./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 a24bdc0807d94f83606acfe112db107808ae7409e0ad1ecc1d01e9704d0b4ece --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 14:26:38,210 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 14:26:38,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 14:26:38,251 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 14:26:38,251 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 14:26:38,255 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 14:26:38,257 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 14:26:38,262 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 14:26:38,264 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 14:26:38,268 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 14:26:38,268 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 14:26:38,269 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 14:26:38,270 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 14:26:38,272 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 14:26:38,273 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 14:26:38,275 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 14:26:38,276 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 14:26:38,277 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 14:26:38,281 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 14:26:38,287 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 14:26:38,289 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 14:26:38,290 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 14:26:38,291 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 14:26:38,292 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 14:26:38,294 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 14:26:38,294 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 14:26:38,294 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 14:26:38,296 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 14:26:38,296 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 14:26:38,297 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 14:26:38,297 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 14:26:38,298 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 14:26:38,299 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 14:26:38,301 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 14:26:38,302 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 14:26:38,302 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 14:26:38,302 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 14:26:38,303 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 14:26:38,303 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 14:26:38,304 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 14:26:38,304 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 14:26:38,305 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 14:26:38,336 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 14:26:38,337 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 14:26:38,337 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 14:26:38,337 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 14:26:38,338 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 14:26:38,338 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 14:26:38,339 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 14:26:38,339 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 14:26:38,339 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 14:26:38,339 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 14:26:38,340 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 14:26:38,340 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 14:26:38,340 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 14:26:38,340 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 14:26:38,341 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 14:26:38,341 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 14:26:38,341 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 14:26:38,341 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 14:26:38,341 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 14:26:38,342 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 14:26:38,342 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 14:26:38,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 14:26:38,342 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 14:26:38,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 14:26:38,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 14:26:38,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 14:26:38,343 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 14:26:38,344 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 14:26:38,344 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 14:26:38,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 14:26:38,345 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 14:26:38,345 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 14:26:38,345 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 14:26:38,345 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 14:26:38,345 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a24bdc0807d94f83606acfe112db107808ae7409e0ad1ecc1d01e9704d0b4ece [2021-12-17 14:26:38,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 14:26:38,594 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 14:26:38,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 14:26:38,597 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 14:26:38,598 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 14:26:38,599 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c [2021-12-17 14:26:38,648 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9039fbdd3/d73b4b4673b7424a8740c19aebdc9589/FLAG78ab1e036 [2021-12-17 14:26:39,109 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 14:26:39,110 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c [2021-12-17 14:26:39,142 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9039fbdd3/d73b4b4673b7424a8740c19aebdc9589/FLAG78ab1e036 [2021-12-17 14:26:39,442 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9039fbdd3/d73b4b4673b7424a8740c19aebdc9589 [2021-12-17 14:26:39,444 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 14:26:39,445 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 14:26:39,446 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 14:26:39,446 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 14:26:39,455 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 14:26:39,456 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 02:26:39" (1/1) ... [2021-12-17 14:26:39,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@633b95ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:26:39, skipping insertion in model container [2021-12-17 14:26:39,457 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 02:26:39" (1/1) ... [2021-12-17 14:26:39,462 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 14:26:39,530 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 14:26:39,652 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c[1545,1558] [2021-12-17 14:26:39,896 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 14:26:39,903 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 14:26:39,913 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec1_product01.cil.c[1545,1558] [2021-12-17 14:26:39,974 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 14:26:39,993 INFO L208 MainTranslator]: Completed translation [2021-12-17 14:26:39,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:26:39 WrapperNode [2021-12-17 14:26:39,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 14:26:39,995 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 14:26:39,995 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 14:26:39,995 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 14:26:40,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:26:39" (1/1) ... [2021-12-17 14:26:40,023 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:26:39" (1/1) ... [2021-12-17 14:26:40,057 INFO L137 Inliner]: procedures = 88, calls = 329, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 743 [2021-12-17 14:26:40,063 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 14:26:40,064 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 14:26:40,064 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 14:26:40,064 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 14:26:40,071 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:26:39" (1/1) ... [2021-12-17 14:26:40,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:26:39" (1/1) ... [2021-12-17 14:26:40,085 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:26:39" (1/1) ... [2021-12-17 14:26:40,095 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:26:39" (1/1) ... [2021-12-17 14:26:40,126 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:26:39" (1/1) ... [2021-12-17 14:26:40,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:26:39" (1/1) ... [2021-12-17 14:26:40,175 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:26:39" (1/1) ... [2021-12-17 14:26:40,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 14:26:40,189 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 14:26:40,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 14:26:40,189 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 14:26:40,190 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:26:39" (1/1) ... [2021-12-17 14:26:40,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 14:26:40,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:26:40,228 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 14:26:40,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 14:26:40,264 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-12-17 14:26:40,264 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-12-17 14:26:40,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 14:26:40,265 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-12-17 14:26:40,265 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-12-17 14:26:40,265 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-12-17 14:26:40,265 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-12-17 14:26:40,265 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-12-17 14:26:40,266 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-12-17 14:26:40,266 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-12-17 14:26:40,266 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-12-17 14:26:40,266 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-12-17 14:26:40,266 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-12-17 14:26:40,266 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-12-17 14:26:40,267 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-12-17 14:26:40,267 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-12-17 14:26:40,267 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-12-17 14:26:40,267 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-12-17 14:26:40,267 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-12-17 14:26:40,267 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-12-17 14:26:40,267 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-12-17 14:26:40,268 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-12-17 14:26:40,268 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-12-17 14:26:40,268 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-12-17 14:26:40,268 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-12-17 14:26:40,268 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-12-17 14:26:40,268 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-12-17 14:26:40,269 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-12-17 14:26:40,269 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-12-17 14:26:40,269 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-12-17 14:26:40,269 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-12-17 14:26:40,269 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-12-17 14:26:40,269 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-12-17 14:26:40,269 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-12-17 14:26:40,270 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-12-17 14:26:40,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 14:26:40,270 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-12-17 14:26:40,270 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-12-17 14:26:40,271 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-12-17 14:26:40,271 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-12-17 14:26:40,271 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-12-17 14:26:40,271 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-12-17 14:26:40,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 14:26:40,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 14:26:40,272 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-12-17 14:26:40,272 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-12-17 14:26:40,442 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 14:26:40,444 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 14:26:41,298 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 14:26:41,310 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 14:26:41,310 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 14:26:41,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:26:41 BoogieIcfgContainer [2021-12-17 14:26:41,313 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 14:26:41,314 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 14:26:41,314 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 14:26:41,317 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 14:26:41,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 02:26:39" (1/3) ... [2021-12-17 14:26:41,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4273cdda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 02:26:41, skipping insertion in model container [2021-12-17 14:26:41,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:26:39" (2/3) ... [2021-12-17 14:26:41,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4273cdda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 02:26:41, skipping insertion in model container [2021-12-17 14:26:41,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:26:41" (3/3) ... [2021-12-17 14:26:41,319 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product01.cil.c [2021-12-17 14:26:41,323 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 14:26:41,323 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 14:26:41,361 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 14:26:41,366 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 [2021-12-17 14:26:41,367 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 14:26:41,395 INFO L276 IsEmpty]: Start isEmpty. Operand has 524 states, 412 states have (on average 1.7111650485436893) internal successors, (705), 433 states have internal predecessors, (705), 89 states have call successors, (89), 21 states have call predecessors, (89), 21 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) [2021-12-17 14:26:41,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-17 14:26:41,418 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:26:41,419 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:26:41,420 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:26:41,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:26:41,424 INFO L85 PathProgramCache]: Analyzing trace with hash 775009711, now seen corresponding path program 1 times [2021-12-17 14:26:41,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:26:41,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833469999] [2021-12-17 14:26:41,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:26:41,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:26:41,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:41,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:26:41,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:41,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:41,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:41,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:26:41,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:41,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-17 14:26:41,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:41,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:41,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:41,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:26:41,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:42,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 14:26:42,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:42,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:42,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:42,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:42,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:42,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:26:42,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:42,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 14:26:42,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:42,215 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 14:26:42,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:26:42,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833469999] [2021-12-17 14:26:42,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833469999] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:26:42,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074502563] [2021-12-17 14:26:42,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:26:42,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:26:42,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:26:42,224 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:26:42,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 14:26:42,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:42,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 1762 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-17 14:26:42,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:26:42,797 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 14:26:42,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:26:42,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074502563] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:26:42,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:26:42,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 7 [2021-12-17 14:26:42,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709114375] [2021-12-17 14:26:42,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:26:42,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 14:26:42,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:26:42,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 14:26:42,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 14:26:42,844 INFO L87 Difference]: Start difference. First operand has 524 states, 412 states have (on average 1.7111650485436893) internal successors, (705), 433 states have internal predecessors, (705), 89 states have call successors, (89), 21 states have call predecessors, (89), 21 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) Second operand has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-17 14:26:42,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:26:42,909 INFO L93 Difference]: Finished difference Result 545 states and 913 transitions. [2021-12-17 14:26:42,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 14:26:42,911 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 97 [2021-12-17 14:26:42,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:26:42,935 INFO L225 Difference]: With dead ends: 545 [2021-12-17 14:26:42,936 INFO L226 Difference]: Without dead ends: 516 [2021-12-17 14:26:42,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 14:26:42,945 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:26:42,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:26:42,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-12-17 14:26:43,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 516. [2021-12-17 14:26:43,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 406 states have (on average 1.70935960591133) internal successors, (694), 425 states have internal predecessors, (694), 89 states have call successors, (89), 21 states have call predecessors, (89), 20 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-12-17 14:26:43,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 867 transitions. [2021-12-17 14:26:43,025 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 867 transitions. Word has length 97 [2021-12-17 14:26:43,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:26:43,027 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 867 transitions. [2021-12-17 14:26:43,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-17 14:26:43,027 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 867 transitions. [2021-12-17 14:26:43,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-17 14:26:43,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:26:43,041 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:26:43,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 14:26:43,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-17 14:26:43,242 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:26:43,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:26:43,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1728523875, now seen corresponding path program 1 times [2021-12-17 14:26:43,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:26:43,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418321539] [2021-12-17 14:26:43,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:26:43,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:26:43,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:43,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:26:43,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:43,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:43,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:43,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:26:43,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:43,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-17 14:26:43,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:43,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:43,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:43,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:26:43,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:43,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 14:26:43,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:43,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:43,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:43,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:43,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:43,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:26:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:43,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 14:26:43,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:43,712 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 14:26:43,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:26:43,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418321539] [2021-12-17 14:26:43,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418321539] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:26:43,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514035595] [2021-12-17 14:26:43,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:26:43,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:26:43,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:26:43,720 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:26:43,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 14:26:44,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:44,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 1765 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 14:26:44,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:26:44,268 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 14:26:44,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:26:44,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514035595] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:26:44,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:26:44,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-17 14:26:44,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097477216] [2021-12-17 14:26:44,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:26:44,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:26:44,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:26:44,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:26:44,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:26:44,272 INFO L87 Difference]: Start difference. First operand 516 states and 867 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:26:44,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:26:44,361 INFO L93 Difference]: Finished difference Result 1023 states and 1726 transitions. [2021-12-17 14:26:44,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 14:26:44,362 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 99 [2021-12-17 14:26:44,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:26:44,366 INFO L225 Difference]: With dead ends: 1023 [2021-12-17 14:26:44,366 INFO L226 Difference]: Without dead ends: 516 [2021-12-17 14:26:44,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:26:44,372 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 14 mSDsluCounter, 1699 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2552 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:26:44,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2552 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:26:44,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-12-17 14:26:44,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 516. [2021-12-17 14:26:44,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 406 states have (on average 1.706896551724138) internal successors, (693), 425 states have internal predecessors, (693), 89 states have call successors, (89), 21 states have call predecessors, (89), 20 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-12-17 14:26:44,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 866 transitions. [2021-12-17 14:26:44,400 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 866 transitions. Word has length 99 [2021-12-17 14:26:44,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:26:44,401 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 866 transitions. [2021-12-17 14:26:44,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:26:44,401 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 866 transitions. [2021-12-17 14:26:44,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-17 14:26:44,404 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:26:44,405 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:26:44,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 14:26:44,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-12-17 14:26:44,606 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:26:44,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:26:44,606 INFO L85 PathProgramCache]: Analyzing trace with hash -826883435, now seen corresponding path program 1 times [2021-12-17 14:26:44,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:26:44,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17892718] [2021-12-17 14:26:44,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:26:44,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:26:44,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:44,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:26:44,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:44,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:44,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:44,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:26:44,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:44,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-17 14:26:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:44,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:44,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:44,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:26:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:44,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 14:26:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:44,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:44,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:45,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:45,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:45,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:26:45,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:45,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 14:26:45,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:45,028 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 14:26:45,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:26:45,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17892718] [2021-12-17 14:26:45,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17892718] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:26:45,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895607386] [2021-12-17 14:26:45,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:26:45,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:26:45,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:26:45,031 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:26:45,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 14:26:45,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:45,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 1767 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 14:26:45,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:26:45,518 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 14:26:45,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:26:45,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895607386] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:26:45,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:26:45,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-17 14:26:45,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276298738] [2021-12-17 14:26:45,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:26:45,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:26:45,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:26:45,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:26:45,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:26:45,521 INFO L87 Difference]: Start difference. First operand 516 states and 866 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:26:45,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:26:45,580 INFO L93 Difference]: Finished difference Result 1023 states and 1724 transitions. [2021-12-17 14:26:45,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 14:26:45,581 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 101 [2021-12-17 14:26:45,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:26:45,585 INFO L225 Difference]: With dead ends: 1023 [2021-12-17 14:26:45,585 INFO L226 Difference]: Without dead ends: 516 [2021-12-17 14:26:45,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:26:45,589 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 12 mSDsluCounter, 1699 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2552 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:26:45,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2552 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:26:45,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-12-17 14:26:45,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 516. [2021-12-17 14:26:45,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 406 states have (on average 1.7044334975369457) internal successors, (692), 425 states have internal predecessors, (692), 89 states have call successors, (89), 21 states have call predecessors, (89), 20 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-12-17 14:26:45,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 865 transitions. [2021-12-17 14:26:45,609 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 865 transitions. Word has length 101 [2021-12-17 14:26:45,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:26:45,609 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 865 transitions. [2021-12-17 14:26:45,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:26:45,610 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 865 transitions. [2021-12-17 14:26:45,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-17 14:26:45,612 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:26:45,613 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:26:45,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 14:26:45,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:26:45,834 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:26:45,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:26:45,834 INFO L85 PathProgramCache]: Analyzing trace with hash 834246499, now seen corresponding path program 1 times [2021-12-17 14:26:45,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:26:45,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800584907] [2021-12-17 14:26:45,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:26:45,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:26:45,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:45,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:26:45,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:45,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:45,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:26:45,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:45,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 14:26:45,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:45,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:45,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:45,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:26:45,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:46,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 14:26:46,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:46,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:46,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:46,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:46,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:46,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:26:46,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:46,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 14:26:46,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:46,209 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 14:26:46,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:26:46,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800584907] [2021-12-17 14:26:46,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800584907] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:26:46,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949332701] [2021-12-17 14:26:46,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:26:46,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:26:46,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:26:46,211 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:26:46,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 14:26:46,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:46,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 1769 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 14:26:46,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:26:46,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 14:26:46,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:26:46,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949332701] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:26:46,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:26:46,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-17 14:26:46,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066470242] [2021-12-17 14:26:46,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:26:46,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:26:46,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:26:46,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:26:46,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:26:46,667 INFO L87 Difference]: Start difference. First operand 516 states and 865 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:26:46,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:26:46,728 INFO L93 Difference]: Finished difference Result 1030 states and 1731 transitions. [2021-12-17 14:26:46,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 14:26:46,729 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 