/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--dec--tulip--xircom_cb.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 13:15:04,152 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 13:15:04,155 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 13:15:04,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 13:15:04,201 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 13:15:04,202 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 13:15:04,204 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 13:15:04,207 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 13:15:04,210 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 13:15:04,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 13:15:04,213 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 13:15:04,214 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 13:15:04,215 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 13:15:04,216 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 13:15:04,218 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 13:15:04,219 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 13:15:04,220 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 13:15:04,222 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 13:15:04,224 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 13:15:04,226 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 13:15:04,228 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 13:15:04,230 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 13:15:04,232 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 13:15:04,233 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 13:15:04,256 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 13:15:04,257 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 13:15:04,257 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 13:15:04,259 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 13:15:04,259 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 13:15:04,261 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 13:15:04,261 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 13:15:04,262 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 13:15:04,263 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 13:15:04,264 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 13:15:04,265 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 13:15:04,266 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 13:15:04,267 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 13:15:04,267 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 13:15:04,267 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 13:15:04,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 13:15:04,269 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 13:15:04,271 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 13:15:04,307 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 13:15:04,308 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 13:15:04,311 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 13:15:04,313 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 13:15:04,313 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 13:15:04,313 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 13:15:04,314 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 13:15:04,314 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 13:15:04,314 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 13:15:04,314 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 13:15:04,315 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 13:15:04,315 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 13:15:04,315 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 13:15:04,315 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 13:15:04,316 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 13:15:04,317 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 13:15:04,317 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 13:15:04,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 13:15:04,318 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 13:15:04,318 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 13:15:04,319 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 13:15:04,319 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 13:15:04,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 13:15:04,320 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 13:15:04,320 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 13:15:04,320 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 13:15:04,749 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 13:15:04,790 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 13:15:04,793 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 13:15:04,795 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 13:15:04,795 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 13:15:04,797 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--dec--tulip--xircom_cb.ko-entry_point.cil.out.i [2020-12-22 13:15:04,903 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea4a9faad/a5347d1873d04b77a06301b150e34d24/FLAGba1228903 [2020-12-22 13:15:06,023 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 13:15:06,024 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--dec--tulip--xircom_cb.ko-entry_point.cil.out.i [2020-12-22 13:15:06,089 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea4a9faad/a5347d1873d04b77a06301b150e34d24/FLAGba1228903 [2020-12-22 13:15:06,412 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea4a9faad/a5347d1873d04b77a06301b150e34d24 [2020-12-22 13:15:06,415 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 13:15:06,418 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 13:15:06,420 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 13:15:06,420 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 13:15:06,424 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 13:15:06,425 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:15:06" (1/1) ... [2020-12-22 13:15:06,426 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7526bd06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:06, skipping insertion in model container [2020-12-22 13:15:06,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:15:06" (1/1) ... [2020-12-22 13:15:06,435 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 13:15:06,589 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 13:15:07,565 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--dec--tulip--xircom_cb.ko-entry_point.cil.out.i[161211,161224] [2020-12-22 13:15:08,209 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:15:08,244 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 13:15:08,483 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--dec--tulip--xircom_cb.ko-entry_point.cil.out.i[161211,161224] [2020-12-22 13:15:08,629 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:15:08,905 INFO L208 MainTranslator]: Completed translation [2020-12-22 13:15:08,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:08 WrapperNode [2020-12-22 13:15:08,906 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 13:15:08,908 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 13:15:08,908 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 13:15:08,908 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 13:15:08,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:08" (1/1) ... [2020-12-22 13:15:08,975 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:08" (1/1) ... [2020-12-22 13:15:09,309 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 13:15:09,312 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 13:15:09,313 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 13:15:09,313 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 13:15:09,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:08" (1/1) ... [2020-12-22 13:15:09,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:08" (1/1) ... [2020-12-22 13:15:09,399 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:08" (1/1) ... [2020-12-22 13:15:09,399 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:08" (1/1) ... [2020-12-22 13:15:09,571 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:08" (1/1) ... [2020-12-22 13:15:09,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:08" (1/1) ... [2020-12-22 13:15:09,666 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:08" (1/1) ... [2020-12-22 13:15:09,855 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 13:15:09,857 