFO L225 Difference]: With dead ends: 30038 [2021-11-02 22:25:52,585 INFO L226 Difference]: Without dead ends: 26564 [2021-11-02 22:25:52,597 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:25:52,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26564 states. [2021-11-02 22:25:53,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26564 to 17178. [2021-11-02 22:25:53,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17178 states, 17176 states have (on average 1.413716814159292) internal successors, (24282), 17177 states have internal predecessors, (24282), 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) [2021-11-02 22:25:53,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17178 states to 17178 states and 24282 transitions. [2021-11-02 22:25:53,650 INFO L78 Accepts]: Start accepts. Automaton has 17178 states and 24282 transitions. Word has length 95 [2021-11-02 22:25:53,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:25:53,651 INFO L470 AbstractCegarLoop]: Abstraction has 17178 states and 24282 transitions. [2021-11-02 22:25:53,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 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) [2021-11-02 22:25:53,651 INFO L276 IsEmpty]: Start isEmpty. Operand 17178 states and 24282 transitions. [2021-11-02 22:25:53,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-02 22:25:53,656 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:25:53,656 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:25:53,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-02 22:25:53,657 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:25:53,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:53,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1357080137, now seen corresponding path program 1 times [2021-11-02 22:25:53,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:53,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996208717] [2021-11-02 22:25:53,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:53,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:53,744 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:25:53,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:53,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996208717] [2021-11-02 22:25:53,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996208717] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:53,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:53,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:25:53,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217080913] [2021-11-02 22:25:53,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:25:53,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:53,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:25:53,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:25:53,747 INFO L87 Difference]: Start difference. First operand 17178 states and 24282 transitions. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 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) [2021-11-02 22:25:55,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:25:55,337 INFO L93 Difference]: Finished difference Result 33510 states and 47328 transitions. [2021-11-02 22:25:55,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:25:55,337 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 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 95 [2021-11-02 22:25:55,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:25:55,476 INFO L225 Difference]: With dead ends: 33510 [2021-11-02 22:25:55,476 INFO L226 Difference]: Without dead ends: 30036 [2021-11-02 22:25:55,485 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:25:55,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30036 states. [2021-11-02 22:25:56,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30036 to 20650. [2021-11-02 22:25:56,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20650 states, 20648 states have (on average 1.4107903913211934) internal successors, (29130), 20649 states have internal predecessors, (29130), 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) [2021-11-02 22:25:56,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20650 states to 20650 states and 29130 transitions. [2021-11-02 22:25:56,924 INFO L78 Accepts]: Start accepts. Automaton has 20650 states and 29130 transitions. Word has length 95 [2021-11-02 22:25:56,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:25:56,927 INFO L470 AbstractCegarLoop]: Abstraction has 20650 states and 29130 transitions. [2021-11-02 22:25:56,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 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) [2021-11-02 22:25:56,927 INFO L276 IsEmpty]: Start isEmpty. Operand 20650 states and 29130 transitions. [2021-11-02 22:25:56,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-02 22:25:56,941 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:25:56,941 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:25:56,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-02 22:25:56,942 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:25:56,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:56,942 INFO L85 PathProgramCache]: Analyzing trace with hash -63915415, now seen corresponding path program 1 times [2021-11-02 22:25:56,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:56,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992235912] [2021-11-02 22:25:56,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:56,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:56,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:57,038 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:25:57,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:57,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992235912] [2021-11-02 22:25:57,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992235912] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:57,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:57,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:25:57,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388478701] [2021-11-02 22:25:57,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:25:57,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:57,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:25:57,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:25:57,042 INFO L87 Difference]: Start difference. First operand 20650 states and 29130 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 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) [2021-11-02 22:25:58,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:25:58,914 INFO L93 Difference]: Finished difference Result 34902 states and 49296 transitions. [2021-11-02 22:25:58,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:25:58,915 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 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 95 [2021-11-02 22:25:58,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:25:58,964 INFO L225 Difference]: With dead ends: 34902 [2021-11-02 22:25:58,965 INFO L226 Difference]: Without dead ends: 32468 [2021-11-02 22:25:59,072 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:25:59,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32468 states. [2021-11-02 22:26:00,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32468 to 23082. [2021-11-02 22:26:00,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23082 states, 23080 states have (on average 1.410485268630849) internal successors, (32554), 23081 states have internal predecessors, (32554), 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) [2021-11-02 22:26:00,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23082 states to 23082 states and 32554 transitions. [2021-11-02 22:26:00,497 INFO L78 Accepts]: Start accepts. Automaton has 23082 states and 32554 transitions. Word has length 95 [2021-11-02 22:26:00,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:26:00,497 INFO L470 AbstractCegarLoop]: Abstraction has 23082 states and 32554 transitions. [2021-11-02 22:26:00,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 