103 [2021-12-17 14:26:46,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:26:46,734 INFO L225 Difference]: With dead ends: 1030 [2021-12-17 14:26:46,734 INFO L226 Difference]: Without dead ends: 525 [2021-12-17 14:26:46,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:26:46,739 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 20 mSDsluCounter, 1699 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 2552 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:26:46,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 2552 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:26:46,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-12-17 14:26:46,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 525. [2021-12-17 14:26:46,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 414 states have (on average 1.7004830917874396) internal successors, (704), 433 states have internal predecessors, (704), 89 states have call successors, (89), 22 states have call predecessors, (89), 21 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-12-17 14:26:46,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 877 transitions. [2021-12-17 14:26:46,763 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 877 transitions. Word has length 103 [2021-12-17 14:26:46,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:26:46,764 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 877 transitions. [2021-12-17 14:26:46,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:26:46,764 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 877 transitions. [2021-12-17 14:26:46,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-17 14:26:46,767 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:26:46,767 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:26:46,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-17 14:26:46,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:26:46,983 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:26:46,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:26:46,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1162426420, now seen corresponding path program 1 times [2021-12-17 14:26:46,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:26:46,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196334826] [2021-12-17 14:26:46,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:26:46,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:26:47,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:47,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:26:47,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:47,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:47,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:47,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 14:26:47,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:47,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 14:26:47,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:47,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:47,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:47,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:26:47,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:47,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 14:26:47,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:47,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:47,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:47,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:47,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:47,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:26:47,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:47,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 14:26:47,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:47,331 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 14:26:47,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:26:47,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196334826] [2021-12-17 14:26:47,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196334826] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:26:47,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087603221] [2021-12-17 14:26:47,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:26:47,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:26:47,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:26:47,334 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:26:47,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 14:26:47,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:47,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 1770 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 14:26:47,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:26:47,769 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 14:26:47,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:26:47,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087603221] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:26:47,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:26:47,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-17 14:26:47,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050879679] [2021-12-17 14:26:47,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:26:47,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:26:47,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:26:47,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:26:47,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:26:47,772 INFO L87 Difference]: Start difference. First operand 525 states and 877 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:26:47,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:26:47,839 INFO L93 Difference]: Finished difference Result 1032 states and 1732 transitions. [2021-12-17 14:26:47,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 14:26:47,839 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 104 [2021-12-17 14:26:47,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:26:47,842 INFO L225 Difference]: With dead ends: 1032 [2021-12-17 14:26:47,843 INFO L226 Difference]: Without dead ends: 525 [2021-12-17 14:26:47,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:26:47,845 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 18 mSDsluCounter, 1699 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2552 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:26:47,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 2552 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:26:47,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-12-17 14:26:47,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 525. [2021-12-17 14:26:47,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 414 states have (on average 1.6980676328502415) internal successors, (703), 433 states have internal predecessors, (703), 89 states have call successors, (89), 22 states have call predecessors, (89), 21 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-12-17 14:26:47,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 876 transitions. [2021-12-17 14:26:47,877 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 876 transitions. Word has length 104 [2021-12-17 14:26:47,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:26:47,877 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 876 transitions. [2021-12-17 14:26:47,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:26:47,878 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 876 transitions. [2021-12-17 14:26:47,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-17 14:26:47,880 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:26:47,880 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:26:47,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 14:26:48,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:26:48,103 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:26:48,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:26:48,104 INFO L85 PathProgramCache]: Analyzing trace with hash -176244601, now seen corresponding path program 1 times [2021-12-17 14:26:48,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:26:48,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931839284] [2021-12-17 14:26:48,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:26:48,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:26:48,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:48,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:26:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:48,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:48,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:48,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:26:48,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:48,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 14:26:48,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:48,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:48,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:48,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:26:48,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:48,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-17 14:26:48,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:48,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:48,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:48,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:48,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:48,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:26:48,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:48,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 14:26:48,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:48,446 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 14:26:48,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:26:48,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931839284] [2021-12-17 14:26:48,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931839284] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:26:48,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950376713] [2021-12-17 14:26:48,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:26:48,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:26:48,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:26:48,448 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:26:48,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 14:26:48,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:48,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 1771 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 14:26:48,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:26:48,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 14:26:48,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:26:48,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950376713] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:26:48,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:26:48,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-17 14:26:48,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935698768] [2021-12-17 14:26:48,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:26:48,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:26:48,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:26:48,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:26:48,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:26:48,890 INFO L87 Difference]: Start difference. First operand 525 states and 876 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:26:48,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:26:48,953 INFO L93 Difference]: Finished difference Result 1032 states and 1731 transitions. [2021-12-17 14:26:48,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 14:26:48,954 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 105 [2021-12-17 14:26:48,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:26:48,957 INFO L225 Difference]: With dead ends: 1032 [2021-12-17 14:26:48,957 INFO L226 Difference]: Without dead ends: 525 [2021-12-17 14:26:48,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:26:48,961 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 17 mSDsluCounter, 1699 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 2552 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:26:48,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 2552 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:26:48,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-12-17 14:26:48,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 525. [2021-12-17 14:26:48,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 414 states have (on average 1.6956521739130435) internal successors, (702), 433 states have internal predecessors, (702), 89 states have call successors, (89), 22 states have call predecessors, (89), 21 states have return successors, (84), 82 states have call predecessors, (84), 84 states have call successors, (84) [2021-12-17 14:26:48,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 875 transitions. [2021-12-17 14:26:48,979 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 875 transitions. Word has length 105 [2021-12-17 14:26:48,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:26:48,980 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 875 transitions. [2021-12-17 14:26:48,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:26:48,980 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 875 transitions. [2021-12-17 14:26:48,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-17 14:26:48,982 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:26:48,983 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:26:49,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 14:26:49,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:26:49,208 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:26:49,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:26:49,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1210846416, now seen corresponding path program 1 times [2021-12-17 14:26:49,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:26:49,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270708039] [2021-12-17 14:26:49,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:26:49,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:26:49,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:49,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:26:49,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:49,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:49,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:49,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:26:49,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:49,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-17 14:26:49,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:49,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:49,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:49,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:26:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:49,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 14:26:49,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:49,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:49,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:49,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:49,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:49,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:26:49,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:49,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 14:26:49,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:49,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 14:26:49,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:26:49,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270708039] [2021-12-17 14:26:49,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270708039] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:26:49,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252248848] [2021-12-17 14:26:49,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:26:49,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:26:49,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:26:49,659 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:26:49,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 14:26:49,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:49,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 1772 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 14:26:49,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:26:50,154 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 14:26:50,154 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:26:50,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252248848] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:26:50,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:26:50,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 17 [2021-12-17 14:26:50,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895505940] [2021-12-17 14:26:50,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:26:50,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 14:26:50,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:26:50,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 14:26:50,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-12-17 14:26:50,157 INFO L87 Difference]: Start difference. First operand 525 states and 875 transitions. Second operand has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 14:26:50,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:26:50,245 INFO L93 Difference]: Finished difference Result 1051 states and 1761 transitions. [2021-12-17 14:26:50,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 14:26:50,245 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 106 [2021-12-17 14:26:50,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:26:50,249 INFO L225 Difference]: With dead ends: 1051 [2021-12-17 14:26:50,249 INFO L226 Difference]: Without dead ends: 548 [2021-12-17 14:26:50,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-12-17 14:26:50,252 INFO L933 BasicCegarLoop]: 854 mSDtfsCounter, 148 mSDsluCounter, 4162 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5016 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:26:50,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5016 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:26:50,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-12-17 14:26:50,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 544. [2021-12-17 14:26:50,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 430 states have (on average 1.6930232558139535) internal successors, (728), 451 states have internal predecessors, (728), 90 states have call successors, (90), 22 states have call predecessors, (90), 23 states have return successors, (88), 83 states have call predecessors, (88), 85 states have call successors, (88) [2021-12-17 14:26:50,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 906 transitions. [2021-12-17 14:26:50,269 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 906 transitions. Word has length 106 [2021-12-17 14:26:50,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:26:50,269 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 906 transitions. [2021-12-17 14:26:50,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 14:26:50,270 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 906 transitions. [2021-12-17 14:26:50,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-17 14:26:50,272 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:26:50,273 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:26:50,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 14:26:50,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:26:50,494 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:26:50,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:26:50,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1596213199, now seen corresponding path program 1 times [2021-12-17 14:26:50,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:26:50,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660981030] [2021-12-17 14:26:50,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:26:50,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:26:50,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:50,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:26:50,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:50,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:50,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:50,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:26:50,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:50,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-17 14:26:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:50,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:50,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:50,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:26:50,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:50,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 14:26:50,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:50,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:50,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:50,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:50,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:50,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:26:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:50,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 14:26:50,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:50,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 14:26:50,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:26:50,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660981030] [2021-12-17 14:26:50,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660981030] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:26:50,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328846366] [2021-12-17 14:26:50,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:26:50,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:26:50,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:26:50,837 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:26:50,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 14:26:51,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:51,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 1771 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 14:26:51,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:26:51,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 14:26:51,319 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:26:51,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328846366] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:26:51,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:26:51,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-17 14:26:51,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822618585] [2021-12-17 14:26:51,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:26:51,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:26:51,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:26:51,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:26:51,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:26:51,321 INFO L87 Difference]: Start difference. First operand 544 states and 906 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:26:51,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:26:51,435 INFO L93 Difference]: Finished difference Result 1092 states and 1835 transitions. [2021-12-17 14:26:51,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 14:26:51,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 106 [2021-12-17 14:26:51,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:26:51,440 INFO L225 Difference]: With dead ends: 1092 [2021-12-17 14:26:51,440 INFO L226 Difference]: Without dead ends: 544 [2021-12-17 14:26:51,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:26:51,443 INFO L933 BasicCegarLoop]: 803 mSDtfsCounter, 135 mSDsluCounter, 1566 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 2369 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:26:51,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 2369 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:26:51,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-12-17 14:26:51,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 544. [2021-12-17 14:26:51,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 430 states have (on average 1.6813953488372093) internal successors, (723), 451 states have internal predecessors, (723), 90 states have call successors, (90), 22 states have call predecessors, (90), 23 states have return successors, (88), 83 states have call predecessors, (88), 85 states have call successors, (88) [2021-12-17 14:26:51,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 901 transitions. [2021-12-17 14:26:51,460 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 901 transitions. Word has length 106 [2021-12-17 14:26:51,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:26:51,461 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 901 transitions. [2021-12-17 14:26:51,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:26:51,461 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 901 transitions. [2021-12-17 14:26:51,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-17 14:26:51,463 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:26:51,463 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:26:51,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-17 14:26:51,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-17 14:26:51,680 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:26:51,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:26:51,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1554473517, now seen corresponding path program 1 times [2021-12-17 14:26:51,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:26:51,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453548105] [2021-12-17 14:26:51,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:26:51,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:26:51,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:51,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:26:51,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:51,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:51,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:51,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:26:51,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:51,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-17 14:26:51,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:51,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:51,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:51,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:26:51,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:51,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 14:26:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:52,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:52,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:52,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:52,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:52,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:26:52,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:52,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 14:26:52,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:52,032 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 14:26:52,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:26:52,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453548105] [2021-12-17 14:26:52,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453548105] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:26:52,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767090408] [2021-12-17 14:26:52,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:26:52,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:26:52,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:26:52,033 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:26:52,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 14:26:52,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:52,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 1773 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 14:26:52,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:26:52,497 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 14:26:52,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:26:52,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767090408] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:26:52,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:26:52,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-17 14:26:52,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612345829] [2021-12-17 14:26:52,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:26:52,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:26:52,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:26:52,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:26:52,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:26:52,500 INFO L87 Difference]: Start difference. First operand 544 states and 901 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:26:52,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:26:52,600 INFO L93 Difference]: Finished difference Result 1092 states and 1825 transitions. [2021-12-17 14:26:52,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 14:26:52,601 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 108 [2021-12-17 14:26:52,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:26:52,605 INFO L225 Difference]: With dead ends: 1092 [2021-12-17 14:26:52,605 INFO L226 Difference]: Without dead ends: 544 [2021-12-17 14:26:52,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:26:52,609 INFO L933 BasicCegarLoop]: 803 mSDtfsCounter, 129 mSDsluCounter, 1566 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 2369 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:26:52,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 2369 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:26:52,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-12-17 14:26:52,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 544. [2021-12-17 14:26:52,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 430 states have (on average 1.669767441860465) internal successors, (718), 451 states have internal predecessors, (718), 90 states have call successors, (90), 22 states have call predecessors, (90), 23 states have return successors, (88), 83 states have call predecessors, (88), 85 states have call successors, (88) [2021-12-17 14:26:52,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 896 transitions. [2021-12-17 14:26:52,625 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 896 transitions. Word has length 108 [2021-12-17 14:26:52,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:26:52,625 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 896 transitions. [2021-12-17 14:26:52,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:26:52,626 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 896 transitions. [2021-12-17 14:26:52,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-17 14:26:52,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:26:52,628 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:26:52,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 14:26:52,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:26:52,842 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:26:52,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:26:52,843 INFO L85 PathProgramCache]: Analyzing trace with hash -747741871, now seen corresponding path program 1 times [2021-12-17 14:26:52,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:26:52,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311868289] [2021-12-17 14:26:52,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:26:52,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:26:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:52,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:26:52,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:52,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:52,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:52,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:26:52,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:52,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 14:26:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:52,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:52,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:52,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:26:53,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:53,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-17 14:26:53,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:53,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:53,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:53,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:53,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:53,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:26:53,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:53,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 14:26:53,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:53,178 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 14:26:53,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:26:53,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311868289] [2021-12-17 14:26:53,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311868289] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:26:53,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936417193] [2021-12-17 14:26:53,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:26:53,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:26:53,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:26:53,184 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:26:53,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 14:26:53,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:53,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 1775 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 14:26:53,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:26:53,689 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 14:26:53,689 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:26:53,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936417193] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:26:53,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:26:53,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-17 14:26:53,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825699548] [2021-12-17 14:26:53,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:26:53,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:26:53,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:26:53,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:26:53,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:26:53,691 INFO L87 Difference]: Start difference. First operand 544 states and 896 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:26:53,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:26:53,831 INFO L93 Difference]: Finished difference Result 1128 states and 1873 transitions. [2021-12-17 14:26:53,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 14:26:53,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 110 [2021-12-17 14:26:53,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:26:53,835 INFO L225 Difference]: With dead ends: 1128 [2021-12-17 14:26:53,835 INFO L226 Difference]: Without dead ends: 610 [2021-12-17 14:26:53,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:26:53,839 INFO L933 BasicCegarLoop]: 813 mSDtfsCounter, 179 mSDsluCounter, 1566 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 2379 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:26:53,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 2379 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:26:53,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-12-17 14:26:53,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 595. [2021-12-17 14:26:53,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 480 states have (on average 1.6729166666666666) internal successors, (803), 501 states have internal predecessors, (803), 90 states have call successors, (90), 23 states have call predecessors, (90), 24 states have return successors, (87), 83 states have call predecessors, (87), 85 states have call successors, (87) [2021-12-17 14:26:53,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 980 transitions. [2021-12-17 14:26:53,858 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 980 transitions. Word has length 110 [2021-12-17 14:26:53,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:26:53,859 