./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd7c603-ed95-464e-b7b2-6f030292d935/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd7c603-ed95-464e-b7b2-6f030292d935/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd7c603-ed95-464e-b7b2-6f030292d935/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd7c603-ed95-464e-b7b2-6f030292d935/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd7c603-ed95-464e-b7b2-6f030292d935/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd7c603-ed95-464e-b7b2-6f030292d935/bin/uautomizer-ZXIjhQolGL --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 d14be9b096a9cbd7bae6b76d9713e8ec6e66d6633cec6a9d1cec5445761f8a9c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:35:06,116 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:35:06,119 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:35:06,163 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:35:06,164 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:35:06,169 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:35:06,171 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:35:06,175 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:35:06,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:35:06,186 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:35:06,187 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:35:06,189 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:35:06,189 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:35:06,193 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:35:06,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:35:06,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:35:06,199 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:35:06,200 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:35:06,202 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:35:06,204 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:35:06,206 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:35:06,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:35:06,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:35:06,210 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:35:06,214 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:35:06,214 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:35:06,214 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:35:06,216 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:35:06,216 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:35:06,217 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:35:06,218 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:35:06,219 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:35:06,220 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:35:06,220 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:35:06,226 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:35:06,226 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:35:06,227 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:35:06,227 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:35:06,228 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:35:06,229 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:35:06,230 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:35:06,232 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd7c603-ed95-464e-b7b2-6f030292d935/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 04:35:06,282 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:35:06,283 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:35:06,283 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:35:06,283 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:35:06,284 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:35:06,284 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:35:06,285 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:35:06,285 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:35:06,286 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:35:06,286 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:35:06,286 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:35:06,286 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:35:06,287 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:35:06,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:35:06,287 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 04:35:06,287 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:35:06,288 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 04:35:06,288 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:35:06,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 04:35:06,288 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:35:06,289 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 04:35:06,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:35:06,289 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:35:06,289 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:35:06,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:35:06,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:35:06,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:35:06,290 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 04:35:06,291 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:35:06,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:35:06,291 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 04:35:06,297 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 04:35:06,297 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 04:35:06,297 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:35:06,297 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_4dd7c603-ed95-464e-b7b2-6f030292d935/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd7c603-ed95-464e-b7b2-6f030292d935/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d14be9b096a9cbd7bae6b76d9713e8ec6e66d6633cec6a9d1cec5445761f8a9c [2021-11-19 04:35:06,546 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:35:06,566 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:35:06,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:35:06,571 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:35:06,572 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:35:06,573 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd7c603-ed95-464e-b7b2-6f030292d935/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c [2021-11-19 04:35:06,644 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd7c603-ed95-464e-b7b2-6f030292d935/bin/uautomizer-ZXIjhQolGL/data/9c427cb36/526854d3047e4ea5be3fad42357ce810/FLAGfb0f91250 [2021-11-19 04:35:07,322 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:35:07,323 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd7c603-ed95-464e-b7b2-6f030292d935/sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c [2021-11-19 04:35:07,348 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd7c603-ed95-464e-b7b2-6f030292d935/bin/uautomizer-ZXIjhQolGL/data/9c427cb36/526854d3047e4ea5be3fad42357ce810/FLAGfb0f91250 [2021-11-19 04:35:07,502 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd7c603-ed95-464e-b7b2-6f030292d935/bin/uautomizer-ZXIjhQolGL/data/9c427cb36/526854d3047e4ea5be3fad42357ce810 [2021-11-19 04:35:07,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:35:07,505 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 04:35:07,509 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:35:07,509 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:35:07,512 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:35:07,513 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:35:07" (1/1) ... [2021-11-19 04:35:07,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6900be1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:35:07, skipping insertion in model container [2021-11-19 04:35:07,515 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:35:07" (1/1) ... [2021-11-19 04:35:07,523 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:35:07,616 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:35:07,844 WARN L230 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_4dd7c603-ed95-464e-b7b2-6f030292d935/sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c[3233,3246] [2021-11-19 04:35:08,221 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:35:08,231 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:35:08,246 WARN L230 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_4dd7c603-ed95-464e-b7b2-6f030292d935/sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c[3233,3246] [2021-11-19 04:35:08,351 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:35:08,383 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:35:08,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:35:08 WrapperNode [2021-11-19 04:35:08,383 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:35:08,385 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 04:35:08,385 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 04:35:08,385 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 04:35:08,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:35:08" (1/1) ... [2021-11-19 04:35:08,461 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:35:08" (1/1) ... [2021-11-19 04:35:08,549 INFO L137 Inliner]: procedures = 97, calls = 361, calls flagged for inlining = 29, calls inlined = 25, statements flattened = 1010 [2021-11-19 04:35:08,549 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 04:35:08,550 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:35:08,550 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:35:08,550 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:35:08,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:35:08" (1/1) ... [2021-11-19 04:35:08,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:35:08" (1/1) ... [2021-11-19 04:35:08,577 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:35:08" (1/1) ... [2021-11-19 04:35:08,577 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:35:08" (1/1) ... [2021-11-19 04:35:08,615 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:35:08" (1/1) ... [2021-11-19 04:35:08,630 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:35:08" (1/1) ... [2021-11-19 04:35:08,635 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:35:08" (1/1) ... [2021-11-19 04:35:08,644 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:35:08,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:35:08,646 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:35:08,646 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:35:08,647 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:35:08" (1/1) ... [2021-11-19 04:35:08,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:35:08,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd7c603-ed95-464e-b7b2-6f030292d935/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:35:08,681 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd7c603-ed95-464e-b7b2-6f030292d935/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:35:08,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd7c603-ed95-464e-b7b2-6f030292d935/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:35:08,818 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-19 04:35:08,818 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-19 04:35:08,818 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 04:35:08,819 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 04:35:08,819 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 04:35:08,819 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 04:35:08,819 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-19 04:35:08,819 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-19 04:35:08,819 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 04:35:08,819 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 04:35:08,819 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 04:35:08,820 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 04:35:08,820 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 04:35:08,820 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 04:35:08,820 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-19 04:35:08,820 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-19 04:35:08,820 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-19 04:35:08,821 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-19 04:35:08,821 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 04:35:08,821 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 04:35:08,821 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 04:35:08,821 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 04:35:08,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:35:08,821 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-19 04:35:08,822 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-19 04:35:08,822 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-19 04:35:08,822 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-19 04:35:08,822 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-19 04:35:08,822 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-19 04:35:08,822 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-19 04:35:08,822 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-19 04:35:08,823 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 04:35:08,823 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 04:35:08,823 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 04:35:08,823 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 04:35:08,823 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 04:35:08,823 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 04:35:08,824 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 04:35:08,824 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 04:35:08,824 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2021-11-19 04:35:08,824 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2021-11-19 04:35:08,824 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 04:35:08,824 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 04:35:08,824 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2021-11-19 04:35:08,825 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2021-11-19 04:35:08,825 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 04:35:08,825 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 04:35:08,825 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 04:35:08,825 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 04:35:08,825 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 04:35:08,826 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 04:35:08,826 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 04:35:08,826 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 04:35:08,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 04:35:08,826 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 04:35:08,826 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 04:35:08,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:35:08,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:35:08,827 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 04:35:08,827 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 04:35:08,827 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-11-19 04:35:08,827 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-11-19 04:35:09,002 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:35:09,004 