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) [2021-11-02 22:26:00,498 INFO L276 IsEmpty]: Start isEmpty. Operand 23082 states and 32554 transitions. [2021-11-02 22:26:00,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-02 22:26:00,503 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:26:00,503 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:26:00,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-02 22:26:00,504 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:26:00,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:26:00,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1416628636, now seen corresponding path program 1 times [2021-11-02 22:26:00,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:26:00,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604346842] [2021-11-02 22:26:00,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:26:00,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:26:00,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:26:00,610 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:26:00,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:26:00,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604346842] [2021-11-02 22:26:00,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604346842] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:26:00,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035364893] [2021-11-02 22:26:00,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:26:00,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:26:00,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce3e32c-a0b0-42e3-ab20-508e05a882ee/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:26:00,617 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce3e32c-a0b0-42e3-ab20-508e05a882ee/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:26:00,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce3e32c-a0b0-42e3-ab20-508e05a882ee/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:26:00,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:26:00,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 22:26:00,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:26:01,424 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:26:01,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035364893] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:26:01,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:26:01,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7] total 9 [2021-11-02 22:26:01,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812900340] [2021-11-02 22:26:01,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:26:01,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:26:01,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:26:01,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:26:01,427 INFO L87 Difference]: Start difference. First operand 23082 states and 32554 transitions. Second operand has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 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) [2021-11-02 22:26:04,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:26:04,677 INFO L93 Difference]: Finished difference Result 55574 states and 78198 transitions. [2021-11-02 22:26:04,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:26:04,678 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 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 96 [2021-11-02 22:26:04,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:26:04,730 INFO L225 Difference]: With dead ends: 55574 [2021-11-02 22:26:04,730 INFO L226 Difference]: Without dead ends: 39764 [2021-11-02 22:26:04,755 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:26:04,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39764 states. [2021-11-02 22:26:07,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39764 to 36538. [2021-11-02 22:26:07,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36538 states, 36536 states have (on average 1.3950624042040727) internal successors, (50970), 36537 states have internal predecessors, (50970), 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) [2021-11-02 22:26:07,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36538 states to 36538 states and 50970 transitions. [2021-11-02 22:26:07,288 INFO L78 Accepts]: Start accepts. Automaton has 36538 states and 50970 transitions. Word has length 96 [2021-11-02 22:26:07,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:26:07,288 INFO L470 AbstractCegarLoop]: Abstraction has 36538 states and 50970 transitions. [2021-11-02 22:26:07,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.22222222222222) internal successors, (182), 9 states have internal predecessors, (182), 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) [2021-11-02 22:26:07,288 INFO L276 IsEmpty]: Start isEmpty. Operand 36538 states and 50970 transitions. [2021-11-02 22:26:07,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-02 22:26:07,295 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:26:07,295 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:26:07,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce3e32c-a0b0-42e3-ab20-508e05a882ee/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:26:07,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce3e32c-a0b0-42e3-ab20-508e05a882ee/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:26:07,512 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:26:07,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:26:07,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1408959169, now seen corresponding path program 1 times [2021-11-02 22:26:07,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:26:07,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804102306] [2021-11-02 22:26:07,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:26:07,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:26:07,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:26:07,788 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:26:07,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:26:07,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804102306] [2021-11-02 22:26:07,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804102306] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:26:07,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404356955] [2021-11-02 22:26:07,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:26:07,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:26:07,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce3e32c-a0b0-42e3-ab20-508e05a882ee/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:26:07,796 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce3e32c-a0b0-42e3-ab20-508e05a882ee/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:26:07,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce3e32c-a0b0-42e3-ab20-508e05a882ee/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:26:07,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:26:07,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 22:26:07,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:26:09,256 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:26:09,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404356955] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:26:09,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:26:09,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2021-11-02 22:26:09,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131141274] [2021-11-02 22:26:09,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 22:26:09,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:26:09,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 22:26:09,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-11-02 22:26:09,258 INFO L87 Difference]: Start difference. First operand 36538 states and 50970 transitions. Second operand has 22 states, 22 states have (on average 8.136363636363637) internal successors, (179), 21 states have internal predecessors, (179), 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)