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 980 transitions. [2021-12-17 14:26:53,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:26:53,859 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 980 transitions. [2021-12-17 14:26:53,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-17 14:26:53,861 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:26:53,862 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:26:53,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 14:26:54,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-17 14:26:54,087 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:26:54,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:26:54,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1074440038, now seen corresponding path program 1 times [2021-12-17 14:26:54,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:26:54,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45404444] [2021-12-17 14:26:54,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:26:54,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:26:54,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:54,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:26:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:54,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:54,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:54,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:26:54,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:54,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 14:26:54,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:54,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:54,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:54,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:26:54,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:54,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-17 14:26:54,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:54,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:54,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:54,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:54,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:54,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:26:54,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:54,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 14:26:54,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:54,443 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 14:26:54,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:26:54,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45404444] [2021-12-17 14:26:54,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45404444] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:26:54,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105402913] [2021-12-17 14:26:54,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:26:54,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:26:54,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:26:54,452 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:26:54,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 14:26:54,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:54,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 1773 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 14:26:54,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:26:54,949 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 14:26:54,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:26:54,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105402913] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:26:54,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:26:54,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2021-12-17 14:26:54,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811970493] [2021-12-17 14:26:54,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:26:54,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 14:26:54,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:26:54,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 14:26:54,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-12-17 14:26:54,951 INFO L87 Difference]: Start difference. First operand 595 states and 980 transitions. Second operand has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 14:26:55,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:26:55,088 INFO L93 Difference]: Finished difference Result 1120 states and 1853 transitions. [2021-12-17 14:26:55,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 14:26:55,089 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2021-12-17 14:26:55,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:26:55,092 INFO L225 Difference]: With dead ends: 1120 [2021-12-17 14:26:55,093 INFO L226 Difference]: Without dead ends: 617 [2021-12-17 14:26:55,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-12-17 14:26:55,095 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 177 mSDsluCounter, 4902 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 5736 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:26:55,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 5736 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:26:55,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-12-17 14:26:55,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 595. [2021-12-17 14:26:55,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 480 states have (on average 1.6729166666666666) internal successors, (803), 501 states have internal predecessors, (803), 90 states have call successors, (90), 23 states have call predecessors, (90), 24 states have return successors, (87), 83 states have call predecessors, (87), 85 states have call successors, (87) [2021-12-17 14:26:55,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 980 transitions. [2021-12-17 14:26:55,117 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 980 transitions. Word has length 111 [2021-12-17 14:26:55,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:26:55,117 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 980 transitions. [2021-12-17 14:26:55,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 14:26:55,118 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 980 transitions. [2021-12-17 14:26:55,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-17 14:26:55,121 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:26:55,121 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:26:55,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-17 14:26:55,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-17 14:26:55,336 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:26:55,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:26:55,336 INFO L85 PathProgramCache]: Analyzing trace with hash 264952581, now seen corresponding path program 1 times [2021-12-17 14:26:55,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:26:55,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184116918] [2021-12-17 14:26:55,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:26:55,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:26:55,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:55,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:26:55,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:55,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:55,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:55,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:26:55,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:55,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 14:26:55,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:55,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:55,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:55,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:26:55,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:55,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-17 14:26:55,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:55,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:55,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:55,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:55,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:55,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:26:55,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:55,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 14:26:55,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:55,683 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-17 14:26:55,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:26:55,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184116918] [2021-12-17 14:26:55,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184116918] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:26:55,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906211529] [2021-12-17 14:26:55,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:26:55,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:26:55,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:26:55,687 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:26:55,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-17 14:26:55,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:55,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 1772 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 14:26:55,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:26:56,119 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 14:26:56,120 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:26:56,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906211529] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:26:56,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:26:56,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-12-17 14:26:56,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410179688] [2021-12-17 14:26:56,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:26:56,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 14:26:56,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:26:56,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 14:26:56,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-12-17 14:26:56,122 INFO L87 Difference]: Start difference. First operand 595 states and 980 transitions. Second operand has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 14:26:56,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:26:56,218 INFO L93 Difference]: Finished difference Result 1055 states and 1750 transitions. [2021-12-17 14:26:56,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 14:26:56,219 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2021-12-17 14:26:56,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:26:56,222 INFO L225 Difference]: With dead ends: 1055 [2021-12-17 14:26:56,222 INFO L226 Difference]: Without dead ends: 619 [2021-12-17 14:26:56,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-12-17 14:26:56,225 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 134 mSDsluCounter, 4129 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 4975 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:26:56,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 4975 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:26:56,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-12-17 14:26:56,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 614. [2021-12-17 14:26:56,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 496 states have (on average 1.6713709677419355) internal successors, (829), 519 states have internal predecessors, (829), 91 states have call successors, (91), 23 states have call predecessors, (91), 26 states have return successors, (90), 84 states have call predecessors, (90), 86 states have call successors, (90) [2021-12-17 14:26:56,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1010 transitions. [2021-12-17 14:26:56,245 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1010 transitions. Word has length 111 [2021-12-17 14:26:56,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:26:56,245 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 1010 transitions. [2021-12-17 14:26:56,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 14:26:56,245 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1010 transitions. [2021-12-17 14:26:56,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 14:26:56,248 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:26:56,249 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:26:56,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-17 14:26:56,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-17 14:26:56,468 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:26:56,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:26:56,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1444130015, now seen corresponding path program 1 times [2021-12-17 14:26:56,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:26:56,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446372948] [2021-12-17 14:26:56,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:26:56,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:26:56,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:56,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:26:56,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:56,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:56,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:56,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:26:56,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:56,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 14:26:56,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:56,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:56,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:56,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:26:56,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:56,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 14:26:56,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:56,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:56,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:56,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:56,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:56,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:26:56,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:56,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 14:26:56,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:56,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-17 14:26:56,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:26:56,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446372948] [2021-12-17 14:26:56,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446372948] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:26:56,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777228118] [2021-12-17 14:26:56,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:26:56,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:26:56,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:26:56,815 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:26:56,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-17 14:26:57,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:57,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 1773 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 14:26:57,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:26:57,284 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 14:26:57,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:26:57,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777228118] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:26:57,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:26:57,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-12-17 14:26:57,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513820294] [2021-12-17 14:26:57,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:26:57,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 14:26:57,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:26:57,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 14:26:57,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-12-17 14:26:57,287 INFO L87 Difference]: Start difference. First operand 614 states and 1010 transitions. Second operand has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 14:26:57,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:26:57,375 INFO L93 Difference]: Finished difference Result 1085 states and 1801 transitions. [2021-12-17 14:26:57,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 14:26:57,376 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 112 [2021-12-17 14:26:57,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:26:57,380 INFO L225 Difference]: With dead ends: 1085 [2021-12-17 14:26:57,380 INFO L226 Difference]: Without dead ends: 649 [2021-12-17 14:26:57,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-12-17 14:26:57,383 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 143 mSDsluCounter, 4119 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 4965 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:26:57,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 4965 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:26:57,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-12-17 14:26:57,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 614. [2021-12-17 14:26:57,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 496 states have (on average 1.6713709677419355) internal successors, (829), 519 states have internal predecessors, (829), 91 states have call successors, (91), 23 states have call predecessors, (91), 26 states have return successors, (90), 84 states have call predecessors, (90), 86 states have call successors, (90) [2021-12-17 14:26:57,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1010 transitions. [2021-12-17 14:26:57,399 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1010 transitions. Word has length 112 [2021-12-17 14:26:57,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:26:57,400 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 1010 transitions. [2021-12-17 14:26:57,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 14:26:57,400 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1010 transitions. [2021-12-17 14:26:57,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 14:26:57,402 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:26:57,403 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:26:57,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-17 14:26:57,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 14:26:57,619 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:26:57,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:26:57,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1512634017, now seen corresponding path program 1 times [2021-12-17 14:26:57,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:26:57,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607966088] [2021-12-17 14:26:57,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:26:57,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:26:57,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:57,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:26:57,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:57,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:57,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:57,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:26:57,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:57,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 14:26:57,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:57,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:57,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:57,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:26:57,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:57,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 14:26:57,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:57,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:57,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:57,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:57,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:57,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:26:57,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:57,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 14:26:57,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:58,001 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-17 14:26:58,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:26:58,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607966088] [2021-12-17 14:26:58,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607966088] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:26:58,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254682366] [2021-12-17 14:26:58,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:26:58,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:26:58,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:26:58,004 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:26:58,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-17 14:26:58,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:58,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 1769 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 14:26:58,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:26:58,445 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 14:26:58,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:26:58,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254682366] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:26:58,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:26:58,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-12-17 14:26:58,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975555666] [2021-12-17 14:26:58,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:26:58,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 14:26:58,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:26:58,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 14:26:58,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-17 14:26:58,448 INFO L87 Difference]: Start difference. First operand 614 states and 1010 transitions. Second operand has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 14:26:58,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:26:58,570 INFO L93 Difference]: Finished difference Result 1070 states and 1775 transitions. [2021-12-17 14:26:58,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 14:26:58,570 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 112 [2021-12-17 14:26:58,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:26:58,574 INFO L225 Difference]: With dead ends: 1070 [2021-12-17 14:26:58,574 INFO L226 Difference]: Without dead ends: 634 [2021-12-17 14:26:58,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-12-17 14:26:58,576 INFO L933 BasicCegarLoop]: 836 mSDtfsCounter, 177 mSDsluCounter, 4908 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 5744 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:26:58,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 5744 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:26:58,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-12-17 14:26:58,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 614. [2021-12-17 14:26:58,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 496 states have (on average 1.6713709677419355) internal successors, (829), 519 states have internal predecessors, (829), 91 states have call successors, (91), 23 states have call predecessors, (91), 26 states have return successors, (90), 84 states have call predecessors, (90), 86 states have call successors, (90) [2021-12-17 14:26:58,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1010 transitions. [2021-12-17 14:26:58,593 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1010 transitions. Word has length 112 [2021-12-17 14:26:58,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:26:58,593 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 1010 transitions. [2021-12-17 14:26:58,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 14:26:58,593 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1010 transitions. [2021-12-17 14:26:58,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 14:26:58,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:26:58,596 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:26:58,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-17 14:26:58,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:26:58,819 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:26:58,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:26:58,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1594958174, now seen corresponding path program 1 times [2021-12-17 14:26:58,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:26:58,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324419803] [2021-12-17 14:26:58,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:26:58,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:26:58,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:58,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:26:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:58,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:58,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:58,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:26:58,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:58,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 14:26:58,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:58,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:58,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:58,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 14:26:58,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:59,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 14:26:59,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:59,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:59,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:59,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:59,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:59,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:26:59,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:59,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 14:26:59,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 14:26:59,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:26:59,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324419803] [2021-12-17 14:26:59,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324419803] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:26:59,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762456077] [2021-12-17 14:26:59,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:26:59,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:26:59,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:26:59,160 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:26:59,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-17 14:26:59,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:59,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 1773 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 14:26:59,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:26:59,532 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 14:26:59,533 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:26:59,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762456077] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:26:59,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:26:59,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-17 14:26:59,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114512856] [2021-12-17 14:26:59,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:26:59,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:26:59,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:26:59,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:26:59,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:26:59,534 INFO L87 Difference]: Start difference. First operand 614 states and 1010 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:26:59,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:26:59,581 INFO L93 Difference]: Finished difference Result 1122 states and 1860 transitions. [2021-12-17 14:26:59,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 14:26:59,581 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 112 [2021-12-17 14:26:59,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:26:59,584 INFO L225 Difference]: With dead ends: 1122 [2021-12-17 14:26:59,584 INFO L226 Difference]: Without dead ends: 614 [2021-12-17 14:26:59,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:26:59,587 INFO L933 BasicCegarLoop]: 842 mSDtfsCounter, 23 mSDsluCounter, 1679 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 2521 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:26:59,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 2521 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:26:59,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-12-17 14:26:59,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2021-12-17 14:26:59,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 496 states have (on average 1.6633064516129032) internal successors, (825), 519 states have internal predecessors, (825), 91 states have call successors, (91), 23 states have call predecessors, (91), 26 states have return successors, (90), 84 states have call predecessors, (90), 86 states have call successors, (90) [2021-12-17 14:26:59,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1006 transitions. [2021-12-17 14:26:59,603 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1006 transitions. Word has length 112 [2021-12-17 14:26:59,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:26:59,603 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 1006 transitions. [2021-12-17 14:26:59,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:26:59,604 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1006 transitions. [2021-12-17 14:26:59,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-17 14:26:59,606 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:26:59,606 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:26:59,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-17 14:26:59,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-17 14:26:59,827 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:26:59,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:26:59,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1896184669, now seen corresponding path program 1 times [2021-12-17 14:26:59,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:26:59,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591652939] [2021-12-17 14:26:59,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:26:59,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:26:59,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:59,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:26:59,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:59,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:59,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:59,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:26:59,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:59,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 14:26:59,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:59,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:26:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:26:59,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:26:59,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:00,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 14:27:00,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:00,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:00,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:00,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:00,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:00,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:27:00,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:00,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 14:27:00,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:00,161 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-17 14:27:00,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:27:00,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591652939] [2021-12-17 14:27:00,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591652939] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:27:00,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475062589] [2021-12-17 14:27:00,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:27:00,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:27:00,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:27:00,163 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:27:00,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-17 14:27:00,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:00,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 1770 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 14:27:00,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:27:00,636 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 14:27:00,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:27:00,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475062589] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:27:00,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:27:00,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-12-17 14:27:00,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692270786] [2021-12-17 14:27:00,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:27:00,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 14:27:00,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:27:00,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 14:27:00,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-17 14:27:00,637 INFO L87 Difference]: Start difference. First operand 614 states and 1006 transitions. Second operand has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 14:27:00,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:27:00,747 INFO L93 Difference]: Finished difference Result 1070 states and 1772 transitions. [2021-12-17 14:27:00,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 14:27:00,748 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 113 [2021-12-17 14:27:00,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:27:00,752 INFO L225 Difference]: With dead ends: 1070 [2021-12-17 14:27:00,752 INFO L226 Difference]: Without dead ends: 634 [2021-12-17 14:27:00,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-12-17 14:27:00,754 INFO L933 BasicCegarLoop]: 830 mSDtfsCounter, 185 mSDsluCounter, 4870 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 5700 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:27:00,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 5700 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:27:00,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-12-17 14:27:00,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 614. [2021-12-17 14:27:00,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 496 states have (on average 1.6633064516129032) internal successors, (825), 519 states have internal predecessors, (825), 91 states have call successors, (91), 23 states have call predecessors, (91), 26 states have return successors, (90), 84 states have call predecessors, (90), 86 states have call successors, (90) [2021-12-17 14:27:00,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1006 transitions. [2021-12-17 14:27:00,772 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1006 transitions. Word has length 113 [2021-12-17 14:27:00,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:27:00,772 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 1006 transitions. [2021-12-17 14:27:00,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 14:27:00,772 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1006 transitions. [2021-12-17 14:27:00,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-17 14:27:00,775 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:27:00,775 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:27:00,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-17 14:27:00,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-17 14:27:00,991 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:27:00,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:27:00,992 INFO L85 PathProgramCache]: Analyzing trace with hash -632622236, now seen corresponding path program 1 times [2021-12-17 14:27:00,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:27:00,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83694350] [2021-12-17 