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:35:10,326 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:35:10,349 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:35:10,349 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 04:35:10,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:35:10 BoogieIcfgContainer [2021-11-19 04:35:10,353 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:35:10,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:35:10,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:35:10,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:35:10,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:35:07" (1/3) ... [2021-11-19 04:35:10,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67f496ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:35:10, skipping insertion in model container [2021-11-19 04:35:10,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:35:08" (2/3) ... [2021-11-19 04:35:10,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67f496ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:35:10, skipping insertion in model container [2021-11-19 04:35:10,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:35:10" (3/3) ... [2021-11-19 04:35:10,364 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product32.cil.c [2021-11-19 04:35:10,373 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:35:10,374 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 04:35:10,438 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:35:10,445 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 [2021-11-19 04:35:10,445 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 04:35:10,481 INFO L276 IsEmpty]: Start isEmpty. Operand has 629 states, 483 states have (on average 1.660455486542443) internal successors, (802), 503 states have internal predecessors, (802), 115 states have call successors, (115), 29 states have call predecessors, (115), 29 states have return successors, (115), 111 states have call predecessors, (115), 115 states have call successors, (115) [2021-11-19 04:35:10,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-19 04:35:10,494 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:10,495 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 04:35:10,495 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:10,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:10,503 INFO L85 PathProgramCache]: Analyzing trace with hash -699488972, now seen corresponding path program 1 times [2021-11-19 04:35:10,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:10,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136778868] [2021-11-19 04:35:10,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:10,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:10,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:11,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:35:11,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:11,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:35:11,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:11,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:35:11,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:11,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:35:11,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:11,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:35:11,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:11,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-19 04:35:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:11,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-19 04:35:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:11,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-19 04:35:11,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:11,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 04:35:11,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:11,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136778868] [2021-11-19 04:35:11,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136778868] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:11,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:11,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 04:35:11,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429113777] [2021-11-19 04:35:11,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:11,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:35:11,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:11,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:35:11,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:35:11,641 INFO L87 Difference]: Start difference. First operand has 629 states, 483 states have (on average 1.660455486542443) internal successors, (802), 503 states have internal predecessors, (802), 115 states have call successors, (115), 29 states have call predecessors, (115), 29 states have return successors, (115), 111 states have call predecessors, (115), 115 states have call successors, (115) Second operand has 9 states, 8 states have (on average 5.875) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 04:35:19,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:19,575 INFO L93 Difference]: Finished difference Result 1539 states and 2625 transitions. [2021-11-19 04:35:19,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:35:19,578 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.875) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 67 [2021-11-19 04:35:19,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:19,624 INFO L225 Difference]: With dead ends: 1539 [2021-11-19 04:35:19,624 INFO L226 Difference]: Without dead ends: 914 [2021-11-19 04:35:19,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:35:19,645 INFO L933 BasicCegarLoop]: 926 mSDtfsCounter, 1616 mSDsluCounter, 2468 mSDsCounter, 0 mSdLazyCounter, 4817 mSolverCounterSat, 484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1732 SdHoareTripleChecker+Valid, 3394 SdHoareTripleChecker+Invalid, 5301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 4817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:19,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1732 Valid, 3394 Invalid, 5301 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [484 Valid, 4817 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2021-11-19 04:35:19,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2021-11-19 04:35:19,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 632. [2021-11-19 04:35:19,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 486 states have (on average 1.6522633744855968) internal successors, (803), 506 states have internal predecessors, (803), 116 states have call successors, (116), 29 states have call predecessors, (116), 29 states have return successors, (115), 110 states have call predecessors, (115), 113 states have call successors, (115) [2021-11-19 04:35:19,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 1034 transitions. [2021-11-19 04:35:19,875 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 1034 transitions. Word has length 67 [2021-11-19 04:35:19,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:19,876 INFO L470 AbstractCegarLoop]: Abstraction has 632 states and 1034 transitions. [2021-11-19 04:35:19,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.875) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 04:35:19,876 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 1034 transitions. [2021-11-19 04:35:19,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-19 04:35:19,882 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:19,882 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 04:35:19,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 04:35:19,883 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:19,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:19,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1307471742, now seen corresponding path program 1 times [2021-11-19 04:35:19,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:19,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621909784] [2021-11-19 04:35:19,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:19,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:19,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:20,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:35:20,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:20,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:35:20,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:20,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:35:20,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:20,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:35:20,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:20,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 04:35:20,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:20,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-19 04:35:20,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:20,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-19 04:35:20,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:20,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-19 04:35:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:20,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 04:35:20,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:20,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621909784] [2021-11-19 04:35:20,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621909784] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:20,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:20,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 04:35:20,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353628386] [2021-11-19 04:35:20,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:20,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:35:20,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:20,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:35:20,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:35:20,272 INFO L87 Difference]: Start difference. First operand 632 states and 1034 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 04:35:26,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:26,214 INFO L93 Difference]: Finished difference Result 1524 states and 2572 transitions. [2021-11-19 04:35:26,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:35:26,215 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 68 [2021-11-19 04:35:26,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:26,225 INFO L225 Difference]: With dead ends: 1524 [2021-11-19 04:35:26,226 INFO L226 Difference]: Without dead ends: 877 [2021-11-19 04:35:26,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:35:26,232 INFO L933 BasicCegarLoop]: 900 mSDtfsCounter, 1508 mSDsluCounter, 1068 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 473 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1623 SdHoareTripleChecker+Valid, 1968 SdHoareTripleChecker+Invalid, 2810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 473 IncrementalHoareTripleChecker+Valid, 2337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:26,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1623 Valid, 1968 Invalid, 2810 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [473 Valid, 2337 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-11-19 04:35:26,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2021-11-19 04:35:26,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 608. [2021-11-19 04:35:26,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 465 states have (on average 1.643010752688172) internal successors, (764), 483 states have internal predecessors, (764), 115 states have call successors, (115), 29 states have call predecessors, (115), 27 states have return successors, (112), 109 states have call predecessors, (112), 112 states have call successors, (112) [2021-11-19 04:35:26,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 991 transitions. [2021-11-19 04:35:26,329 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 991 transitions. Word has length 68 [2021-11-19 04:35:26,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:26,330 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 991 transitions. [2021-11-19 04:35:26,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 04:35:26,330 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 991 transitions. [2021-11-19 04:35:26,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-19 04:35:26,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:26,333 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 04:35:26,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 04:35:26,334 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:26,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:26,335 INFO L85 PathProgramCache]: Analyzing trace with hash 235603084, now seen corresponding path program 1 times [2021-11-19 04:35:26,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:26,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986941358] [2021-11-19 04:35:26,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:26,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:26,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:26,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:35:26,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:26,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:35:26,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:26,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:35:26,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:26,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:35:26,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:26,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:35:26,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:26,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-19 04:35:26,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:26,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-19 04:35:26,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:26,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-19 04:35:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:26,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 04:35:26,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:26,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986941358] [2021-11-19 04:35:26,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986941358] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:26,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:26,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 04:35:26,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806907894] [2021-11-19 04:35:26,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:26,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:35:26,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:26,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:35:26,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:35:26,745 INFO L87 Difference]: Start difference. First operand 608 states and 991 transitions. Second operand has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 04:35:33,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:33,028 INFO L93 Difference]: Finished difference Result 1469 states and 2478 transitions. [2021-11-19 04:35:33,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:35:33,029 