14:27:00,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:27:00,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:27:01,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:01,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:27:01,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:01,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:01,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:01,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:27:01,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:01,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 14:27:01,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:01,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:01,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:01,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:27:01,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:01,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 14:27:01,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:01,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:01,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:01,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:01,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:01,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:27:01,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:01,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 14:27:01,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:01,288 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-17 14:27:01,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:27:01,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83694350] [2021-12-17 14:27:01,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83694350] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:27:01,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889344348] [2021-12-17 14:27:01,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:27:01,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:27:01,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:27:01,291 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:27:01,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-17 14:27:01,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:01,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 1771 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 14:27:01,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:27:01,669 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 14:27:01,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:27:01,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889344348] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:27:01,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:27:01,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-17 14:27:01,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110292770] [2021-12-17 14:27:01,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:27:01,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:27:01,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:27:01,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:27:01,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:27:01,671 INFO L87 Difference]: Start difference. First operand 614 states and 1006 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:27:01,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:27:01,710 INFO L93 Difference]: Finished difference Result 1178 states and 1942 transitions. [2021-12-17 14:27:01,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 14:27:01,715 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 114 [2021-12-17 14:27:01,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:27:01,719 INFO L225 Difference]: With dead ends: 1178 [2021-12-17 14:27:01,719 INFO L226 Difference]: Without dead ends: 650 [2021-12-17 14:27:01,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:27:01,722 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 38 mSDsluCounter, 1663 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 2497 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:27:01,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 2497 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:27:01,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-12-17 14:27:01,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 638. [2021-12-17 14:27:01,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 520 states have (on average 1.6403846153846153) internal successors, (853), 543 states have internal predecessors, (853), 91 states have call successors, (91), 23 states have call predecessors, (91), 26 states have return successors, (90), 84 states have call predecessors, (90), 86 states have call successors, (90) [2021-12-17 14:27:01,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1034 transitions. [2021-12-17 14:27:01,740 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1034 transitions. Word has length 114 [2021-12-17 14:27:01,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:27:01,741 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1034 transitions. [2021-12-17 14:27:01,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:27:01,741 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1034 transitions. [2021-12-17 14:27:01,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-17 14:27:01,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:27:01,744 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:27:01,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-17 14:27:01,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-17 14:27:01,960 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:27:01,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:27:01,960 INFO L85 PathProgramCache]: Analyzing trace with hash -729426023, now seen corresponding path program 1 times [2021-12-17 14:27:01,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:27:01,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367991367] [2021-12-17 14:27:01,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:27:01,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:27:01,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:02,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:27:02,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:02,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:02,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:02,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:27:02,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:02,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 14:27:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:02,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:02,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:02,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:27:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:02,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 14:27:02,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:02,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:02,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:02,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:02,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:02,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 14:27:02,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:02,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 14:27:02,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:02,280 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 14:27:02,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:27:02,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367991367] [2021-12-17 14:27:02,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367991367] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:27:02,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837852156] [2021-12-17 14:27:02,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:27:02,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:27:02,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:27:02,281 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:27:02,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-17 14:27:02,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:02,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 1774 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 14:27:02,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:27:02,677 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 14:27:02,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:27:02,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837852156] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:27:02,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:27:02,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-17 14:27:02,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418107449] [2021-12-17 14:27:02,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:27:02,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:27:02,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:27:02,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:27:02,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:27:02,679 INFO L87 Difference]: Start difference. First operand 638 states and 1034 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:27:02,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:27:02,819 INFO L93 Difference]: Finished difference Result 1188 states and 1971 transitions. [2021-12-17 14:27:02,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 14:27:02,820 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 114 [2021-12-17 14:27:02,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:27:02,824 INFO L225 Difference]: With dead ends: 1188 [2021-12-17 14:27:02,824 INFO L226 Difference]: Without dead ends: 757 [2021-12-17 14:27:02,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:27:02,827 INFO L933 BasicCegarLoop]: 957 mSDtfsCounter, 215 mSDsluCounter, 1717 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 2674 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:27:02,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 2674 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:27:02,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-12-17 14:27:02,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 640. [2021-12-17 14:27:02,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 522 states have (on average 1.6379310344827587) internal successors, (855), 545 states have internal predecessors, (855), 91 states have call successors, (91), 23 states have call predecessors, (91), 26 states have return successors, (90), 84 states have call predecessors, (90), 86 states have call successors, (90) [2021-12-17 14:27:02,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1036 transitions. [2021-12-17 14:27:02,847 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1036 transitions. Word has length 114 [2021-12-17 14:27:02,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:27:02,847 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 1036 transitions. [2021-12-17 14:27:02,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:27:02,848 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1036 transitions. [2021-12-17 14:27:02,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-17 14:27:02,851 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:27:02,851 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:27:02,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-17 14:27:03,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-17 14:27:03,067 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:27:03,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:27:03,068 INFO L85 PathProgramCache]: Analyzing trace with hash 339157456, now seen corresponding path program 1 times [2021-12-17 14:27:03,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:27:03,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004834015] [2021-12-17 14:27:03,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:27:03,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:27:03,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:03,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:27:03,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:03,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:03,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:03,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:27:03,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:03,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 14:27:03,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:03,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:03,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:03,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:27:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:03,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 14:27:03,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:03,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:03,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:03,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:03,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:03,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:27:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:03,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 14:27:03,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:03,364 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 14:27:03,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:27:03,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004834015] [2021-12-17 14:27:03,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004834015] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:27:03,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253103071] [2021-12-17 14:27:03,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:27:03,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:27:03,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:27:03,366 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:27:03,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-17 14:27:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:03,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 1791 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 14:27:03,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:27:03,925 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 14:27:03,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:27:03,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253103071] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:27:03,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:27:03,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 14 [2021-12-17 14:27:03,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275465845] [2021-12-17 14:27:03,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:27:03,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 14:27:03,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:27:03,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 14:27:03,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-12-17 14:27:03,929 INFO L87 Difference]: Start difference. First operand 640 states and 1036 transitions. Second operand has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-17 14:27:06,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:27:06,843 INFO L93 Difference]: Finished difference Result 1892 states and 3174 transitions. [2021-12-17 14:27:06,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 14:27:06,844 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 117 [2021-12-17 14:27:06,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:27:06,853 INFO L225 Difference]: With dead ends: 1892 [2021-12-17 14:27:06,853 INFO L226 Difference]: Without dead ends: 1459 [2021-12-17 14:27:06,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-12-17 14:27:06,856 INFO L933 BasicCegarLoop]: 1624 mSDtfsCounter, 3106 mSDsluCounter, 3359 mSDsCounter, 0 mSdLazyCounter, 4851 mSolverCounterSat, 857 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3223 SdHoareTripleChecker+Valid, 4983 SdHoareTripleChecker+Invalid, 5708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 857 IncrementalHoareTripleChecker+Valid, 4851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-17 14:27:06,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3223 Valid, 4983 Invalid, 5708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [857 Valid, 4851 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-17 14:27:06,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2021-12-17 14:27:06,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 1294. [2021-12-17 14:27:06,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1024 states have (on average 1.63671875) internal successors, (1676), 1071 states have internal predecessors, (1676), 214 states have call successors, (214), 42 states have call predecessors, (214), 55 states have return successors, (247), 211 states have call predecessors, (247), 209 states have call successors, (247) [2021-12-17 14:27:06,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 2137 transitions. [2021-12-17 14:27:06,904 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 2137 transitions. Word has length 117 [2021-12-17 14:27:06,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:27:06,904 INFO L470 AbstractCegarLoop]: Abstraction has 1294 states and 2137 transitions. [2021-12-17 14:27:06,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-17 14:27:06,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 2137 transitions. [2021-12-17 14:27:06,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-17 14:27:06,909 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:27:06,910 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:27:06,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-17 14:27:07,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:27:07,123 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:27:07,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:27:07,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1318929787, now seen corresponding path program 1 times [2021-12-17 14:27:07,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:27:07,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123685109] [2021-12-17 14:27:07,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:27:07,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:27:07,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:07,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:27:07,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:07,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:07,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:07,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:27:07,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:07,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 14:27:07,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:07,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:07,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:07,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:27:07,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:07,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 14:27:07,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:07,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:07,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:07,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:07,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:07,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 14:27:07,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:07,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 14:27:07,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:07,444 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 14:27:07,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:27:07,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123685109] [2021-12-17 14:27:07,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123685109] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:27:07,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010819603] [2021-12-17 14:27:07,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:27:07,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:27:07,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:27:07,448 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:27:07,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-17 14:27:07,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:07,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 1792 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 14:27:07,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:27:07,859 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 14:27:07,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:27:07,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010819603] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:27:07,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:27:07,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-12-17 14:27:07,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964020729] [2021-12-17 14:27:07,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:27:07,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 14:27:07,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:27:07,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 14:27:07,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:27:07,861 INFO L87 Difference]: Start difference. First operand 1294 states and 2137 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 14:27:08,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:27:08,172 INFO L93 Difference]: Finished difference Result 3197 states and 5413 transitions. [2021-12-17 14:27:08,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 14:27:08,174 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 118 [2021-12-17 14:27:08,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:27:08,186 INFO L225 Difference]: With dead ends: 3197 [2021-12-17 14:27:08,186 INFO L226 Difference]: Without dead ends: 2222 [2021-12-17 14:27:08,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-12-17 14:27:08,193 INFO L933 BasicCegarLoop]: 1311 mSDtfsCounter, 699 mSDsluCounter, 3287 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 4598 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 14:27:08,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [712 Valid, 4598 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 14:27:08,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2021-12-17 14:27:08,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 2203. [2021-12-17 14:27:08,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2203 states, 1715 states have (on average 1.643731778425656) internal successors, (2819), 1796 states have internal predecessors, (2819), 393 states have call successors, (393), 76 states have call predecessors, (393), 94 states have return successors, (464), 392 states have call predecessors, (464), 388 states have call successors, (464) [2021-12-17 14:27:08,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2203 states to 2203 states and 3676 transitions. [2021-12-17 14:27:08,265 INFO L78 Accepts]: Start accepts. Automaton has 2203 states and 3676 transitions. Word has length 118 [2021-12-17 14:27:08,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:27:08,266 INFO L470 AbstractCegarLoop]: Abstraction has 2203 states and 3676 transitions. [2021-12-17 14:27:08,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 14:27:08,266 INFO L276 IsEmpty]: Start isEmpty. Operand 2203 states and 3676 transitions. [2021-12-17 14:27:08,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-17 14:27:08,274 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:27:08,275 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:27:08,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-17 14:27:08,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:27:08,491 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:27:08,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:27:08,492 INFO L85 PathProgramCache]: Analyzing trace with hash -777924206, now seen corresponding path program 1 times [2021-12-17 14:27:08,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:27:08,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188503798] [2021-12-17 14:27:08,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:27:08,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:27:08,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:08,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:27:08,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:08,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:08,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:08,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:27:08,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:08,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 14:27:08,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:08,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:08,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:08,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:27:08,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:08,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-17 14:27:08,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:08,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:08,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:08,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:08,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:08,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:27:08,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:08,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 14:27:08,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:08,861 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-17 14:27:08,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:27:08,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188503798] [2021-12-17 14:27:08,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188503798] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:27:08,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213911350] [2021-12-17 14:27:08,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:27:08,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:27:08,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:27:08,863 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:27:08,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-17 14:27:09,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:09,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 1792 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 14:27:09,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:27:09,279 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 14:27:09,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:27:09,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213911350] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:27:09,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:27:09,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 15 [2021-12-17 14:27:09,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706335511] [2021-12-17 14:27:09,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:27:09,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:27:09,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:27:09,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:27:09,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-12-17 14:27:09,284 INFO L87 Difference]: Start difference. First operand 2203 states and 3676 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:27:09,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:27:09,367 INFO L93 Difference]: Finished difference Result 4262 states and 7149 transitions. [2021-12-17 14:27:09,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 14:27:09,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 120 [2021-12-17 14:27:09,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:27:09,380 INFO L225 Difference]: With dead ends: 4262 [2021-12-17 14:27:09,380 INFO L226 Difference]: Without dead ends: 2257 [2021-12-17 14:27:09,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-12-17 14:27:09,390 INFO L933 BasicCegarLoop]: 833 mSDtfsCounter, 39 mSDsluCounter, 1661 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 2494 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:27:09,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 2494 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:27:09,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-12-17 14:27:09,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2224. [2021-12-17 14:27:09,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 1735 states have (on average 1.6432276657060518) internal successors, (2851), 1817 states have internal predecessors, (2851), 393 states have call successors, (393), 76 states have call predecessors, (393), 95 states have return successors, (465), 392 states have call predecessors, (465), 388 states have call successors, (465) [2021-12-17 14:27:09,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 3709 transitions. [2021-12-17 14:27:09,456 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 3709 transitions. Word has length 120 [2021-12-17 14:27:09,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:27:09,457 INFO L470 AbstractCegarLoop]: Abstraction has 2224 states and 3709 transitions. [2021-12-17 14:27:09,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-17 14:27:09,457 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 3709 transitions. [2021-12-17 14:27:09,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-17 14:27:09,465 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:27:09,465 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:27:09,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-17 14:27:09,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:27:09,679 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:27:09,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:27:09,680 INFO L85 PathProgramCache]: Analyzing trace with hash -791330583, now seen corresponding path program 1 times [2021-12-17 14:27:09,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:27:09,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218359546] [2021-12-17 14:27:09,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:27:09,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:27:09,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:09,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:27:09,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:09,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:09,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:09,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:27:09,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:09,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 14:27:09,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:09,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:09,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:09,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:27:09,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:10,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 14:27:10,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:10,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:10,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:10,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:10,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:10,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:27:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:10,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 14:27:10,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:10,089 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 14:27:10,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:27:10,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218359546] [2021-12-17 14:27:10,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218359546] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:27:10,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063154129] [2021-12-17 14:27:10,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:27:10,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:27:10,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:27:10,092 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:27:10,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-17 14:27:10,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:10,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 1790 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 14:27:10,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:27:10,534 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 14:27:10,534 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:27:10,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063154129] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:27:10,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:27:10,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [15] total 21 [2021-12-17 14:27:10,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291120162] [2021-12-17 14:27:10,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:27:10,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 14:27:10,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:27:10,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 14:27:10,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-12-17 14:27:10,535 INFO L87 Difference]: Start difference. First operand 2224 states and 3709 transitions. Second operand has 8 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 14:27:10,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:27:10,676 INFO L93 Difference]: Finished difference Result 4192 states and 7029 transitions. [2021-12-17 14:27:10,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 14:27:10,678 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 121 [2021-12-17 14:27:10,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:27:10,691 INFO L225 Difference]: With dead ends: 4192 [2021-12-17 14:27:10,691 INFO L226 Difference]: Without dead ends: 2297 [2021-12-17 14:27:10,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-12-17 14:27:10,700 INFO L933 BasicCegarLoop]: 830 mSDtfsCounter, 175 mSDsluCounter, 4880 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 5710 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:27:10,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 5710 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:27:10,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2021-12-17 14:27:10,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 2224. [2021-12-17 14:27:10,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 1735 states have (on average 1.6426512968299711) internal successors, (2850), 1817 states have internal predecessors, (2850), 393 states have call successors, (393), 76 states have call predecessors, (393), 95 states have return successors, (465), 392 states have call predecessors, (465), 388 states have call successors, (465) [2021-12-17 14:27:10,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 3708 transitions. [2021-12-17 14:27:10,822 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 3708 transitions. Word has length 121 [2021-12-17 14:27:10,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:27:10,822 INFO L470 AbstractCegarLoop]: Abstraction has 2224 states and 3708 transitions. [2021-12-17 14:27:10,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-17 14:27:10,823 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 3708 transitions. [2021-12-17 14:27:10,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-17 14:27:10,830 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:27:10,831 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:27:10,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-17 14:27:11,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:27:11,051 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:27:11,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:27:11,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1370093547, now seen corresponding path program 1 times [2021-12-17 14:27:11,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:27:11,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412451622] [2021-12-17 14:27:11,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:27:11,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:27:11,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:11,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:27:11,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:11,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:11,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:11,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:27:11,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:11,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 14:27:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:11,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:11,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:11,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:27:11,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:11,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 14:27:11,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:11,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:11,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:11,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:11,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:11,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:27:11,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:11,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 14:27:11,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:11,443 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 14:27:11,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:27:11,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412451622] [2021-12-17 14:27:11,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412451622] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:27:11,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385143666] [2021-12-17 14:27:11,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:27:11,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:27:11,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:27:11,444 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:27:11,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-17 14:27:11,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:11,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 1793 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 14:27:11,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:27:11,908 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-17 14:27:11,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:27:11,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385143666] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:27:11,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:27:11,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [15] total 18 [2021-12-17 14:27:11,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080253804] [2021-12-17 14:27:11,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:27:11,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 14:27:11,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:27:11,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 14:27:11,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-12-17 14:27:11,909 INFO L87 Difference]: Start difference. First operand 2224 states and 3708 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-17 14:27:12,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:27:12,191 INFO L93 Difference]: Finished difference Result 2437 states and 4062 transitions. [2021-12-17 14:27:12,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 14:27:12,191 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 121 [2021-12-17 14:27:12,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:27:12,202 INFO L225 Difference]: With dead ends: 2437 [2021-12-17 14:27:12,202 INFO L226 Difference]: Without dead ends: 2420 [2021-12-17 14:27:12,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-12-17 14:27:12,204 INFO L933 BasicCegarLoop]: 850 mSDtfsCounter, 873 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 1524 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 14:27:12,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [881 Valid, 1524 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 14:27:12,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2420 states. [2021-12-17 14:27:12,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2420 to 2242. [2021-12-17 14:27:12,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 1753 states have (on average 1.6360524814603536) internal successors, (2868), 1835 states have internal predecessors, (2868), 393 states have call successors, (393), 76 states have call predecessors, (393), 95 states have return successors, (465), 392 states have call predecessors, (465), 388 states have call successors, (465) [2021-12-17 14:27:12,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 3726 transitions. [2021-12-17 14:27:12,275 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 3726 transitions. Word has length 121 [2021-12-17 14:27:12,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:27:12,276 INFO L470 AbstractCegarLoop]: Abstraction has 2242 states and 3726 transitions. [2021-12-17 14:27:12,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-17 14:27:12,276 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 3726 transitions. [2021-12-17 14:27:12,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-17 14:27:12,283 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:27:12,283 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:27:12,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-17 14:27:12,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:27:12,503 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:27:12,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:27:12,504 INFO L85 PathProgramCache]: Analyzing trace with hash -798145562, now seen corresponding path program 1 times [2021-12-17 14:27:12,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:27:12,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435297945] [2021-12-17 14:27:12,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:27:12,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:27:12,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:12,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:27:12,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:12,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:12,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:12,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:27:12,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:12,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 14:27:12,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:12,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:12,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:12,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:27:12,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:12,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 14:27:12,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:12,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:12,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:12,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:12,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:12,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:27:12,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:12,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 14:27:12,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:12,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 14:27:12,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:12,890 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 14:27:12,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:27:12,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435297945] [2021-12-17 14:27:12,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435297945] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:27:12,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476327784] [2021-12-17 14:27:12,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:27:12,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:27:12,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:27:12,895 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:27:12,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-17 14:27:13,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:13,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 1809 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 14:27:13,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:27:13,378 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-17 14:27:13,378 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:27:13,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476327784] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:27:13,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:27:13,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15] total 18 [2021-12-17 14:27:13,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496519043] [2021-12-17 14:27:13,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:27:13,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 14:27:13,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:27:13,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 14:27:13,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-12-17 14:27:13,381 INFO L87 Difference]: Start difference. First operand 2242 states and 3726 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-17 14:27:13,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:27:13,439 INFO L93 Difference]: Finished difference Result 2271 states and 3764 transitions. [2021-12-17 14:27:13,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 14:27:13,440 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) Word has length 127 [2021-12-17 14:27:13,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:27:13,454 INFO L225 Difference]: With dead ends: 2271 [2021-12-17 14:27:13,454 INFO L226 Difference]: Without dead ends: 2254 [2021-12-17 14:27:13,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-17 14:27:13,456 INFO L933 BasicCegarLoop]: 855 mSDtfsCounter, 37 mSDsluCounter, 2517 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3372 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:27:13,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 3372 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:27:13,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-12-17 14:27:13,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 2242. [2021-12-17 14:27:13,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 1753 states have (on average 1.6326297775242442) internal successors, (2862), 1835 states have internal predecessors, (2862), 393 states have call successors, (393), 76 states have call predecessors, (393), 95 states have return successors, (465), 392 states have call predecessors, (465), 388 states have call successors, (465) [2021-12-17 14:27:13,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 3720 transitions. [2021-12-17 14:27:13,543 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 3720 transitions. Word has length 127 [2021-12-17 14:27:13,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:27:13,544 INFO L470 AbstractCegarLoop]: Abstraction has 2242 states and 3720 transitions. [2021-12-17 14:27:13,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-17 14:27:13,544 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 3720 transitions. [2021-12-17 14:27:13,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-17 14:27:13,553 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:27:13,553 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:27:13,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-17 14:27:13,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:27:13,771 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:27:13,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:27:13,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1519715146, now seen corresponding path program 1 times [2021-12-17 14:27:13,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:27:13,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626213766] [2021-12-17 14:27:13,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:27:13,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:27:13,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:13,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:27:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:13,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:13,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:13,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:27:13,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:13,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 14:27:13,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:13,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:13,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:13,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:27:13,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:14,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 14:27:14,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:14,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:14,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:14,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:14,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:14,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:27:14,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:14,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 14:27:14,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:14,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 14:27:14,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:14,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 14:27:14,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:14,200 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-17 14:27:14,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:27:14,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626213766] [2021-12-17 14:27:14,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626213766] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:27:14,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652553776] [2021-12-17 14:27:14,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:27:14,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:27:14,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:27:14,202 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:27:14,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-17 14:27:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:14,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 1846 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-17 14:27:14,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:27:14,608 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 14:27:14,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:27:14,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652553776] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:27:14,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:27:14,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [15] total 17 [2021-12-17 14:27:14,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347480258] [2021-12-17 14:27:14,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:27:14,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 14:27:14,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:27:14,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 14:27:14,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-12-17 14:27:14,609 INFO L87 Difference]: Start difference. First operand 2242 states and 3720 transitions. Second operand has 7 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-17 14:27:14,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:27:14,718 INFO L93 Difference]: Finished difference Result 4342 states and 7231 transitions. [2021-12-17 14:27:14,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 14:27:14,719 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 138 [2021-12-17 14:27:14,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:27:14,731 INFO L225 Difference]: With dead ends: 4342 [2021-12-17 14:27:14,731 INFO L226 Difference]: Without dead ends: 2325 [2021-12-17 14:27:14,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-12-17 14:27:14,741 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 167 mSDsluCounter, 4076 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 4916 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:27:14,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 4916 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:27:14,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2325 states. [2021-12-17 14:27:14,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2325 to 2242. [2021-12-17 14:27:14,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 1753 states have (on average 1.6326297775242442) internal successors, (2862), 1835 states have internal predecessors, (2862), 393 states have call successors, (393), 76 states have call predecessors, (393), 95 states have return successors, (465), 392 states have call predecessors, (465), 388 states have call successors, (465) [2021-12-17 14:27:14,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 3720 transitions. [2021-12-17 14:27:14,803 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 3720 transitions. Word has length 138 [2021-12-17 14:27:14,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:27:14,804 INFO L470 AbstractCegarLoop]: Abstraction has 2242 states and 3720 transitions. [2021-12-17 14:27:14,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-17 14:27:14,804 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 3720 transitions. [2021-12-17 14:27:14,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-17 14:27:14,812 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:27:14,812 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:27:14,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-17 14:27:15,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-17 14:27:15,027 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:27:15,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:27:15,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1823731078, now seen corresponding path program 1 times [2021-12-17 14:27:15,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:27:15,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421536359] [2021-12-17 14:27:15,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:27:15,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:27:15,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:15,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:27:15,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:15,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:15,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:15,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:27:15,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:15,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 14:27:15,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:15,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:15,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:15,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:27:15,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:15,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 14:27:15,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:15,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:15,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:15,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:15,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:15,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 14:27:15,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:15,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 14:27:15,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:15,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 14:27:15,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:15,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-17 14:27:15,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:15,360 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 14:27:15,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:27:15,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421536359] [2021-12-17 14:27:15,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421536359] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:27:15,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323215564] [2021-12-17 14:27:15,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:27:15,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:27:15,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:27:15,362 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:27:15,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-17 14:27:15,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:15,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 1847 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 14:27:15,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:27:15,864 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 14:27:15,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:27:15,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323215564] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:27:15,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:27:15,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-17 14:27:15,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256054866] [2021-12-17 14:27:15,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:27:15,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:27:15,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:27:15,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:27:15,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:27:15,866 INFO L87 Difference]: Start difference. First operand 2242 states and 3720 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-17 14:27:15,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:27:15,950 INFO L93 Difference]: Finished difference Result 4346 states and 7242 transitions. [2021-12-17 14:27:15,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 14:27:15,951 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 138 [2021-12-17 14:27:15,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:27:15,959 INFO L225 Difference]: With dead ends: 4346 [2021-12-17 14:27:15,959 INFO L226 Difference]: Without dead ends: 2072 [2021-12-17 14:27:15,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:27:15,964 INFO L933 BasicCegarLoop]: 843 mSDtfsCounter, 11 mSDsluCounter, 1677 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 2520 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:27:15,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 2520 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:27:15,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-12-17 14:27:16,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 2072. [2021-12-17 14:27:16,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 1598 states have (on average 1.6376720901126407) internal successors, (2617), 1674 states have internal predecessors, (2617), 388 states have call successors, (388), 73 states have call predecessors, (388), 85 states have return successors, (451), 386 states have call predecessors, (451), 383 states have call successors, (451) [2021-12-17 14:27:16,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 3456 transitions. [2021-12-17 14:27:16,028 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 3456 transitions. Word has length 138 [2021-12-17 14:27:16,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:27:16,029 INFO L470 AbstractCegarLoop]: Abstraction has 2072 states and 3456 transitions. [2021-12-17 14:27:16,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-17 14:27:16,029 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 3456 transitions. [2021-12-17 14:27:16,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-17 14:27:16,036 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:27:16,037 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:27:16,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-17 14:27:16,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-17 14:27:16,260 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:27:16,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:27:16,260 INFO L85 PathProgramCache]: Analyzing trace with hash 641853903, now seen corresponding path program 1 times [2021-12-17 14:27:16,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:27:16,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117881265] [2021-12-17 14:27:16,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:27:16,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:27:16,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:16,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:27:16,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:16,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:16,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:16,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:27:16,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:16,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 14:27:16,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:16,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:16,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:27:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:16,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-17 14:27:16,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:16,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:16,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:16,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:16,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:16,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:27:16,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:16,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 14:27:16,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:16,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 14:27:16,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:16,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 14:27:16,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:16,591 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 14:27:16,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:27:16,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117881265] [2021-12-17 14:27:16,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117881265] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:27:16,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954510772] [2021-12-17 14:27:16,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:27:16,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:27:16,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:27:16,593 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:27:16,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-17 14:27:16,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:16,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 1851 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 14:27:16,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:27:17,015 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 14:27:17,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:27:17,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954510772] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:27:17,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:27:17,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-17 14:27:17,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839037493] [2021-12-17 14:27:17,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:27:17,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:27:17,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:27:17,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:27:17,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:27:17,016 INFO L87 Difference]: Start difference. First operand 2072 states and 3456 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-17 14:27:17,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:27:17,115 INFO L93 Difference]: Finished difference Result 4113 states and 6877 transitions. [2021-12-17 14:27:17,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 14:27:17,116 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 139 [2021-12-17 14:27:17,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:27:17,126 INFO L225 Difference]: With dead ends: 4113 [2021-12-17 14:27:17,127 INFO L226 Difference]: Without dead ends: 2072 [2021-12-17 14:27:17,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:27:17,164 INFO L933 BasicCegarLoop]: 802 mSDtfsCounter, 177 mSDsluCounter, 1551 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 2353 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:27:17,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 2353 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:27:17,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-12-17 14:27:17,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 2072. [2021-12-17 14:27:17,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 1598 states have (on average 1.637046307884856) internal successors, (2616), 1674 states have internal predecessors, (2616), 388 states have call successors, (388), 73 states have call predecessors, (388), 85 states have return successors, (451), 386 states have call predecessors, (451), 383 states have call successors, (451) [2021-12-17 14:27:17,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 3455 transitions. [2021-12-17 14:27:17,219 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 3455 transitions. Word has length 139 [2021-12-17 14:27:17,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:27:17,219 INFO L470 AbstractCegarLoop]: Abstraction has 2072 states and 3455 transitions. [2021-12-17 14:27:17,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-17 14:27:17,220 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 3455 transitions. [2021-12-17 14:27:17,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-17 14:27:17,229 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:27:17,230 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:27:17,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-17 14:27:17,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-17 14:27:17,443 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:27:17,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:27:17,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1043081883, now seen corresponding path program 1 times [2021-12-17 14:27:17,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:27:17,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912746518] [2021-12-17 14:27:17,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:27:17,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:27:17,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:17,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:27:17,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:17,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:17,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:17,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:27:17,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:17,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 14:27:17,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:17,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:17,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:17,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:27:17,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:17,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-17 14:27:17,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:17,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:17,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:17,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:17,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:17,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:27:17,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:17,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 14:27:17,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:17,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 14:27:17,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:17,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 14:27:17,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:17,744 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 14:27:17,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:27:17,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912746518] [2021-12-17 14:27:17,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912746518] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:27:17,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821164792] [2021-12-17 14:27:17,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:27:17,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:27:17,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:27:17,748 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:27:17,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-17 14:27:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:18,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 1852 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 14:27:18,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:27:18,211 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 14:27:18,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:27:18,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821164792] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:27:18,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:27:18,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-17 14:27:18,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277228092] [2021-12-17 14:27:18,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:27:18,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:27:18,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:27:18,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:27:18,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:27:18,213 INFO L87 Difference]: Start difference. First operand 2072 states and 3455 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-17 14:27:18,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:27:18,315 INFO L93 Difference]: Finished difference Result 4113 states and 6876 transitions. [2021-12-17 14:27:18,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 14:27:18,316 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 140 [2021-12-17 14:27:18,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:27:18,325 INFO L225 Difference]: With dead ends: 4113 [2021-12-17 14:27:18,326 INFO L226 Difference]: Without dead ends: 2072 [2021-12-17 14:27:18,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:27:18,332 INFO L933 BasicCegarLoop]: 802 mSDtfsCounter, 176 mSDsluCounter, 1551 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 2353 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:27:18,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 2353 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:27:18,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-12-17 14:27:18,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 2072. [2021-12-17 14:27:18,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 1598 states have (on average 1.6364205256570714) internal successors, (2615), 1674 states have internal predecessors, (2615), 388 states have call successors, (388), 73 states have call predecessors, (388), 85 states have return successors, (451), 386 states have call predecessors, (451), 383 states have call successors, (451) [2021-12-17 14:27:18,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 3454 transitions. [2021-12-17 14:27:18,407 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 3454 transitions. Word has length 140 [2021-12-17 14:27:18,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:27:18,407 INFO L470 AbstractCegarLoop]: Abstraction has 2072 states and 3454 transitions. [2021-12-17 14:27:18,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-17 14:27:18,408 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 3454 transitions. [2021-12-17 14:27:18,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-17 14:27:18,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:27:18,413 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:27:18,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-17 14:27:18,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-17 14:27:18,631 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:27:18,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:27:18,632 INFO L85 PathProgramCache]: Analyzing trace with hash -874555626, now seen corresponding path program 1 times [2021-12-17 14:27:18,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:27:18,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117576289] [2021-12-17 14:27:18,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:27:18,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:27:18,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:18,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:27:18,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:18,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:18,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:18,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:27:18,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:18,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 