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 68 [2021-11-19 04:35:33,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:33,038 INFO L225 Difference]: With dead ends: 1469 [2021-11-19 04:35:33,038 INFO L226 Difference]: Without dead ends: 877 [2021-11-19 04:35:33,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:35:33,044 INFO L933 BasicCegarLoop]: 855 mSDtfsCounter, 899 mSDsluCounter, 2353 mSDsCounter, 0 mSdLazyCounter, 4832 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1014 SdHoareTripleChecker+Valid, 3208 SdHoareTripleChecker+Invalid, 5068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 4832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:33,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1014 Valid, 3208 Invalid, 5068 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [236 Valid, 4832 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-11-19 04:35:33,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2021-11-19 04:35:33,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 608. [2021-11-19 04:35:33,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 465 states have (on average 1.6408602150537634) internal successors, (763), 483 states have internal predecessors, (763), 115 states have call successors, (115), 29 states have call predecessors, (115), 27 states have return successors, (112), 109 states have call predecessors, (112), 112 states have call successors, (112) [2021-11-19 04:35:33,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 990 transitions. [2021-11-19 04:35:33,165 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 990 transitions. Word has length 68 [2021-11-19 04:35:33,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:33,167 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 990 transitions. [2021-11-19 04:35:33,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 04:35:33,168 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 990 transitions. [2021-11-19 04:35:33,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-19 04:35:33,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:33,170 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 04:35:33,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 04:35:33,171 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:33,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:33,171 INFO L85 PathProgramCache]: Analyzing trace with hash -728662656, now seen corresponding path program 1 times [2021-11-19 04:35:33,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:33,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098796867] [2021-11-19 04:35:33,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:33,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:33,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:33,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:35:33,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:33,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:35:33,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:33,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:35:33,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:33,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:35:33,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:33,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:35:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:33,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-19 04:35:33,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:33,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:35:33,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:33,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-19 04:35:33,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:33,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 04:35:33,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:33,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098796867] [2021-11-19 04:35:33,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098796867] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:33,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:33,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 04:35:33,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997030612] [2021-11-19 04:35:33,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:33,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:35:33,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:33,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:35:33,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:35:33,574 INFO L87 Difference]: Start difference. First operand 608 states and 990 transitions. Second operand has 9 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 04:35:39,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:39,707 INFO L93 Difference]: Finished difference Result 1487 states and 2500 transitions. [2021-11-19 04:35:39,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:35:39,708 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 69 [2021-11-19 04:35:39,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:39,716 INFO L225 Difference]: With dead ends: 1487 [2021-11-19 04:35:39,716 INFO L226 Difference]: Without dead ends: 871 [2021-11-19 04:35:39,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:35:39,722 INFO L933 BasicCegarLoop]: 886 mSDtfsCounter, 1545 mSDsluCounter, 2368 mSDsCounter, 0 mSdLazyCounter, 4680 mSolverCounterSat, 479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1660 SdHoareTripleChecker+Valid, 3254 SdHoareTripleChecker+Invalid, 5159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 4680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:39,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1660 Valid, 3254 Invalid, 5159 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [479 Valid, 4680 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-11-19 04:35:39,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-11-19 04:35:39,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 602. [2021-11-19 04:35:39,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 459 states have (on average 1.6339869281045751) internal successors, (750), 477 states have internal predecessors, (750), 115 states have call successors, (115), 29 states have call predecessors, (115), 27 states have return successors, (112), 109 states have call predecessors, (112), 112 states have call successors, (112) [2021-11-19 04:35:39,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 977 transitions. [2021-11-19 04:35:39,804 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 977 transitions. Word has length 69 [2021-11-19 04:35:39,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:39,805 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 977 transitions. [2021-11-19 04:35:39,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 04:35:39,805 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 977 transitions. [2021-11-19 04:35:39,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-19 04:35:39,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:39,807 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 04:35:39,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 04:35:39,808 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:39,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:39,808 INFO L85 PathProgramCache]: Analyzing trace with hash 418307892, now seen corresponding path program 1 times [2021-11-19 04:35:39,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:39,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311214813] [2021-11-19 04:35:39,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:39,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:39,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:39,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:35:39,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:40,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:35:40,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:40,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:35:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:40,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:35:40,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:40,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:35:40,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:40,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-19 04:35:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:40,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-19 04:35:40,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:40,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-19 04:35:40,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 04:35:40,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:40,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311214813] [2021-11-19 04:35:40,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311214813] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:40,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:40,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 04:35:40,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565279455] [2021-11-19 04:35:40,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:40,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:35:40,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:40,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:35:40,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:35:40,202 INFO L87 Difference]: Start difference. First operand 602 states and 977 transitions. Second operand has 9 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 04:35:46,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:46,390 INFO L93 Difference]: Finished difference Result 1457 states and 2449 transitions. [2021-11-19 04:35:46,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:35:46,390 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 70 [2021-11-19 04:35:46,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:46,399 INFO L225 Difference]: With dead ends: 1457 [2021-11-19 04:35:46,399 INFO L226 Difference]: Without dead ends: 871 [2021-11-19 04:35:46,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:35:46,408 INFO L933 BasicCegarLoop]: 855 mSDtfsCounter, 875 mSDsluCounter, 2412 mSDsCounter, 0 mSdLazyCounter, 4773 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 990 SdHoareTripleChecker+Valid, 3267 SdHoareTripleChecker+Invalid, 5003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 4773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:46,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [990 Valid, 3267 Invalid, 5003 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [230 Valid, 4773 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-11-19 04:35:46,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-11-19 04:35:46,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 602. [2021-11-19 04:35:46,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 459 states have (on average 1.6318082788671024) internal successors, (749), 477 states have internal predecessors, (749), 115 states have call successors, (115), 29 states have call predecessors, (115), 27 states have return successors, (112), 109 states have call predecessors, (112), 112 states have call successors, (112) [2021-11-19 04:35:46,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 976 transitions. [2021-11-19 04:35:46,496 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 976 transitions. Word has length 70 [2021-11-19 04:35:46,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:46,496 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 976 transitions. [2021-11-19 04:35:46,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 04:35:46,497 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 976 transitions. [2021-11-19 04:35:46,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-19 04:35:46,498 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:46,499 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 04:35:46,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 04:35:46,499 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:46,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:46,500 INFO L85 PathProgramCache]: Analyzing trace with hash 321768477, now seen corresponding path program 1 times [2021-11-19 04:35:46,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:46,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158358309] [2021-11-19 04:35:46,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:46,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:46,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:35:46,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:46,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:35:46,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:46,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:35:46,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:46,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:35:46,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:46,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:35:46,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:46,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 04:35:46,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:46,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-19 04:35:46,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:46,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-19 04:35:46,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:46,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 04:35:46,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:46,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158358309] [2021-11-19 04:35:46,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158358309] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:46,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:46,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 04:35:46,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880305470] [2021-11-19 04:35:46,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:46,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:35:46,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:46,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:35:46,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:35:46,917 INFO L87 Difference]: Start difference. First operand 602 states and 976 transitions. Second operand has 9 states, 8 states have (on average 6.375) internal successors, (51), 6 states have internal predecessors, (51), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 04:35:52,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:52,788 INFO L93 Difference]: Finished difference Result 1475 states and 2469 transitions. [2021-11-19 04:35:52,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:35:52,789 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.375) internal successors, (51), 6 states have internal predecessors, (51), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 71 [2021-11-19 04:35:52,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:52,796 INFO L225 Difference]: With dead ends: 1475 [2021-11-19 04:35:52,796 INFO L226 Difference]: Without dead ends: 865 [2021-11-19 04:35:52,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:35:52,801 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 1510 mSDsluCounter, 2378 mSDsCounter, 0 mSdLazyCounter, 4611 mSolverCounterSat, 479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1625 SdHoareTripleChecker+Valid, 3252 SdHoareTripleChecker+Invalid, 5090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 4611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:52,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1625 Valid, 3252 Invalid, 5090 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [479 Valid, 4611 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-11-19 04:35:52,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2021-11-19 04:35:52,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 596. [2021-11-19 04:35:52,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 453 states have (on average 1.6247240618101546) internal successors, (736), 471 states have internal predecessors, (736), 115 states have call successors, (115), 29 states have call predecessors, (115), 27 states have return successors, (112), 109 states have call predecessors, (112), 112 states have call successors, (112) [2021-11-19 04:35:52,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 963 transitions. [2021-11-19 04:35:52,882 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 963 transitions. Word has length 71 [2021-11-19 04:35:52,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:52,882 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 963 transitions. [2021-11-19 04:35:52,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.375) internal successors, (51), 6 states have internal predecessors, (51), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 04:35:52,882 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 963 transitions. [2021-11-19 04:35:52,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-19 04:35:52,884 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:52,884 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 04:35:52,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 04:35:52,884 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:52,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:52,885 INFO L85 PathProgramCache]: Analyzing trace with hash -219339787, now seen corresponding path program 1 times [2021-11-19 04:35:52,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:52,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481115267] [2021-11-19 04:35:52,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:52,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:52,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:53,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:35:53,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:53,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:35:53,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:53,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:35:53,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:53,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:35:53,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:53,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:35:53,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:53,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-19 04:35:53,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:53,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-19 04:35:53,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:53,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-19 04:35:53,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:53,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 04:35:53,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:53,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481115267] [2021-11-19 04:35:53,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481115267] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:53,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:53,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 04:35:53,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025666580] [2021-11-19 04:35:53,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:53,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:35:53,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:53,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:35:53,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:35:53,228 INFO L87 Difference]: Start difference. First operand 596 states and 963 transitions. Second operand has 9 states, 8 states have (on average 6.5) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 04:35:58,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:58,831 INFO L93 Difference]: Finished difference Result 1445 states and 2420 transitions. [2021-11-19 04:35:58,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:35:58,832 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 72 [2021-11-19 04:35:58,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:58,839 INFO L225 Difference]: With dead ends: 1445 [2021-11-19 04:35:58,839 INFO L226 Difference]: Without dead ends: 865 [2021-11-19 04:35:58,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:35:58,844 INFO L933 BasicCegarLoop]: 832 mSDtfsCounter, 1465 mSDsluCounter, 2305 mSDsCounter, 0 mSdLazyCounter, 4544 mSolverCounterSat, 475 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1580 SdHoareTripleChecker+Valid, 3137 SdHoareTripleChecker+Invalid, 5019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 475 IncrementalHoareTripleChecker+Valid, 4544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:58,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1580 Valid, 3137 Invalid, 5019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [475 Valid, 4544 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-11-19 04:35:58,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2021-11-19 04:35:58,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 596. [2021-11-19 04:35:58,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 453 states have (on average 1.6225165562913908) internal successors, (735), 471 states have internal predecessors, (735), 115 states have call successors, (115), 29 states have call predecessors, (115), 27 states have return successors, (112), 109 states have call predecessors, (112), 112 states have call successors, (112) [2021-11-19 04:35:58,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 962 transitions. [2021-11-19 04:35:58,931 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 962 transitions. Word has length 72 [2021-11-19 04:35:58,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:58,931 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 962 transitions. [2021-11-19 04:35:58,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 04:35:58,932 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 962 transitions. [2021-11-19 04:35:58,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-19 04:35:58,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:58,933 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 04:35:58,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 04:35:58,934 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:58,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:58,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1711076289, now seen corresponding path program 1 times [2021-11-19 04:35:58,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:58,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562945819] [2021-11-19 04:35:58,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:58,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:59,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:35:59,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:59,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:35:59,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:59,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:35:59,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:59,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:35:59,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:59,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:35:59,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:59,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-19 04:35:59,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:59,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-19 04:35:59,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:59,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 04:35:59,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:35:59,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 04:35:59,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:59,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562945819] [2021-11-19 04:35:59,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562945819] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:35:59,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:35:59,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 04:35:59,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742075571] [2021-11-19 04:35:59,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:35:59,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:35:59,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:59,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:35:59,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:35:59,313 INFO L87 Difference]: Start difference. First operand 596 states and 962 transitions. Second operand has 9 states, 8 states have (on average 6.625) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 04:36:05,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:36:05,699 INFO L93 Difference]: Finished difference Result 1463 states and 2438 transitions. [2021-11-19 04:36:05,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:36:05,699 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.625) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 73 [2021-11-19 04:36:05,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:36:05,705 INFO L225 Difference]: With dead ends: 1463 [2021-11-19 04:36:05,706 INFO L226 Difference]: Without dead ends: 859 [2021-11-19 04:36:05,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:36:05,709 INFO L933 BasicCegarLoop]: 851 mSDtfsCounter, 878 mSDsluCounter, 2382 mSDsCounter, 0 mSdLazyCounter, 4698 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 993 SdHoareTripleChecker+Valid, 3233 SdHoareTripleChecker+Invalid, 4929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 4698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:36:05,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [993 Valid, 3233 Invalid, 4929 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [231 Valid, 4698 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-11-19 04:36:05,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2021-11-19 04:36:05,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 590. [2021-11-19 04:36:05,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 447 states have (on average 1.6152125279642058) internal successors, (722), 465 states have internal predecessors, (722), 115 states have call successors, (115), 29 states have call predecessors, (115), 27 states have return successors, (112), 109 states have call predecessors, (112), 112 states have call successors, (112) [2021-11-19 04:36:05,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 949 transitions. [2021-11-19 04:36:05,796 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 949 transitions. Word has length 73 [2021-11-19 04:36:05,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:36:05,796 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 949 transitions. [2021-11-19 04:36:05,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.625) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 04:36:05,796 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 949 transitions. [2021-11-19 04:36:05,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-19 04:36:05,798 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:36:05,798 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 04:36:05,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 04:36:05,798 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:36:05,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:36:05,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1784074016, now seen corresponding path program 1 times [2021-11-19 04:36:05,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:36:05,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926306205] [2021-11-19 04:36:05,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:36:05,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:36:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:05,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:36:05,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:06,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:36:06,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:06,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:36:06,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:06,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:36:06,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:06,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:36:06,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:06,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-19 04:36:06,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:06,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-19 04:36:06,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:06,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 04:36:06,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:06,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 04:36:06,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:36:06,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926306205] [2021-11-19 04:36:06,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926306205] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:36:06,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:36:06,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 04:36:06,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511273737] [2021-11-19 04:36:06,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:36:06,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:36:06,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:36:06,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:36:06,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:36:06,161 INFO L87 Difference]: Start difference. First operand 590 states and 949 transitions. Second operand has 9 states, 8 states have (on average 6.625) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 04:36:12,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:36:12,309 INFO L93 Difference]: Finished difference Result 1433 states and 2391 transitions. [2021-11-19 04:36:12,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:36:12,310 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.625) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 73 [2021-11-19 04:36:12,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:36:12,318 INFO L225 Difference]: With dead ends: 1433 [2021-11-19 04:36:12,318 INFO L226 Difference]: Without dead ends: 859 [2021-11-19 04:36:12,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:36:12,323 INFO L933 BasicCegarLoop]: 833 mSDtfsCounter, 836 mSDsluCounter, 2412 mSDsCounter, 0 mSdLazyCounter, 