14:27:18,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:18,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:18,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:27:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:18,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-17 14:27:18,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:18,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:18,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:18,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:18,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:27:18,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:18,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 14:27:18,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:18,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 14:27:18,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:18,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 14:27:18,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:18,972 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 14:27:18,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:27:18,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117576289] [2021-12-17 14:27:18,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117576289] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:27:18,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069372955] [2021-12-17 14:27:18,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:27:18,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:27:18,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:27:18,974 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:27:18,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-17 14:27:19,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:19,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 1850 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 14:27:19,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:27:19,367 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 14:27:19,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:27:19,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069372955] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:27:19,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:27:19,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-12-17 14:27:19,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259188831] [2021-12-17 14:27:19,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:27:19,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:27:19,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:27:19,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:27:19,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 14:27:19,372 INFO L87 Difference]: Start difference. First operand 2072 states and 3454 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-17 14:27:19,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:27:19,460 INFO L93 Difference]: Finished difference Result 4113 states and 6881 transitions. [2021-12-17 14:27:19,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 14:27:19,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 141 [2021-12-17 14:27:19,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:27:19,469 INFO L225 Difference]: With dead ends: 4113 [2021-12-17 14:27:19,469 INFO L226 Difference]: Without dead ends: 2072 [2021-12-17 14:27:19,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 14:27:19,474 INFO L933 BasicCegarLoop]: 802 mSDtfsCounter, 166 mSDsluCounter, 1551 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 2353 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:27:19,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 2353 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:27:19,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-12-17 14:27:19,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 2072. [2021-12-17 14:27:19,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 1598 states have (on average 1.6326658322903629) internal successors, (2609), 1674 states have internal predecessors, (2609), 388 states have call successors, (388), 73 states have call predecessors, (388), 85 states have return successors, (451), 386 states have call predecessors, (451), 383 states have call successors, (451) [2021-12-17 14:27:19,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 3448 transitions. [2021-12-17 14:27:19,557 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 3448 transitions. Word has length 141 [2021-12-17 14:27:19,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:27:19,558 INFO L470 AbstractCegarLoop]: Abstraction has 2072 states and 3448 transitions. [2021-12-17 14:27:19,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-17 14:27:19,558 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 3448 transitions. [2021-12-17 14:27:19,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-17 14:27:19,563 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:27:19,564 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:27:19,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-17 14:27:19,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-17 14:27:19,780 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:27:19,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:27:19,780 INFO L85 PathProgramCache]: Analyzing trace with hash 772807316, now seen corresponding path program 1 times [2021-12-17 14:27:19,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:27:19,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243683060] [2021-12-17 14:27:19,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:27:19,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:27:19,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:19,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:27:19,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:19,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:19,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:19,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:27:19,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:19,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 14:27:19,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:19,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:19,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:19,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:27:19,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:20,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-17 14:27:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:20,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:20,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:20,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:20,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:20,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:27:20,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:20,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 14:27:20,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:20,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 14:27:20,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:20,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 14:27:20,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:20,171 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 14:27:20,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:27:20,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243683060] [2021-12-17 14:27:20,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243683060] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:27:20,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:27:20,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-17 14:27:20,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881297584] [2021-12-17 14:27:20,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:27:20,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 14:27:20,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:27:20,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 14:27:20,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-17 14:27:20,173 INFO L87 Difference]: Start difference. First operand 2072 states and 3448 transitions. Second operand has 13 states, 12 states have (on average 8.833333333333334) internal successors, (106), 8 states have internal predecessors, (106), 3 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-17 14:27:27,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:27:27,048 INFO L93 Difference]: Finished difference Result 5417 states and 9446 transitions. [2021-12-17 14:27:27,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-17 14:27:27,048 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 8.833333333333334) internal successors, (106), 8 states have internal predecessors, (106), 3 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 141 [2021-12-17 14:27:27,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:27:27,063 INFO L225 Difference]: With dead ends: 5417 [2021-12-17 14:27:27,063 INFO L226 Difference]: Without dead ends: 3391 [2021-12-17 14:27:27,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-12-17 14:27:27,071 INFO L933 BasicCegarLoop]: 911 mSDtfsCounter, 1072 mSDsluCounter, 4655 mSDsCounter, 0 mSdLazyCounter, 7278 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1142 SdHoareTripleChecker+Valid, 5566 SdHoareTripleChecker+Invalid, 7584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 7278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:27:27,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1142 Valid, 5566 Invalid, 7584 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [306 Valid, 7278 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-12-17 14:27:27,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3391 states. [2021-12-17 14:27:27,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3391 to 2152. [2021-12-17 14:27:27,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 1662 states have (on average 1.6263537906137184) internal successors, (2703), 1738 states have internal predecessors, (2703), 398 states have call successors, (398), 73 states have call predecessors, (398), 91 states have return successors, (478), 400 states have call predecessors, (478), 393 states have call successors, (478) [2021-12-17 14:27:27,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 3579 transitions. [2021-12-17 14:27:27,271 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 3579 transitions. Word has length 141 [2021-12-17 14:27:27,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:27:27,271 INFO L470 AbstractCegarLoop]: Abstraction has 2152 states and 3579 transitions. [2021-12-17 14:27:27,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 8.833333333333334) internal successors, (106), 8 states have internal predecessors, (106), 3 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-17 14:27:27,272 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 3579 transitions. [2021-12-17 14:27:27,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-17 14:27:27,277 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:27:27,278 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:27:27,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-17 14:27:27,278 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:27:27,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:27:27,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1425603474, now seen corresponding path program 1 times [2021-12-17 14:27:27,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:27:27,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163802232] [2021-12-17 14:27:27,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:27:27,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:27:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:27,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:27:27,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:27,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:27,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:27:27,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:27,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 14:27:27,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:27,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:27,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:27,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:27:27,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:27,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-17 14:27:27,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:27,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:27,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:27,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:27,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:27,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 14:27:27,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:27,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 14:27:27,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:27,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 14:27:27,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:27,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 14:27:27,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:27,598 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 14:27:27,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:27:27,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163802232] [2021-12-17 14:27:27,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163802232] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:27:27,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:27:27,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 14:27:27,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687652336] [2021-12-17 14:27:27,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:27:27,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 14:27:27,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:27:27,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 14:27:27,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 14:27:27,602 INFO L87 Difference]: Start difference. First operand 2152 states and 3579 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-17 14:27:31,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:27:31,626 INFO L93 Difference]: Finished difference Result 3624 states and 6111 transitions. [2021-12-17 14:27:31,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 14:27:31,626 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 145 [2021-12-17 14:27:31,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:27:31,633 INFO L225 Difference]: With dead ends: 3624 [2021-12-17 14:27:31,633 INFO L226 Difference]: Without dead ends: 1486 [2021-12-17 14:27:31,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-12-17 14:27:31,638 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 886 mSDsluCounter, 1424 mSDsCounter, 0 mSdLazyCounter, 2555 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 2312 SdHoareTripleChecker+Invalid, 2808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 2555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-17 14:27:31,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [957 Valid, 2312 Invalid, 2808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 2555 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-17 14:27:31,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2021-12-17 14:27:31,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 991. [2021-12-17 14:27:31,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 785 states have (on average 1.6191082802547772) internal successors, (1271), 818 states have internal predecessors, (1271), 163 states have call successors, (163), 40 states have call predecessors, (163), 42 states have return successors, (175), 157 states have call predecessors, (175), 158 states have call successors, (175) [2021-12-17 14:27:31,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1609 transitions. [2021-12-17 14:27:31,733 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1609 transitions. Word has length 145 [2021-12-17 14:27:31,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:27:31,733 INFO L470 AbstractCegarLoop]: Abstraction has 991 states and 1609 transitions. [2021-12-17 14:27:31,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-17 14:27:31,734 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1609 transitions. [2021-12-17 14:27:31,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-17 14:27:31,736 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:27:31,737 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:27:31,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-17 14:27:31,737 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:27:31,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:27:31,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1986822718, now seen corresponding path program 1 times [2021-12-17 14:27:31,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:27:31,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503880789] [2021-12-17 14:27:31,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:27:31,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:27:31,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:31,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:27:31,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:31,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:31,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:27:31,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:31,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 14:27:31,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:31,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:31,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:31,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:27:31,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:31,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 14:27:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:32,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:32,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:32,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:32,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:32,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:27:32,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:32,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 14:27:32,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:32,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 14:27:32,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:32,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-17 14:27:32,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:32,060 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-17 14:27:32,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:27:32,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503880789] [2021-12-17 14:27:32,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503880789] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:27:32,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279679889] [2021-12-17 14:27:32,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:27:32,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:27:32,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:27:32,062 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:27:32,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-17 14:27:32,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:32,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 1858 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 14:27:32,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:27:32,484 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 14:27:32,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:27:32,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279679889] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:27:32,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:27:32,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 10 [2021-12-17 14:27:32,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124949560] [2021-12-17 14:27:32,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:27:32,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 14:27:32,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:27:32,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 14:27:32,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:27:32,486 INFO L87 Difference]: Start difference. First operand 991 states and 1609 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-17 14:27:32,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:27:32,661 INFO L93 Difference]: Finished difference Result 2607 states and 4327 transitions. [2021-12-17 14:27:32,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 14:27:32,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 146 [2021-12-17 14:27:32,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:27:32,669 INFO L225 Difference]: With dead ends: 2607 [2021-12-17 14:27:32,669 INFO L226 Difference]: Without dead ends: 1733 [2021-12-17 14:27:32,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:27:32,673 INFO L933 BasicCegarLoop]: 978 mSDtfsCounter, 760 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:27:32,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [760 Valid, 1626 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:27:32,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1733 states. [2021-12-17 14:27:32,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1733 to 1718. [2021-12-17 14:27:32,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1345 states have (on average 1.620817843866171) internal successors, (2180), 1403 states have internal predecessors, (2180), 298 states have call successors, (298), 72 states have call predecessors, (298), 74 states have return successors, (331), 291 states have call predecessors, (331), 293 states have call successors, (331) [2021-12-17 14:27:32,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 2809 transitions. [2021-12-17 14:27:32,814 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 2809 transitions. Word has length 146 [2021-12-17 14:27:32,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:27:32,815 INFO L470 AbstractCegarLoop]: Abstraction has 1718 states and 2809 transitions. [2021-12-17 14:27:32,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-17 14:27:32,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 2809 transitions. [2021-12-17 14:27:32,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-17 14:27:32,817 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:27:32,817 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:27:32,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-17 14:27:33,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-17 14:27:33,040 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:27:33,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:27:33,040 INFO L85 PathProgramCache]: Analyzing trace with hash 2123355544, now seen corresponding path program 1 times [2021-12-17 14:27:33,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:27:33,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766049370] [2021-12-17 14:27:33,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:27:33,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:27:33,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:33,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:27:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:33,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:33,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:33,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:27:33,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:33,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 14:27:33,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:33,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:33,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:33,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:27:33,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:33,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 14:27:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:33,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:33,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:33,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:33,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:27:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:33,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:27:33,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:33,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 14:27:33,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:33,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 14:27:33,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:33,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-17 14:27:33,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:33,446 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-17 14:27:33,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:27:33,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766049370] [2021-12-17 14:27:33,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766049370] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:27:33,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170511421] [2021-12-17 14:27:33,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:27:33,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:27:33,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:27:33,449 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:27:33,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-17 14:27:33,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:33,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 1880 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 14:27:33,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:27:33,972 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 14:27:33,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:27:33,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170511421] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:27:33,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:27:33,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 9 [2021-12-17 14:27:33,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863521538] [2021-12-17 14:27:33,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:27:33,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 14:27:33,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:27:33,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 14:27:33,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:27:33,974 INFO L87 Difference]: Start difference. First operand 1718 states and 2809 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-17 14:27:34,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:27:34,237 INFO L93 Difference]: Finished difference Result 4779 states and 7951 transitions. [2021-12-17 14:27:34,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 14:27:34,237 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 151 [2021-12-17 14:27:34,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:27:34,248 INFO L225 Difference]: With dead ends: 4779 [2021-12-17 14:27:34,248 INFO L226 Difference]: Without dead ends: 3191 [2021-12-17 14:27:34,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-17 14:27:34,253 INFO L933 BasicCegarLoop]: 857 mSDtfsCounter, 821 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 1472 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:27:34,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [821 Valid, 1472 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:27:34,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3191 states. [2021-12-17 14:27:34,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3191 to 3173. [2021-12-17 14:27:34,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3173 states, 2466 states have (on average 1.6346309813463098) internal successors, (4031), 2578 states have internal predecessors, (4031), 568 states have call successors, (568), 136 states have call predecessors, (568), 138 states have return successors, (656), 556 states have call predecessors, (656), 563 states have call successors, (656) [2021-12-17 14:27:34,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3173 states to 3173 states and 5255 transitions. [2021-12-17 14:27:34,545 INFO L78 Accepts]: Start accepts. Automaton has 3173 states and 5255 transitions. Word has length 151 [2021-12-17 14:27:34,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:27:34,545 INFO L470 AbstractCegarLoop]: Abstraction has 3173 states and 5255 transitions. [2021-12-17 14:27:34,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-17 14:27:34,546 INFO L276 IsEmpty]: Start isEmpty. Operand 3173 states and 5255 transitions. [2021-12-17 14:27:34,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-17 14:27:34,548 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:27:34,549 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:27:34,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-12-17 14:27:34,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:27:34,773 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:27:34,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:27:34,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1499051412, now seen corresponding path program 1 times [2021-12-17 14:27:34,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:27:34,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798618089] [2021-12-17 14:27:34,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:27:34,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:27:34,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:34,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:27:34,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:34,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:34,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:34,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:27:34,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:34,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 14:27:34,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:34,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:34,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:34,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:27:34,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:35,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 14:27:35,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:35,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:35,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:35,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:35,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:35,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:27:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:35,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:27:35,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:35,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-17 14:27:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:35,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 14:27:35,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:35,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 14:27:35,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:35,133 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-17 14:27:35,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:27:35,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798618089] [2021-12-17 14:27:35,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798618089] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:27:35,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:27:35,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 14:27:35,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449820084] [2021-12-17 14:27:35,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:27:35,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 14:27:35,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:27:35,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 14:27:35,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:27:35,135 INFO L87 Difference]: Start difference. First operand 3173 states and 5255 transitions. Second operand has 10 states, 10 states have (on average 11.0) internal successors, (110), 7 states have internal predecessors, (110), 3 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-17 14:27:39,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:27:39,801 INFO L93 Difference]: Finished difference Result 6946 states and 12181 transitions. [2021-12-17 14:27:39,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 14:27:39,801 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 7 states have internal predecessors, (110), 3 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 154 [2021-12-17 14:27:39,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:27:39,822 INFO L225 Difference]: With dead ends: 6946 [2021-12-17 14:27:39,822 INFO L226 Difference]: Without dead ends: 4400 [2021-12-17 14:27:39,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-12-17 14:27:39,833 INFO L933 BasicCegarLoop]: 837 mSDtfsCounter, 2191 mSDsluCounter, 2686 mSDsCounter, 0 mSdLazyCounter, 4516 mSolverCounterSat, 578 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2251 SdHoareTripleChecker+Valid, 3523 SdHoareTripleChecker+Invalid, 5094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 578 IncrementalHoareTripleChecker+Valid, 4516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-17 14:27:39,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2251 Valid, 3523 Invalid, 5094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [578 Valid, 4516 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-12-17 14:27:39,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4400 states. [2021-12-17 14:27:40,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4400 to 3233. [2021-12-17 14:27:40,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3233 states, 2514 states have (on average 1.6276849642004774) internal successors, (4092), 2626 states have internal predecessors, (4092), 578 states have call successors, (578), 136 states have call predecessors, (578), 140 states have return successors, (670), 566 states have call predecessors, (670), 573 states have call successors, (670) [2021-12-17 14:27:40,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3233 states to 3233 states and 5340 transitions. [2021-12-17 14:27:40,255 INFO L78 Accepts]: Start accepts. Automaton has 3233 states and 5340 transitions. Word has length 154 [2021-12-17 14:27:40,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:27:40,256 INFO L470 AbstractCegarLoop]: Abstraction has 3233 states and 5340 transitions. [2021-12-17 14:27:40,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 7 states have internal predecessors, (110), 3 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-17 14:27:40,256 INFO L276 IsEmpty]: Start isEmpty. Operand 3233 states and 5340 transitions. [2021-12-17 14:27:40,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-17 14:27:40,260 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:27:40,260 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:27:40,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-17 14:27:40,261 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:27:40,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:27:40,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1899588620, now seen corresponding path program 1 times [2021-12-17 14:27:40,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:27:40,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560841911] [2021-12-17 14:27:40,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:27:40,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:27:40,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:40,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:27:40,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:40,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:40,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:40,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:27:40,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:40,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 14:27:40,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:40,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:40,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:40,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:27:40,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:40,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 14:27:40,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:40,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:40,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:40,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:40,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:40,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:27:40,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:40,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 14:27:40,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:40,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 14:27:40,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:40,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 14:27:40,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:40,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 14:27:40,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:40,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-17 14:27:40,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:40,654 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-17 14:27:40,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:27:40,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560841911] [2021-12-17 14:27:40,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560841911] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:27:40,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:27:40,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-17 14:27:40,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431616673] [2021-12-17 14:27:40,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:27:40,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 14:27:40,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:27:40,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 14:27:40,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-17 14:27:40,656 INFO L87 Difference]: Start difference. First operand 3233 states and 5340 transitions. Second operand has 11 states, 10 states have (on average 11.0) internal successors, (110), 7 states have internal predecessors, (110), 4 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-12-17 14:27:51,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:27:51,217 INFO L93 Difference]: Finished difference Result 8657 states and 15472 transitions. [2021-12-17 14:27:51,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-17 14:27:51,218 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 11.0) internal successors, (110), 7 states have internal predecessors, (110), 4 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 156 [2021-12-17 14:27:51,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:27:51,248 INFO L225 Difference]: With dead ends: 8657 [2021-12-17 14:27:51,248 INFO L226 Difference]: Without dead ends: 6200 [2021-12-17 14:27:51,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-12-17 14:27:51,260 INFO L933 BasicCegarLoop]: 941 mSDtfsCounter, 2749 mSDsluCounter, 3554 mSDsCounter, 0 mSdLazyCounter, 6934 mSolverCounterSat, 986 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2809 SdHoareTripleChecker+Valid, 4495 SdHoareTripleChecker+Invalid, 7920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 986 IncrementalHoareTripleChecker+Valid, 6934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-12-17 14:27:51,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2809 Valid, 4495 Invalid, 7920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [986 Valid, 6934 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2021-12-17 14:27:51,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6200 states. [2021-12-17 14:27:51,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6200 to 4280. [2021-12-17 14:27:51,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4280 states, 3324 states have (on average 1.6161251504211793) internal successors, (5372), 3481 states have internal predecessors, (5372), 747 states have call successors, (747), 181 states have call predecessors, (747), 208 states have return successors, (951), 737 states have call predecessors, (951), 742 states have call successors, (951) [2021-12-17 14:27:51,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4280 states to 4280 states and 7070 transitions. [2021-12-17 14:27:51,732 INFO L78 Accepts]: Start accepts. Automaton has 4280 states and 7070 transitions. Word has length 156 [2021-12-17 14:27:51,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:27:51,733 INFO L470 AbstractCegarLoop]: Abstraction has 4280 states and 7070 transitions. [2021-12-17 14:27:51,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 11.0) internal successors, (110), 7 states have internal predecessors, (110), 4 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-12-17 14:27:51,733 INFO L276 IsEmpty]: Start isEmpty. Operand 4280 states and 7070 transitions. [2021-12-17 14:27:51,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-17 14:27:51,736 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:27:51,736 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:27:51,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-17 14:27:51,736 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:27:51,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:27:51,737 INFO L85 PathProgramCache]: Analyzing trace with hash -609607598, now seen corresponding path program 1 times [2021-12-17 14:27:51,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:27:51,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294579149] [2021-12-17 14:27:51,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:27:51,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:27:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:51,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:27:51,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:51,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:51,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:51,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:27:51,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:51,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 14:27:51,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:51,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:51,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:51,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:27:51,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:52,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 14:27:52,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:52,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:52,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:52,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:52,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:52,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:27:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:52,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:27:52,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:52,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:27:52,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:52,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-17 14:27:52,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:52,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-17 14:27:52,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:52,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-17 14:27:52,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:52,089 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 14:27:52,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:27:52,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294579149] [2021-12-17 14:27:52,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294579149] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:27:52,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677949204] [2021-12-17 14:27:52,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:27:52,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:27:52,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:27:52,092 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:27:52,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-17 14:27:52,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:52,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 1900 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 14:27:52,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:27:52,594 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-17 14:27:52,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:27:52,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677949204] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:27:52,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:27:52,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2021-12-17 14:27:52,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267955168] [2021-12-17 14:27:52,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:27:52,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:27:52,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:27:52,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:27:52,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-17 14:27:52,596 INFO L87 Difference]: Start difference. First operand 4280 states and 7070 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 14:27:52,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:27:52,966 INFO L93 Difference]: Finished difference Result 8492 states and 14266 transitions. [2021-12-17 14:27:52,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 14:27:52,971 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 158 [2021-12-17 14:27:52,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:27:52,986 INFO L225 Difference]: With dead ends: 8492 [2021-12-17 14:27:52,986 INFO L226 Difference]: Without dead ends: 4330 [2021-12-17 14:27:52,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-12-17 14:27:52,995 INFO L933 BasicCegarLoop]: 796 mSDtfsCounter, 22 mSDsluCounter, 1557 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2353 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:27:52,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 2353 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:27:52,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4330 states. [2021-12-17 14:27:53,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4330 to 4330. [2021-12-17 14:27:53,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4330 states, 3364 states have (on average 1.6055291319857312) internal successors, (5401), 3526 states have internal predecessors, (5401), 747 states have call successors, (747), 186 states have call predecessors, (747), 218 states have return successors, (961), 737 states have call predecessors, (961), 742 states have call successors, (961) [2021-12-17 14:27:53,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4330 states to 4330 states and 7109 transitions. [2021-12-17 14:27:53,421 INFO L78 Accepts]: Start accepts. Automaton has 4330 states and 7109 transitions. Word has length 158 [2021-12-17 14:27:53,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:27:53,421 INFO L470 AbstractCegarLoop]: Abstraction has 4330 states and 7109 transitions. [2021-12-17 14:27:53,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-17 14:27:53,422 INFO L276 IsEmpty]: Start isEmpty. Operand 4330 states and 7109 transitions. [2021-12-17 14:27:53,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-17 14:27:53,425 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:27:53,425 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:27:53,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-12-17 14:27:53,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:27:53,647 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:27:53,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:27:53,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1909879435, now seen corresponding path program 1 times [2021-12-17 14:27:53,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:27:53,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123708132] [2021-12-17 14:27:53,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:27:53,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:27:53,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:53,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:27:53,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:53,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:53,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:53,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:27:53,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:53,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 14:27:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:53,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:53,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:27:53,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:53,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 14:27:53,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:54,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:54,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:27:54,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:54,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:27:54,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:54,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:27:54,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:54,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:27:54,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:54,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 14:27:54,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:54,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-17 14:27:54,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:54,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 14:27:54,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:27:54,074 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 14:27:54,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:27:54,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123708132] [2021-12-17 14:27:54,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123708132] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:27:54,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:27:54,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 14:27:54,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926679670] [2021-12-17 14:27:54,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:27:54,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 14:27:54,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:27:54,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 14:27:54,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:27:54,077 INFO L87 Difference]: Start difference. First operand 4330 states and 7109 transitions. Second operand has 10 states, 10 states have (on average 11.1) internal successors, (111), 7 states have internal predecessors, (111), 4 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-12-17 14:28:04,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:28:04,119 INFO L93 Difference]: Finished difference Result 9867 states and 17012 transitions. [2021-12-17 14:28:04,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-17 14:28:04,120 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.1) internal successors, (111), 7 states have internal predecessors, (111), 4 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 159 [2021-12-17 14:28:04,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:28:04,149 INFO L225 Difference]: With dead ends: 9867 [2021-12-17 14:28:04,149 INFO L226 Difference]: Without dead ends: 6317 [2021-12-17 14:28:04,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2021-12-17 14:28:04,163 INFO L933 BasicCegarLoop]: 867 mSDtfsCounter, 2679 mSDsluCounter, 2526 mSDsCounter, 0 mSdLazyCounter, 5901 mSolverCounterSat, 917 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2737 SdHoareTripleChecker+Valid, 3393 SdHoareTripleChecker+Invalid, 6818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 917 IncrementalHoareTripleChecker+Valid, 5901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-12-17 14:28:04,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2737 Valid, 3393 Invalid, 6818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [917 Valid, 5901 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2021-12-17 14:28:04,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6317 states. [2021-12-17 14:28:04,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6317 to 4691. [2021-12-17 14:28:04,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4691 states, 3657 states have (on average 1.5849056603773586) internal successors, (5796), 3818 states have internal predecessors, (5796), 786 states have call successors, (786), 219 states have call predecessors, (786), 247 states have return successors, (1019), 773 states have call predecessors, (1019), 781 states have call successors, (1019) [2021-12-17 14:28:04,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4691 states to 4691 states and 7601 transitions. [2021-12-17 14:28:04,597 INFO L78 Accepts]: Start accepts. Automaton has 4691 states and 7601 transitions. Word has length 159 [2021-12-17 14:28:04,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:28:04,598 INFO L470 AbstractCegarLoop]: Abstraction has 4691 states and 7601 transitions. [2021-12-17 14:28:04,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.1) internal successors, (111), 7 states have internal predecessors, (111), 4 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-12-17 14:28:04,598 INFO L276 IsEmpty]: Start isEmpty. Operand 4691 states and 7601 transitions. [2021-12-17 14:28:04,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-17 14:28:04,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:28:04,600 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:28:04,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-17 14:28:04,600 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:28:04,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:28:04,601 INFO L85 PathProgramCache]: Analyzing trace with hash -2083788287, now seen corresponding path program 1 times [2021-12-17 14:28:04,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:28:04,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239545857] [2021-12-17 14:28:04,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:28:04,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:28:04,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:04,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:28:04,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:04,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:28:04,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:04,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:28:04,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:04,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 14:28:04,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:04,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:28:04,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:04,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:28:04,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:04,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 14:28:04,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:04,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:28:04,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:04,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:28:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:04,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:28:04,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:04,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:28:04,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:04,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:28:04,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:05,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 14:28:05,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:05,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:28:05,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:05,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-17 14:28:05,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:05,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-17 14:28:05,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:05,020 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-17 14:28:05,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:28:05,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239545857] [2021-12-17 14:28:05,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239545857] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:28:05,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073328840] [2021-12-17 14:28:05,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:28:05,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:28:05,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:28:05,024 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:28:05,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-17 14:28:05,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:05,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 1917 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 14:28:05,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:28:05,586 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-17 14:28:05,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:28:05,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073328840] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:28:05,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:28:05,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 16 [2021-12-17 14:28:05,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333221936] [2021-12-17 14:28:05,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:28:05,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 14:28:05,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:28:05,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 14:28:05,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-12-17 14:28:05,588 INFO L87 Difference]: Start difference. First operand 4691 states and 7601 transitions. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-12-17 14:28:05,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:28:05,998 INFO L93 Difference]: Finished difference Result 4970 states and 8043 transitions. [2021-12-17 14:28:05,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 14:28:05,999 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) Word has length 164 [2021-12-17 14:28:05,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:28:06,021 INFO L225 Difference]: With dead ends: 4970 [2021-12-17 14:28:06,021 INFO L226 Difference]: Without dead ends: 4955 [2021-12-17 14:28:06,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 195 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-12-17 14:28:06,025 INFO L933 BasicCegarLoop]: 864 mSDtfsCounter, 67 mSDsluCounter, 2524 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 3388 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:28:06,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 3388 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:28:06,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4955 states. [2021-12-17 14:28:06,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4955 to 4721. [2021-12-17 14:28:06,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4721 states, 3687 states have (on average 1.580146460537022) internal successors, (5826), 3848 states have internal predecessors, (5826), 786 states have call successors, (786), 219 states have call predecessors, (786), 247 states have return successors, (1019), 773 states have call predecessors, (1019), 781 states have call successors, (1019) [2021-12-17 14:28:06,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4721 states to 4721 states and 7631 transitions. [2021-12-17 14:28:06,494 INFO L78 Accepts]: Start accepts. Automaton has 4721 states and 7631 transitions. Word has length 164 [2021-12-17 14:28:06,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:28:06,494 INFO L470 AbstractCegarLoop]: Abstraction has 4721 states and 7631 transitions. [2021-12-17 14:28:06,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-12-17 14:28:06,494 INFO L276 IsEmpty]: Start isEmpty. Operand 4721 states and 7631 transitions. [2021-12-17 14:28:06,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-12-17 14:28:06,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:28:06,499 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:28:06,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-12-17 14:28:06,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-17 14:28:06,718 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:28:06,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:28:06,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1042051484, now seen corresponding path program 1 times [2021-12-17 14:28:06,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:28:06,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830315025] [2021-12-17 14:28:06,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:28:06,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:28:06,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:06,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:28:06,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:06,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:28:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:06,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:28:06,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:06,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 14:28:06,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:06,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:28:06,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:06,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:28:06,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:07,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 14:28:07,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:07,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:28:07,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:07,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:28:07,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:07,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:28:07,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:07,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:28:07,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:07,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 14:28:07,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:07,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 14:28:07,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:07,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 14:28:07,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:07,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:28:07,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:07,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 14:28:07,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:07,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 14:28:07,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:07,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-17 14:28:07,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:07,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-17 14:28:07,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:07,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-17 14:28:07,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:07,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 14:28:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:07,155 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-17 14:28:07,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:28:07,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830315025] [2021-12-17 14:28:07,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830315025] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:28:07,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485969151] [2021-12-17 14:28:07,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:28:07,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:28:07,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:28:07,160 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:28:07,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-17 14:28:07,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:07,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 2039 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-17 14:28:07,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:28:07,831 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 46 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 14:28:07,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:28:08,598 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-17 14:28:08,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485969151] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 14:28:08,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 14:28:08,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 8] total 24 [2021-12-17 14:28:08,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285113155] [2021-12-17 14:28:08,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 14:28:08,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-17 14:28:08,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:28:08,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-17 14:28:08,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-12-17 14:28:08,601 INFO L87 Difference]: Start difference. First operand 4721 states and 7631 transitions. Second operand has 24 states, 23 states have (on average 12.73913043478261) internal successors, (293), 18 states have internal predecessors, (293), 9 states have call successors, (56), 8 states have call predecessors, (56), 13 states have return successors, (54), 12 states have call predecessors, (54), 9 states have call successors, (54) [2021-12-17 14:28:28,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:28:28,022 INFO L93 Difference]: Finished difference Result 20139 states and 36290 transitions. [2021-12-17 14:28:28,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-17 14:28:28,022 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 12.73913043478261) internal successors, (293), 18 states have internal predecessors, (293), 9 states have call successors, (56), 8 states have call predecessors, (56), 13 states have return successors, (54), 12 states have call predecessors, (54), 9 states have call successors, (54) Word has length 203 [2021-12-17 14:28:28,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:28:28,110 INFO L225 Difference]: With dead ends: 20139 [2021-12-17 14:28:28,110 INFO L226 Difference]: Without dead ends: 15532 [2021-12-17 14:28:28,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 461 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=850, Invalid=4120, Unknown=0, NotChecked=0, Total=4970 [2021-12-17 14:28:28,139 INFO L933 BasicCegarLoop]: 1810 mSDtfsCounter, 6477 mSDsluCounter, 10410 mSDsCounter, 0 mSdLazyCounter, 22360 mSolverCounterSat, 2883 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6486 SdHoareTripleChecker+Valid, 12220 SdHoareTripleChecker+Invalid, 25243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2883 IncrementalHoareTripleChecker+Valid, 22360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2021-12-17 14:28:28,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6486 Valid, 12220 Invalid, 25243 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2883 Valid, 22360 Invalid, 0 Unknown, 0 Unchecked, 13.3s Time] [2021-12-17 14:28:28,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15532 states. [2021-12-17 14:28:29,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15532 to 10589. [2021-12-17 14:28:29,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10589 states, 8083 states have (on average 1.5595694667821354) internal successors, (12606), 8469 states have internal predecessors, (12606), 1944 states have call successors, (1944), 463 states have call predecessors, (1944), 561 states have return successors, (2617), 1946 states have call predecessors, (2617), 1939 states have call successors, (2617) [2021-12-17 14:28:29,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10589 states to 10589 states and 17167 transitions. [2021-12-17 14:28:29,322 INFO L78 Accepts]: Start accepts. Automaton has 10589 states and 17167 transitions. Word has length 203 [2021-12-17 14:28:29,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:28:29,322 INFO L470 AbstractCegarLoop]: Abstraction has 10589 states and 17167 transitions. [2021-12-17 14:28:29,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 12.73913043478261) internal successors, (293), 18 states have internal predecessors, (293), 9 states have call successors, (56), 8 states have call predecessors, (56), 13 states have return successors, (54), 12 states have call predecessors, (54), 9 states have call successors, (54) [2021-12-17 14:28:29,323 INFO L276 IsEmpty]: Start isEmpty. Operand 10589 states and 17167 transitions. [2021-12-17 14:28:29,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-12-17 14:28:29,337 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:28:29,338 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:28:29,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-12-17 14:28:29,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-17 14:28:29,552 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:28:29,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:28:29,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1907335427, now seen corresponding path program 1 times [2021-12-17 14:28:29,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:28:29,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242383539] [2021-12-17 14:28:29,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:28:29,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:28:29,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:29,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:28:29,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:29,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:28:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:29,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:28:29,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:29,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-17 14:28:29,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:29,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:28:29,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:29,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:28:29,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:29,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-17 14:28:29,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:29,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:28:29,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:29,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:28:29,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:29,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:28:29,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:29,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:28:29,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:29,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:28:29,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:29,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 14:28:29,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:29,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:28:29,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:29,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-17 14:28:29,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:29,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-17 14:28:29,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:29,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-17 14:28:29,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:29,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-17 14:28:29,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:29,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-17 14:28:29,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:29,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 14:28:29,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:29,909 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-17 14:28:29,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:28:29,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242383539] [2021-12-17 14:28:29,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242383539] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:28:29,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459572121] [2021-12-17 14:28:29,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:28:29,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:28:29,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:28:29,913 