4589 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 3245 SdHoareTripleChecker+Invalid, 4821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 4589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:36:12,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [951 Valid, 3245 Invalid, 4821 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [232 Valid, 4589 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-11-19 04:36:12,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2021-11-19 04:36:12,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 590. [2021-11-19 04:36:12,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 447 states have (on average 1.6129753914988814) internal successors, (721), 465 states have internal predecessors, (721), 115 states have call successors, (115), 29 states have call predecessors, (115), 27 states have return successors, (112), 109 states have call predecessors, (112), 112 states have call successors, (112) [2021-11-19 04:36:12,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 948 transitions. [2021-11-19 04:36:12,414 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 948 transitions. Word has length 73 [2021-11-19 04:36:12,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:36:12,414 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 948 transitions. [2021-11-19 04:36:12,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.625) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 04:36:12,415 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 948 transitions. [2021-11-19 04:36:12,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-19 04:36:12,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:36:12,417 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 04:36:12,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 04:36:12,417 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:36:12,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:36:12,418 INFO L85 PathProgramCache]: Analyzing trace with hash 130504827, now seen corresponding path program 1 times [2021-11-19 04:36:12,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:36:12,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528582814] [2021-11-19 04:36:12,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:36:12,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:36:12,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:12,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:36:12,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:12,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:36:12,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:12,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:36:12,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:12,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:36:12,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:12,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:36:12,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:12,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:36:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:12,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-19 04:36:12,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:12,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-19 04:36:12,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:12,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 04:36:12,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:36:12,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528582814] [2021-11-19 04:36:12,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528582814] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:36:12,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:36:12,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 04:36:12,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543710327] [2021-11-19 04:36:12,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:36:12,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:36:12,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:36:12,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:36:12,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:36:12,796 INFO L87 Difference]: Start difference. First operand 590 states and 948 transitions. Second operand has 9 states, 8 states have (on average 6.75) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 04:36:18,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:36:18,741 INFO L93 Difference]: Finished difference Result 1445 states and 2401 transitions. [2021-11-19 04:36:18,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:36:18,742 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 74 [2021-11-19 04:36:18,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:36:18,747 INFO L225 Difference]: With dead ends: 1445 [2021-11-19 04:36:18,747 INFO L226 Difference]: Without dead ends: 871 [2021-11-19 04:36:18,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:36:18,750 INFO L933 BasicCegarLoop]: 832 mSDtfsCounter, 1429 mSDsluCounter, 2368 mSDsCounter, 0 mSdLazyCounter, 4475 mSolverCounterSat, 479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1544 SdHoareTripleChecker+Valid, 3200 SdHoareTripleChecker+Invalid, 4954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 4475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-19 04:36:18,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1544 Valid, 3200 Invalid, 4954 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [479 Valid, 4475 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-11-19 04:36:18,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-11-19 04:36:18,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 596. [2021-11-19 04:36:18,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 453 states have (on average 1.6048565121412803) internal successors, (727), 471 states have internal predecessors, (727), 115 states have call successors, (115), 29 states have call predecessors, (115), 27 states have return successors, (112), 109 states have call predecessors, (112), 112 states have call successors, (112) [2021-11-19 04:36:18,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 954 transitions. [2021-11-19 04:36:18,834 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 954 transitions. Word has length 74 [2021-11-19 04:36:18,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:36:18,835 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 954 transitions. [2021-11-19 04:36:18,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 04:36:18,835 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 954 transitions. [2021-11-19 04:36:18,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-19 04:36:18,836 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:36:18,837 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 04:36:18,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 04:36:18,837 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:36:18,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:36:18,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1714862339, now seen corresponding path program 1 times [2021-11-19 04:36:18,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:36:18,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601764809] [2021-11-19 04:36:18,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:36:18,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:36:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:19,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:36:19,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:19,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:36:19,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:19,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:36:19,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:19,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:36:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:19,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:36:19,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:19,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:36:19,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:19,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-19 04:36:19,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:19,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-19 04:36:19,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:19,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 04:36:19,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:36:19,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601764809] [2021-11-19 04:36:19,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601764809] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:36:19,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:36:19,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 04:36:19,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209692040] [2021-11-19 04:36:19,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:36:19,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:36:19,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:36:19,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:36:19,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:36:19,185 INFO L87 Difference]: Start difference. First operand 596 states and 954 transitions. Second operand has 9 states, 8 states have (on average 6.75) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 04:36:25,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:36:25,520 INFO L93 Difference]: Finished difference Result 1448 states and 2402 transitions. [2021-11-19 04:36:25,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 04:36:25,521 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 74 [2021-11-19 04:36:25,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:36:25,527 INFO L225 Difference]: With dead ends: 1448 [2021-11-19 04:36:25,527 INFO L226 Difference]: Without dead ends: 859 [2021-11-19 04:36:25,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:36:25,531 INFO L933 BasicCegarLoop]: 830 mSDtfsCounter, 840 mSDsluCounter, 2401 mSDsCounter, 0 mSdLazyCounter, 4594 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 955 SdHoareTripleChecker+Valid, 3231 SdHoareTripleChecker+Invalid, 4825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 4594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:36:25,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [955 Valid, 3231 Invalid, 4825 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [231 Valid, 4594 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-11-19 04:36:25,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2021-11-19 04:36:25,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 590. [2021-11-19 04:36:25,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 447 states have (on average 1.610738255033557) internal successors, (720), 465 states have internal predecessors, (720), 115 states have call successors, (115), 29 states have call predecessors, (115), 27 states have return successors, (112), 109 states have call predecessors, (112), 112 states have call successors, (112) [2021-11-19 04:36:25,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 947 transitions. [2021-11-19 04:36:25,658 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 947 transitions. Word has length 74 [2021-11-19 04:36:25,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:36:25,659 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 947 transitions. [2021-11-19 04:36:25,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 04:36:25,659 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 947 transitions. [2021-11-19 04:36:25,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-19 04:36:25,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:36:25,662 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 04:36:25,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-19 04:36:25,662 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:36:25,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:36:25,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1135164154, now seen corresponding path program 1 times [2021-11-19 04:36:25,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:36:25,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088042763] [2021-11-19 04:36:25,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:36:25,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:36:25,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:25,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:36:25,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:25,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:36:25,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:26,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:36:26,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:26,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:36:26,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:26,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:36:26,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:26,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-19 04:36:26,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:26,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:36:26,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:26,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-19 04:36:26,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:26,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:36:26,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:36:26,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088042763] [2021-11-19 04:36:26,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088042763] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:36:26,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858998958] [2021-11-19 04:36:26,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:36:26,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:36:26,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd7c603-ed95-464e-b7b2-6f030292d935/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:36:26,060 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd7c603-ed95-464e-b7b2-6f030292d935/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:36:26,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd7c603-ed95-464e-b7b2-6f030292d935/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 04:36:26,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:26,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 04:36:26,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:36:26,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:36:26,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:36:26,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858998958] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:36:26,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:36:26,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2021-11-19 04:36:26,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129239454] [2021-11-19 04:36:26,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:36:26,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:36:26,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:36:26,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:36:26,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:36:26,580 INFO L87 Difference]: Start difference. First operand 590 