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:28:29,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-17 14:28:30,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:30,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 2018 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 14:28:30,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:28:30,438 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-17 14:28:30,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:28:30,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459572121] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:28:30,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:28:30,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2021-12-17 14:28:30,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433470670] [2021-12-17 14:28:30,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:28:30,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 14:28:30,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:28:30,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 14:28:30,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-17 14:28:30,440 INFO L87 Difference]: Start difference. First operand 10589 states and 17167 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-17 14:28:31,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:28:31,498 INFO L93 Difference]: Finished difference Result 15421 states and 24924 transitions. [2021-12-17 14:28:31,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 14:28:31,499 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 206 [2021-12-17 14:28:31,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:28:31,539 INFO L225 Difference]: With dead ends: 15421 [2021-12-17 14:28:31,540 INFO L226 Difference]: Without dead ends: 10646 [2021-12-17 14:28:31,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-17 14:28:31,554 INFO L933 BasicCegarLoop]: 811 mSDtfsCounter, 81 mSDsluCounter, 1585 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 2396 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:28:31,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 2396 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:28:31,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10646 states. [2021-12-17 14:28:32,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10646 to 10586. [2021-12-17 14:28:32,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10586 states, 8080 states have (on average 1.5596534653465346) internal successors, (12602), 8466 states have internal predecessors, (12602), 1944 states have call successors, (1944), 463 states have call predecessors, (1944), 561 states have return successors, (2617), 1946 states have call predecessors, (2617), 1939 states have call successors, (2617) [2021-12-17 14:28:32,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10586 states to 10586 states and 17163 transitions. [2021-12-17 14:28:32,547 INFO L78 Accepts]: Start accepts. Automaton has 10586 states and 17163 transitions. Word has length 206 [2021-12-17 14:28:32,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:28:32,548 INFO L470 AbstractCegarLoop]: Abstraction has 10586 states and 17163 transitions. [2021-12-17 14:28:32,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-17 14:28:32,548 INFO L276 IsEmpty]: Start isEmpty. Operand 10586 states and 17163 transitions. [2021-12-17 14:28:32,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-12-17 14:28:32,558 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:28:32,558 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:28:32,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-12-17 14:28:32,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-17 14:28:32,759 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:28:32,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:28:32,759 INFO L85 PathProgramCache]: Analyzing trace with hash 522601281, now seen corresponding path program 1 times [2021-12-17 14:28:32,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:28:32,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955053424] [2021-12-17 14:28:32,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:28:32,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:28:32,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:32,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:28:32,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:32,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:28:32,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:32,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:28:32,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:32,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 14:28:32,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:32,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:28:32,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:32,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:28:32,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:33,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 14:28:33,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:33,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:28:33,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:33,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:28:33,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:33,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:28:33,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:33,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:28:33,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:33,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:28:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:33,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 14:28:33,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:33,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:28:33,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:33,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-17 14:28:33,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:33,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-17 14:28:33,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:33,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-17 14:28:33,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:33,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-17 14:28:33,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:33,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-17 14:28:33,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:33,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 14:28:33,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:33,077 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-17 14:28:33,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:28:33,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955053424] [2021-12-17 14:28:33,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955053424] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:28:33,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719375980] [2021-12-17 14:28:33,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:28:33,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:28:33,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:28:33,079 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:28:33,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-17 14:28:33,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:33,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 2019 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 14:28:33,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:28:33,702 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 55 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-17 14:28:33,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:28:34,286 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-17 14:28:34,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719375980] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 14:28:34,286 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 14:28:34,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 22 [2021-12-17 14:28:34,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468444651] [2021-12-17 14:28:34,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 14:28:34,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 14:28:34,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:28:34,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 14:28:34,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-12-17 14:28:34,288 INFO L87 Difference]: Start difference. First operand 10586 states and 17163 transitions. Second operand has 22 states, 21 states have (on average 12.476190476190476) internal successors, (262), 16 states have internal predecessors, (262), 8 states have call successors, (47), 8 states have call predecessors, (47), 11 states have return successors, (47), 10 states have call predecessors, (47), 8 states have call successors, (47) [2021-12-17 14:28:50,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:28:50,829 INFO L93 Difference]: Finished difference Result 34061 states and 59651 transitions. [2021-12-17 14:28:50,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-17 14:28:50,829 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 12.476190476190476) internal successors, (262), 16 states have internal predecessors, (262), 8 states have call successors, (47), 8 states have call predecessors, (47), 11 states have return successors, (47), 10 states have call predecessors, (47), 8 states have call successors, (47) Word has length 207 [2021-12-17 14:28:50,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:28:50,985 INFO L225 Difference]: With dead ends: 34061 [2021-12-17 14:28:50,985 INFO L226 Difference]: Without dead ends: 28910 [2021-12-17 14:28:51,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 459 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=490, Invalid=2372, Unknown=0, NotChecked=0, Total=2862 [2021-12-17 14:28:51,015 INFO L933 BasicCegarLoop]: 1718 mSDtfsCounter, 6522 mSDsluCounter, 9470 mSDsCounter, 0 mSdLazyCounter, 16911 mSolverCounterSat, 2639 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6536 SdHoareTripleChecker+Valid, 11188 SdHoareTripleChecker+Invalid, 19550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2639 IncrementalHoareTripleChecker+Valid, 16911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:28:51,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6536 Valid, 11188 Invalid, 19550 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2639 Valid, 16911 Invalid, 0 Unknown, 0 Unchecked, 11.0s Time] [2021-12-17 14:28:51,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28910 states. [2021-12-17 14:28:53,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28910 to 23221. [2021-12-17 14:28:53,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23221 states, 17222 states have (on average 1.5577168737661131) internal successors, (26827), 18158 states have internal predecessors, (26827), 4807 states have call successors, (4807), 911 states have call predecessors, (4807), 1191 states have return successors, (6535), 4871 states have call predecessors, (6535), 4802 states have call successors, (6535) [2021-12-17 14:28:53,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23221 states to 23221 states and 38169 transitions. [2021-12-17 14:28:53,355 INFO L78 Accepts]: Start accepts. Automaton has 23221 states and 38169 transitions. Word has length 207 [2021-12-17 14:28:53,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:28:53,356 INFO L470 AbstractCegarLoop]: Abstraction has 23221 states and 38169 transitions. [2021-12-17 14:28:53,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 12.476190476190476) internal successors, (262), 16 states have internal predecessors, (262), 8 states have call successors, (47), 8 states have call predecessors, (47), 11 states have return successors, (47), 10 states have call predecessors, (47), 8 states have call successors, (47) [2021-12-17 14:28:53,356 INFO L276 IsEmpty]: Start isEmpty. Operand 23221 states and 38169 transitions. [2021-12-17 14:28:53,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-12-17 14:28:53,374 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:28:53,374 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:28:53,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-12-17 14:28:53,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:28:53,734 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:28:53,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:28:53,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1136111132, now seen corresponding path program 1 times [2021-12-17 14:28:53,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:28:53,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018600447] [2021-12-17 14:28:53,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:28:53,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:28:53,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:53,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:28:53,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:53,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:28:53,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:53,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:28:53,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:53,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 14:28:53,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:53,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:28:53,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:53,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:28:53,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:54,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 14:28:54,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:54,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:28:54,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:54,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:28:54,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:54,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:28:54,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:54,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:28:54,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:54,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 14:28:54,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:54,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 14:28:54,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:54,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 14:28:54,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:54,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:28:54,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:54,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 14:28:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:54,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 14:28:54,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:54,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-17 14:28:54,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:54,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:28:54,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:54,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:28:54,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:54,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:28:54,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:54,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:28:54,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:54,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 14:28:54,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:54,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:28:54,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:54,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 14:28:54,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:54,216 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-12-17 14:28:54,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:28:54,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018600447] [2021-12-17 14:28:54,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018600447] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:28:54,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505342222] [2021-12-17 14:28:54,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:28:54,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:28:54,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:28:54,220 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:28:54,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-17 14:28:54,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:28:54,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 2362 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 14:28:54,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:28:54,772 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-12-17 14:28:54,772 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:28:54,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505342222] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:28:54,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:28:54,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 14 [2021-12-17 14:28:54,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562645717] [2021-12-17 14:28:54,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:28:54,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 14:28:54,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:28:54,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 14:28:54,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-12-17 14:28:54,773 INFO L87 Difference]: Start difference. First operand 23221 states and 38169 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-12-17 14:28:57,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:28:57,163 INFO L93 Difference]: Finished difference Result 45981 states and 76016 transitions. [2021-12-17 14:28:57,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 14:28:57,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 235 [2021-12-17 14:28:57,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:28:57,264 INFO L225 Difference]: With dead ends: 45981 [2021-12-17 14:28:57,265 INFO L226 Difference]: Without dead ends: 22878 [2021-12-17 14:28:57,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 285 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-12-17 14:28:57,339 INFO L933 BasicCegarLoop]: 811 mSDtfsCounter, 801 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 801 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:28:57,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [801 Valid, 811 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:28:57,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22878 states. [2021-12-17 14:28:59,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22878 to 22878. [2021-12-17 14:28:59,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22878 states, 16994 states have (on average 1.5517241379310345) internal successors, (26370), 17929 states have internal predecessors, (26370), 4692 states have call successors, (4692), 911 states have call predecessors, (4692), 1191 states have return successors, (6421), 4757 states have call predecessors, (6421), 4688 states have call successors, (6421) [2021-12-17 14:28:59,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22878 states to 22878 states and 37483 transitions. [2021-12-17 14:28:59,778 INFO L78 Accepts]: Start accepts. Automaton has 22878 states and 37483 transitions. Word has length 235 [2021-12-17 14:28:59,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:28:59,779 INFO L470 AbstractCegarLoop]: Abstraction has 22878 states and 37483 transitions. [2021-12-17 14:28:59,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2021-12-17 14:28:59,779 INFO L276 IsEmpty]: Start isEmpty. Operand 22878 states and 37483 transitions. [2021-12-17 14:28:59,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-12-17 14:28:59,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:28:59,801 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:28:59,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-12-17 14:29:00,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:29:00,002 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:29:00,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:29:00,002 INFO L85 PathProgramCache]: Analyzing trace with hash -603868236, now seen corresponding path program 1 times [2021-12-17 14:29:00,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:29:00,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210137377] [2021-12-17 14:29:00,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:29:00,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:29:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:00,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:29:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:00,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:29:00,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:00,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:29:00,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:00,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 14:29:00,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:00,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:29:00,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:00,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:29:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:00,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 14:29:00,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:00,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:29:00,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:00,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:29:00,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:00,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:29:00,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:00,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:29:00,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:00,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:29:00,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:00,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 14:29:00,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:00,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:29:00,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:00,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-17 14:29:00,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:00,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-17 14:29:00,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:00,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-17 14:29:00,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:00,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:29:00,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:00,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:29:00,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:00,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:29:00,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:00,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:29:00,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:00,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 14:29:00,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:00,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:29:00,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:00,431 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-17 14:29:00,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:29:00,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210137377] [2021-12-17 14:29:00,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210137377] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:29:00,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289459551] [2021-12-17 14:29:00,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:29:00,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:29:00,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:29:00,436 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:29:00,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-17 14:29:00,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:00,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 2326 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 14:29:00,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:29:01,041 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 21 proven. 65 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 14:29:01,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:29:01,454 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-12-17 14:29:01,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289459551] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 14:29:01,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 14:29:01,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 17 [2021-12-17 14:29:01,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346200791] [2021-12-17 14:29:01,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 14:29:01,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 14:29:01,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:29:01,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 14:29:01,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-12-17 14:29:01,457 INFO L87 Difference]: Start difference. First operand 22878 states and 37483 transitions. Second operand has 17 states, 17 states have (on average 15.411764705882353) internal successors, (262), 12 states have internal predecessors, (262), 8 states have call successors, (45), 8 states have call predecessors, (45), 8 states have return successors, (44), 11 states have call predecessors, (44), 8 states have call successors, (44) [2021-12-17 14:29:18,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:29:18,545 INFO L93 Difference]: Finished difference Result 69196 states and 122467 transitions. [2021-12-17 14:29:18,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-17 14:29:18,546 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 15.411764705882353) internal successors, (262), 12 states have internal predecessors, (262), 8 states have call successors, (45), 8 states have call predecessors, (45), 8 states have return successors, (44), 11 states have call predecessors, (44), 8 states have call successors, (44) Word has length 231 [2021-12-17 14:29:18,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:29:18,834 INFO L225 Difference]: With dead ends: 69196 [2021-12-17 14:29:18,834 INFO L226 Difference]: Without dead ends: 46448 [2021-12-17 14:29:18,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 522 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1725 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=926, Invalid=4476, Unknown=0, NotChecked=0, Total=5402 [2021-12-17 14:29:18,976 INFO L933 BasicCegarLoop]: 1123 mSDtfsCounter, 7887 mSDsluCounter, 3899 mSDsCounter, 0 mSdLazyCounter, 8540 mSolverCounterSat, 3487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7887 SdHoareTripleChecker+Valid, 5022 SdHoareTripleChecker+Invalid, 12027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3487 IncrementalHoareTripleChecker+Valid, 8540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2021-12-17 14:29:18,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7887 Valid, 5022 Invalid, 12027 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3487 Valid, 8540 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2021-12-17 14:29:19,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46448 states. [2021-12-17 14:29:22,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46448 to 32402. [2021-12-17 14:29:22,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32402 states, 24362 states have (on average 1.494540678105246) internal successors, (36410), 25501 states have internal predecessors, (36410), 6150 states have call successors, (6150), 1441 states have call predecessors, (6150), 1889 states have return successors, (10062), 6179 states have call predecessors, (10062), 6146 states have call successors, (10062) [2021-12-17 14:29:23,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32402 states to 32402 states and 52622 transitions. [2021-12-17 14:29:23,109 INFO L78 Accepts]: Start accepts. Automaton has 32402 states and 52622 transitions. Word has length 231 [2021-12-17 14:29:23,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:29:23,109 INFO L470 AbstractCegarLoop]: Abstraction has 32402 states and 52622 transitions. [2021-12-17 14:29:23,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 15.411764705882353) internal successors, (262), 12 states have internal predecessors, (262), 8 states have call successors, (45), 8 states have call predecessors, (45), 8 states have return successors, (44), 11 states have call predecessors, (44), 8 states have call successors, (44) [2021-12-17 14:29:23,110 INFO L276 IsEmpty]: Start isEmpty. Operand 32402 states and 52622 transitions. [2021-12-17 14:29:23,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-12-17 14:29:23,137 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:29:23,137 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:29:23,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-12-17 14:29:23,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-12-17 14:29:23,340 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:29:23,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:29:23,340 INFO L85 PathProgramCache]: Analyzing trace with hash -845690841, now seen corresponding path program 1 times [2021-12-17 14:29:23,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:29:23,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442954841] [2021-12-17 14:29:23,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:29:23,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:29:23,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:23,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 14:29:23,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:23,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:29:23,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:23,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:29:23,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:23,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 14:29:23,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:23,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:29:23,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:23,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 14:29:23,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:23,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 14:29:23,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:23,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:29:23,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:23,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:29:23,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:23,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:29:23,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:23,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:29:23,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:23,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:29:23,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:23,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 14:29:23,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:23,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:29:23,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:23,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-17 14:29:23,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:23,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-17 14:29:23,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:23,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-17 14:29:23,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:23,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 14:29:23,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:23,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 14:29:23,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:23,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:29:23,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:23,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 14:29:23,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:23,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 14:29:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:23,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:29:23,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:23,720 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-17 14:29:23,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:29:23,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442954841] [2021-12-17 14:29:23,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442954841] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:29:23,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853286918] [2021-12-17 14:29:23,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:29:23,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:29:23,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:29:23,722 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:29:23,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-17 14:29:23,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:29:24,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 2325 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 14:29:24,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:29:24,328 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 34 proven. 46 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-17 14:29:24,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:29:24,835 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 14 proven. 29 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-12-17 14:29:24,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853286918] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 14:29:24,836 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 14:29:24,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2021-12-17 14:29:24,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535389324] [2021-12-17 14:29:24,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 14:29:24,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 14:29:24,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:29:24,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 14:29:24,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-12-17 14:29:24,837 INFO L87 Difference]: Start difference. First operand 32402 states and 52622 transitions. Second operand has 18 states, 18 states have (on average 13.333333333333334) internal successors, (240), 15 states have internal predecessors, (240), 11 states have call successors, (45), 11 states have call predecessors, (45), 9 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) [2021-12-17 14:31:41,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:31:41,490 INFO L93 Difference]: Finished difference Result 207635 states and 399664 transitions. [2021-12-17 14:31:41,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 268 states. [2021-12-17 14:31:41,491 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 13.333333333333334) internal successors, (240), 15 states have internal predecessors, (240), 11 states have call successors, (45), 11 states have call predecessors, (45), 9 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) Word has length 232 [2021-12-17 14:31:41,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:31:43,670 INFO L225 Difference]: With dead ends: 207635 [2021-12-17 14:31:43,670 INFO L226 Difference]: Without dead ends: 175351 [2021-12-17 14:31:44,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 977 GetRequests, 669 SyntacticMatches, 36 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40915 ImplicationChecksByTransitivity, 29.2s TimeCoverageRelationStatistics Valid=7967, Invalid=66835, Unknown=0, NotChecked=0, Total=74802 [2021-12-17 14:31:44,102 INFO L933 BasicCegarLoop]: 2572 mSDtfsCounter, 32435 mSDsluCounter, 8494 mSDsCounter, 0 mSdLazyCounter, 49007 mSolverCounterSat, 36124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 70.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32465 SdHoareTripleChecker+Valid, 11066 SdHoareTripleChecker+Invalid, 85131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 36124 IncrementalHoareTripleChecker+Valid, 49007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 77.7s IncrementalHoareTripleChecker+Time [2021-12-17 14:31:44,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32465 Valid, 11066 Invalid, 85131 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [36124 Valid, 49007 Invalid, 0 Unknown, 0 Unchecked, 77.7s Time] [2021-12-17 14:31:44,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175351 states.