states and 947 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 04:36:26,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:36:26,787 INFO L93 Difference]: Finished difference Result 1681 states and 2729 transitions. [2021-11-19 04:36:26,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:36:26,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 75 [2021-11-19 04:36:26,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:36:26,797 INFO L225 Difference]: With dead ends: 1681 [2021-11-19 04:36:26,797 INFO L226 Difference]: Without dead ends: 1109 [2021-11-19 04:36:26,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:36:26,801 INFO L933 BasicCegarLoop]: 1627 mSDtfsCounter, 911 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 911 SdHoareTripleChecker+Valid, 2470 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:36:26,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [911 Valid, 2470 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:36:26,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-11-19 04:36:26,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 1094. [2021-11-19 04:36:26,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 836 states have (on average 1.6220095693779903) internal successors, (1356), 871 states have internal predecessors, (1356), 205 states have call successors, (205), 53 states have call predecessors, (205), 52 states have return successors, (207), 197 states have call predecessors, (207), 202 states have call successors, (207) [2021-11-19 04:36:26,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1768 transitions. [2021-11-19 04:36:26,949 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1768 transitions. Word has length 75 [2021-11-19 04:36:26,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:36:26,950 INFO L470 AbstractCegarLoop]: Abstraction has 1094 states and 1768 transitions. [2021-11-19 04:36:26,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 04:36:26,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1768 transitions. [2021-11-19 04:36:26,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-19 04:36:26,952 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:36:26,952 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 04:36:26,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd7c603-ed95-464e-b7b2-6f030292d935/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-19 04:36:27,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd7c603-ed95-464e-b7b2-6f030292d935/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:36:27,168 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:36:27,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:36:27,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1148699841, now seen corresponding path program 1 times [2021-11-19 04:36:27,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:36:27,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56470687] [2021-11-19 04:36:27,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:36:27,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:36:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:27,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:36:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:27,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:36:27,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:27,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:36:27,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:27,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:36:27,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:27,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:36:27,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:27,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-19 04:36:27,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:27,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:36:27,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:27,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-19 04:36:27,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:27,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:36:27,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:36:27,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56470687] [2021-11-19 04:36:27,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56470687] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:36:27,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344283809] [2021-11-19 04:36:27,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:36:27,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:36:27,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd7c603-ed95-464e-b7b2-6f030292d935/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:36:27,574 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd7c603-ed95-464e-b7b2-6f030292d935/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:36:27,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd7c603-ed95-464e-b7b2-6f030292d935/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 04:36:27,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:27,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 1500 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 04:36:27,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:36:28,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:36:28,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:36:28,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344283809] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:36:28,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:36:28,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2021-11-19 04:36:28,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227210383] [2021-11-19 04:36:28,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:36:28,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:36:28,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:36:28,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:36:28,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:36:28,149 INFO L87 Difference]: Start difference. First operand 1094 states and 1768 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 04:36:28,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:36:28,433 INFO L93 Difference]: Finished difference Result 2689 states and 4373 transitions. [2021-11-19 04:36:28,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:36:28,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 76 [2021-11-19 04:36:28,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:36:28,448 INFO L225 Difference]: With dead ends: 2689 [2021-11-19 04:36:28,449 INFO L226 Difference]: Without dead ends: 1613 [2021-11-19 04:36:28,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:36:28,457 INFO L933 BasicCegarLoop]: 1682 mSDtfsCounter, 910 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 2525 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:36:28,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [910 Valid, 2525 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:36:28,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2021-11-19 04:36:28,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 1565. [2021-11-19 04:36:28,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1565 states, 1198 states have (on average 1.6327212020033388) internal successors, (1956), 1250 states have internal predecessors, (1956), 292 states have call successors, (292), 74 states have call predecessors, (292), 74 states have return successors, (299), 282 states have call predecessors, (299), 289 states have call successors, (299) [2021-11-19 04:36:28,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 2547 transitions. [2021-11-19 04:36:28,722 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 2547 transitions. Word has length 76 [2021-11-19 04:36:28,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:36:28,722 INFO L470 AbstractCegarLoop]: Abstraction has 1565 states and 2547 transitions. [2021-11-19 04:36:28,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 04:36:28,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 2547 transitions. [2021-11-19 04:36:28,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-19 04:36:28,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:36:28,724 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 04:36:28,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd7c603-ed95-464e-b7b2-6f030292d935/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 04:36:28,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd7c603-ed95-464e-b7b2-6f030292d935/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:36:28,938 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:36:28,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:36:28,939 INFO L85 PathProgramCache]: Analyzing trace with hash 522716143, now seen corresponding path program 1 times [2021-11-19 04:36:28,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:36:28,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153606944] [2021-11-19 04:36:28,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:36:28,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:36:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:29,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:36:29,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:29,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:36:29,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:29,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:36:29,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:29,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:36:29,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:29,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:36:29,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:29,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-19 04:36:29,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:29,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:36:29,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:29,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 04:36:29,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:29,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-19 04:36:29,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:29,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 04:36:29,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:36:29,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153606944] [2021-11-19 04:36:29,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153606944] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:36:29,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:36:29,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:36:29,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209918296] [2021-11-19 04:36:29,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:36:29,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:36:29,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:36:29,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:36:29,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:36:29,390 INFO L87 Difference]: Start difference. First operand 1565 states and 2547 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 04:36:41,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:36:41,569 INFO L93 Difference]: Finished difference Result 6159 states and 10861 transitions. [2021-11-19 04:36:41,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 04:36:41,570 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 78 [2021-11-19 04:36:41,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:36:41,626 INFO L225 Difference]: With dead ends: 6159 [2021-11-19 04:36:41,626 INFO L226 Difference]: Without dead ends: 4612 [2021-11-19 04:36:41,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-11-19 04:36:41,637 INFO L933 BasicCegarLoop]: 1061 mSDtfsCounter, 3691 mSDsluCounter, 2300 mSDsCounter, 0 mSdLazyCounter, 5627 mSolverCounterSat, 1331 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3841 SdHoareTripleChecker+Valid, 3361 SdHoareTripleChecker+Invalid, 6958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1331 IncrementalHoareTripleChecker+Valid, 5627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:36:41,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3841 Valid, 3361 Invalid, 6958 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1331 Valid, 5627 Invalid, 0 Unknown, 0 Unchecked, 10.4s Time] [2021-11-19 04:36:41,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4612 states. [2021-11-19 04:36:42,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4612 to 3733. [2021-11-19 04:36:42,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3733 states, 2715 states have (on average 1.6044198895027624) internal successors, (4356), 2911 states have internal predecessors, (4356), 831 states have call successors, (831), 142 states have call predecessors, (831), 186 states have return successors, (1325), 829 states have call predecessors, (1325), 827 states have call successors, (1325) [2021-11-19 04:36:42,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3733 states to 3733 states and 6512 transitions. [2021-11-19 04:36:42,466 INFO L78 Accepts]: Start accepts. Automaton has 3733 states and 6512 transitions. Word has length 78 [2021-11-19 04:36:42,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:36:42,466 INFO L470 AbstractCegarLoop]: Abstraction has 3733 states and 6512 transitions. [2021-11-19 04:36:42,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 04:36:42,467 INFO L276 IsEmpty]: Start isEmpty. Operand 3733 states and 6512 transitions. [2021-11-19 04:36:42,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-19 04:36:42,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:36:42,470 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 04:36:42,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-19 04:36:42,470 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:36:42,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:36:42,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1840391052, now seen corresponding path program 1 times [2021-11-19 04:36:42,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:36:42,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959902118] [2021-11-19 04:36:42,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:36:42,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:36:42,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:42,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:36:42,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:42,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:36:42,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:42,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:36:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:42,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:36:42,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:42,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:36:42,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:42,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-19 04:36:42,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:42,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:36:42,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:42,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 04:36:42,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:42,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 04:36:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:42,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:36:42,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:36:42,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959902118] [2021-11-19 04:36:42,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959902118] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:36:42,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054121432] [2021-11-19 04:36:42,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:36:42,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:36:42,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd7c603-ed95-464e-b7b2-6f030292d935/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:36:42,828 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd7c603-ed95-464e-b7b2-6f030292d935/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:36:42,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd7c603-ed95-464e-b7b2-6f030292d935/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 04:36:43,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:43,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 1518 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 04:36:43,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:36:43,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:36:43,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:36:43,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054121432] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:36:43,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:36:43,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2021-11-19 04:36:43,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493032020] [2021-11-19 04:36:43,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:36:43,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:36:43,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:36:43,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:36:43,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:36:43,405 INFO L87 Difference]: Start difference. First operand 3733 states and 6512 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 5 states have internal predecessors, (59), 4 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-19 04:36:45,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:36:45,149 INFO L93 Difference]: Finished difference Result 10208 states and 18118 transitions. [2021-11-19 04:36:45,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:36:45,150 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 5 states have internal predecessors, (59), 4 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 79 [2021-11-19 04:36:45,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:36:45,226 INFO L225 Difference]: With dead ends: 10208 [2021-11-19 04:36:45,226 INFO L226 Difference]: Without dead ends: 6493 [2021-11-19 04:36:45,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:36:45,266 INFO L933 BasicCegarLoop]: 1024 mSDtfsCounter, 850 mSDsluCounter, 3673 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 4697 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:36:45,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [859 Valid, 4697 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 04:36:45,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6493 states. [2021-11-19 04:36:46,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6493 to 6424. [2021-11-19 04:36:46,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6424 states, 4674 states have (on average 1.5614035087719298) internal successors, (7298), 5008 states have internal predecessors, (7298), 1408 states have call successors, (1408), 256 states have call predecessors, (1408), 341 states have return successors, (2441), 1409 states have call predecessors, (2441), 1402 states have call successors, (2441) [2021-11-19 04:36:46,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6424 states to 6424 states and 11147 transitions. [2021-11-19 04:36:46,377 INFO L78 Accepts]: Start accepts. Automaton has 6424 states and 11147 transitions. Word has length 79 [2021-11-19 04:36:46,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:36:46,378 INFO L470 AbstractCegarLoop]: Abstraction has 6424 states and 11147 transitions. [2021-11-19 04:36:46,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 5 states have internal predecessors, (59), 4 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-19 04:36:46,378 INFO L276 IsEmpty]: Start isEmpty. Operand 6424 states and 11147 transitions. [2021-11-19 04:36:46,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-19 04:36:46,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:36:46,380 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 04:36:46,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd7c603-ed95-464e-b7b2-6f030292d935/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-19 04:36:46,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4dd7c603-ed95-464e-b7b2-6f030292d935/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-19 04:36:46,608 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:36:46,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:36:46,608 INFO L85 PathProgramCache]: Analyzing trace with hash 622724818, now seen corresponding path program 1 times [2021-11-19 04:36:46,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:36:46,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925318534] [2021-11-19 04:36:46,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:36:46,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:36:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:46,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:36:46,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:46,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:36:46,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:46,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:36:46,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:46,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:36:46,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:46,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:36:46,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:46,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-19 04:36:46,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:46,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:36:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:46,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 04:36:46,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:46,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 04:36:46,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:46,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 04:36:46,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:36:46,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925318534] [2021-11-19 04:36:46,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925318534] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:36:46,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:36:46,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 04:36:46,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275670060] [2021-11-19 04:36:46,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:36:46,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:36:46,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:36:46,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:36:46,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:36:46,919 INFO L87 Difference]: Start difference. First operand 6424 states and 11147 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 04:36:53,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:36:53,109 INFO L93 Difference]: Finished difference Result 14086 states and 25086 transitions. [2021-11-19 04:36:53,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:36:53,110 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 79 [2021-11-19 04:36:53,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:36:53,174 INFO L225 Difference]: With dead ends: 14086 [2021-11-19 04:36:53,174 INFO L226 Difference]: Without dead ends: 7680 [2021-11-19 04:36:53,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:36:53,203 INFO L933 BasicCegarLoop]: 908 mSDtfsCounter, 819 mSDsluCounter, 1228 mSDsCounter, 0 mSdLazyCounter, 2335 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 2136 SdHoareTripleChecker+Invalid, 2552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 2335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:36:53,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [934 Valid, 2136 Invalid, 2552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 2335 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-11-19 04:36:53,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7680 states. [2021-11-19 04:36:54,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7680 to 6894. [2021-11-19 04:36:54,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6894 states, 4896 states have (on average 1.5526960784313726) internal successors, (7602), 5270 states have internal predecessors, (7602), 1642 states have call successors, (1642), 260 states have call predecessors, (1642), 355 states have return successors, (2916), 1653 states have call predecessors, (2916), 1636 states have call successors, (2916) [2021-11-19 04:36:54,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6894 states to 6894 states and 12160 transitions. [2021-11-19 04:36:54,488 INFO L78 Accepts]: Start accepts. Automaton has 6894 states and 12160 transitions. Word has length 79 [2021-11-19 04:36:54,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:36:54,489 INFO L470 AbstractCegarLoop]: Abstraction has 6894 states and 12160 transitions. [2021-11-19 04:36:54,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 04:36:54,490 INFO L276 IsEmpty]: Start isEmpty. Operand 6894 states and 12160 transitions. [2021-11-19 04:36:54,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-19 04:36:54,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:36:54,492 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 04:36:54,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-19 04:36:54,493 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:36:54,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:36:54,493 INFO L85 PathProgramCache]: Analyzing trace with hash -2093024403, now seen corresponding path program 1 times [2021-11-19 04:36:54,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:36:54,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056851741] [2021-11-19 04:36:54,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:36:54,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:36:54,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:54,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:36:54,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:54,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:36:54,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:54,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:36:54,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:54,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:36:54,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:54,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:36:54,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:54,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-19 04:36:54,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:54,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:36:54,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:54,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 04:36:54,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:54,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 04:36:54,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:54,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-19 04:36:54,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:54,852 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 04:36:54,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:36:54,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056851741] [2021-11-19 04:36:54,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056851741] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:36:54,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:36:54,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:36:54,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758057845] [2021-11-19 04:36:54,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:36:54,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:36:54,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:36:54,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:36:54,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:36:54,855 INFO L87 Difference]: Start difference. First operand 6894 states and 12160 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 04:37:09,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:37:09,165 INFO L93 Difference]: Finished difference Result 22954 states and 44256 transitions. [2021-11-19 04:37:09,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 04:37:09,166 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 87 [2021-11-19 04:37:09,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:37:09,327 INFO L225 Difference]: With dead ends: 22954 [2021-11-19 04:37:09,328 INFO L226 Difference]: Without dead ends: 16078 [2021-11-19 04:37:09,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-11-19 04:37:09,385 INFO L933 BasicCegarLoop]: 1011 mSDtfsCounter, 2553 mSDsluCounter, 2271 mSDsCounter, 0 mSdLazyCounter, 5813 mSolverCounterSat, 892 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2701 SdHoareTripleChecker+Valid, 3282 SdHoareTripleChecker+Invalid, 6705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 892 IncrementalHoareTripleChecker+Valid, 5813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:37:09,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2701 Valid, 3282 Invalid, 6705 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [892 Valid, 5813 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time] [2021-11-19 04:37:09,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16078 states. [2021-11-19 04:37:11,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16078 to 13670. [2021-11-19 04:37:11,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13670 states, 9704 states have (on average 1.5491549876339654) internal successors, (15033), 10446 states have internal predecessors, (15033), 3256 states have call successors, (3256), 514 states have call predecessors, (3256), 709 states have return successors, (6750), 3289 states have call predecessors, (6750), 3246 states have call successors, (6750) [2021-11-19 04:37:12,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13670 states to 13670 states and 25039 transitions. [2021-11-19 04:37:12,196 INFO L78 Accepts]: Start accepts. Automaton has 13670 states and 25039 transitions. Word has length 87 [2021-11-19 04:37:12,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:37:12,197 INFO L470 AbstractCegarLoop]: Abstraction has 13670 states and 25039 transitions. [2021-11-19 04:37:12,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 04:37:12,198 INFO L276 IsEmpty]: Start isEmpty. Operand 13670 states and 25039 transitions. [2021-11-19 04:37:12,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-19 04:37:12,200 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:37:12,200 INFO L514 BasicCegarLoop]: trace histogram [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, 1] [2021-11-19 04:37:12,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-19 04:37:12,201 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:37:12,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:37:12,201 INFO L85 PathProgramCache]: Analyzing trace with hash 326445404, now seen corresponding path program 1 times [2021-11-19 04:37:12,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:37:12,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246677947] [2021-11-19 04:37:12,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:37:12,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:37:12,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:37:12,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:37:12,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:37:12,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:37:12,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:37:12,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:37:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:37:12,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:37:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:37:12,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:37:12,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:37:12,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-19 04:37:12,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:37:12,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:37:12,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:37:12,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 04:37:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:37:12,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 04:37:12,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:37:12,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-19 04:37:12,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:37:12,523 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:37:12,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:37:12,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246677947] [2021-11-19 04:37:12,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246677947] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:37:12,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:37:12,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 04:37:12,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134401943] [2021-11-19 04:37:12,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:37:12,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:37:12,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:37:12,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:37:12,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:37:12,526 INFO L87 Difference]: Start difference. First operand 13670 states and 25039 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 04:37:19,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:37:19,676 INFO L93 Difference]: Finished difference Result 28802 states and 54299 transitions. [2021-11-19 04:37:19,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:37:19,676 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 88 [2021-11-19 04:37:19,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:37:19,804 INFO L225 Difference]: With dead ends: 28802 [2021-11-19 04:37:19,805 INFO L226 Difference]: Without dead ends: 15150 [2021-11-19 04:37:19,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:37:19,913 INFO L933 BasicCegarLoop]: 906 mSDtfsCounter, 1398 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 2193 mSolverCounterSat, 435 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1515 SdHoareTripleChecker+Valid, 2086 SdHoareTripleChecker+Invalid, 2628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 435 IncrementalHoareTripleChecker+Valid, 2193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:37:19,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1515 Valid, 2086 Invalid, 2628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [435 Valid, 2193 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-11-19 04:37:19,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15150 states. [2021-11-19 04:37:22,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15150 to 13710. [2021-11-19 04:37:22,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13710 states, 9740 states have (on average 1.547535934291581) internal successors, (15073), 10474 states have internal predecessors, (15073), 3256 states have call successors, (3256), 530 states have call predecessors, (3256), 713 states have return successors, (6734), 3285 states have call predecessors, (6734), 3246 states have call successors, (6734) [2021-11-19 04:37:22,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13710 states to 13710 states and 25063 transitions. [2021-11-19 04:37:22,772 INFO L78 Accepts]: Start accepts. Automaton has 13710 states and 25063 transitions. Word has length 88 [2021-11-19 04:37:22,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:37:22,773 INFO L470 AbstractCegarLoop]: Abstraction has 13710 states and 25063 transitions. [2021-11-19 04:37:22,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 04:37:22,773 INFO L276 IsEmpty]: Start isEmpty. Operand 13710 states and 25063 transitions. [2021-11-19 04:37:22,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-19 04:37:22,775 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:37:22,776 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:37:22,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-19 04:37:22,776 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:37:22,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:37:22,777 INFO L85 PathProgramCache]: Analyzing trace with hash 47844304, now seen corresponding path program 1 times [2021-11-19 04:37:22,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:37:22,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441004519] [2021-11-19 04:37:22,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:37:22,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:37:22,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:37:22,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:37:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:37:23,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:37:23,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:37:23,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:37:23,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:37:23,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:37:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:37:23,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:37:23,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:37:23,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-19 04:37:23,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:37:23,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:37:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:37:23,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 04:37:23,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:37:23,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 04:37:23,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:37:23,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-19 04:37:23,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:37:23,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-19 04:37:23,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:37:23,127 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:37:23,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:37:23,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441004519] [2021-11-19 04:37:23,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441004519] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:37:23,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:37:23,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:37:23,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751409203] [2021-11-19 04:37:23,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:37:23,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:37:23,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:37:23,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:37:23,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:37:23,132 INFO L87 Difference]: Start difference. First operand 13710 states and 25063 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 04:37:38,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:37:38,965 INFO L93 Difference]: Finished difference Result 45624 states and 96019 transitions. [2021-11-19 04:37:38,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 04:37:38,966 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 97 [2021-11-19 04:37:38,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:37:39,252 INFO L225 Difference]: With dead ends: 45624 [2021-11-19 04:37:39,252 INFO L226 Difference]: Without dead ends: 31932 [2021-11-19 04:37:39,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-11-19 04:37:39,382 INFO L933 BasicCegarLoop]: 1058 mSDtfsCounter, 3638 mSDsluCounter, 2313 mSDsCounter, 0 mSdLazyCounter, 5653 mSolverCounterSat, 1291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3786 SdHoareTripleChecker+Valid, 3371 SdHoareTripleChecker+Invalid, 6944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1291 IncrementalHoareTripleChecker+Valid, 5653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:37:39,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3786 Valid, 3371 Invalid, 6944 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1291 Valid, 5653 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2021-11-19 04:37:39,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31932 states. [2021-11-19 04:37:44,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31932 to 27348. [2021-11-19 04:37:44,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27348 states, 19428 states have (on average 1.5447292567428454) internal successors, (30011), 20890 states have internal predecessors, (30011), 6490 states have call successors, (6490), 1054 states have call predecessors, (6490), 1429 states have return successors, (16434), 6563 states have call predecessors, (16434), 6472 states have call successors, (16434) [2021-11-19 04:37:44,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27348 states to 27348 states and 52935 transitions. [2021-11-19 04:37:44,747 INFO L78 Accepts]: Start accepts. Automaton has 27348 states and 52935 transitions. Word has length 97 [2021-11-19 04:37:44,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:37:44,748 INFO L470 AbstractCegarLoop]: Abstraction has 27348 states and 52935 transitions. [2021-11-19 04:37:44,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 04:37:44,748 INFO L276 IsEmpty]: Start isEmpty. Operand 27348 states and 52935 transitions. [2021-11-19 04:37:44,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-19 04:37:44,750 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:37:44,751 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:37:44,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-19 04:37:44,751 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:37:44,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:37:44,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1456164769, now seen corresponding path program 1 times [2021-11-19 04:37:44,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:37:44,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160742972] [2021-11-19 04:37:44,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:37:44,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:37:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:37:44,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:37:44,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:37:44,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:37:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:37:44,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:37:45,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:37:45,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:37:45,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:37:45,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 04:37:45,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:37:45,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-19 04:37:45,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:37:45,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 04:37:45,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:37:45,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-19 04:37:45,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:37:45,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 04:37:45,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:37:45,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-19 04:37:45,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:37:45,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-19 04:37:45,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:37:45,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 04:37:45,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:37:45,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160742972] [2021-11-19 04:37:45,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160742972] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:37:45,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:37:45,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 04:37:45,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423870344] [2021-11-19 04:37:45,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:37:45,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:37:45,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:37:45,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:37:45,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:37:45,048 INFO L87 Difference]: Start difference. First operand 27348 states and 52935 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 04:37:54,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:37:54,743 INFO L93 Difference]: Finished difference Result 57604 states and 117312 transitions. [2021-11-19 04:37:54,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:37:54,744 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 98 [2021-11-19 04:37:54,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:37:55,290 INFO L225 Difference]: With dead ends: 57604 [2021-11-19 04:37:55,291 INFO L226 Difference]: Without dead ends: 30274 [2021-11-19 04:37:55,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:37:55,599 INFO L933 BasicCegarLoop]: 873 mSDtfsCounter, 1430 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 2195 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1547 SdHoareTripleChecker+Valid, 1988 SdHoareTripleChecker+Invalid, 2643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 2195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:37:55,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1547 Valid, 1988 Invalid, 2643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 2195 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-11-19 04:37:55,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30274 states.