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 13:15:09,857 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 13:15:09,857 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 13:15:09,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 13:15:09,984 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2020-12-22 13:15:09,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2020-12-22 13:15:09,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 13:15:09,985 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 13:15:09,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 13:15:09,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 13:15:09,986 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2020-12-22 13:15:09,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-12-22 13:15:09,987 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 13:15:09,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 13:15:09,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 13:15:09,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 13:15:09,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 13:15:09,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 13:15:09,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 13:15:17,119 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 13:15:17,120 INFO L299 CfgBuilder]: Removed 1398 assume(true) statements. [2020-12-22 13:15:17,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:15:17 BoogieIcfgContainer [2020-12-22 13:15:17,124 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 13:15:17,126 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 13:15:17,126 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 13:15:17,130 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 13:15:17,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:15:06" (1/3) ... [2020-12-22 13:15:17,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5616009 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:15:17, skipping insertion in model container [2020-12-22 13:15:17,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:15:08" (2/3) ... [2020-12-22 13:15:17,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5616009 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:15:17, skipping insertion in model container [2020-12-22 13:15:17,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:15:17" (3/3) ... [2020-12-22 13:15:17,134 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--dec--tulip--xircom_cb.ko-entry_point.cil.out.i [2020-12-22 13:15:17,141 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 13:15:17,159 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 13:15:17,178 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 13:15:17,215 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 13:15:17,216 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 13:15:17,216 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 13:15:17,216 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 13:15:17,216 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 13:15:17,216 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 13:15:17,216 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 13:15:17,217 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 13:15:17,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1196 states. [2020-12-22 13:15:17,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 13:15:17,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:15:17,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:15:17,268 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:15:17,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:15:17,275 INFO L82 PathProgramCache]: Analyzing trace with hash 124254041, now seen corresponding path program 1 times [2020-12-22 13:15:17,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:15:17,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363735311] [2020-12-22 13:15:17,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:15:17,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:17,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:15:17,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363735311] [2020-12-22 13:15:17,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:15:17,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:15:17,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004184854] [2020-12-22 13:15:17,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:15:17,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:15:17,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:15:17,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:15:17,883 INFO L87 Difference]: Start difference. First operand 1196 states. Second operand 3 states. [2020-12-22 13:15:18,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:15:18,362 INFO L93 Difference]: Finished difference Result 3547 states and 4973 transitions. [2020-12-22 13:15:18,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:15:18,364 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-12-22 13:15:18,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:15:18,403 INFO L225 Difference]: With dead ends: 3547 [2020-12-22 13:15:18,403 INFO L226 Difference]: Without dead ends: 2314 [2020-12-22 13:15:18,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:15:18,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2020-12-22 13:15:18,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 2314. [2020-12-22 13:15:18,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2314 states. [2020-12-22 13:15:18,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 3099 transitions. [2020-12-22 13:15:18,613 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 3099 transitions. Word has length 20 [2020-12-22 13:15:18,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:15:18,613 INFO L481 AbstractCegarLoop]: Abstraction has 2314 states and 3099 transitions. [2020-12-22 13:15:18,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:15:18,613 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 3099 transitions. [2020-12-22 13:15:18,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 13:15:18,621 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:15:18,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:15:18,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 13:15:18,622 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:15:18,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:15:18,626 INFO L82 PathProgramCache]: Analyzing trace with hash -573068823, now seen corresponding path program 1 times [2020-12-22 13:15:18,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:15:18,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622983733] [2020-12-22 13:15:18,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:15:18,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:18,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:15:18,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622983733] [2020-12-22 13:15:18,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:15:18,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:15:18,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891811714] [2020-12-22 13:15:18,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:15:18,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:15:18,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:15:18,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:15:18,866 INFO L87 Difference]: Start difference. First operand 2314 states and 3099 transitions. Second operand 5 states. [2020-12-22 13:15:19,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:15:19,426 INFO L93 Difference]: Finished difference Result 6904 states and 9254 transitions. [2020-12-22 13:15:19,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:15:19,427 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-12-22 13:15:19,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:15:19,451 INFO L225 Difference]: With dead ends: 6904 [2020-12-22 13:15:19,452 INFO L226 Difference]: Without dead ends: 4604 [2020-12-22 13:15:19,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:15:19,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4604 states. [2020-12-22 13:15:19,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4604 to 4540. [2020-12-22 13:15:19,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4540 states. [2020-12-22 13:15:19,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4540 states to 4540 states and 6073 transitions. [2020-12-22 13:15:19,624 INFO L78 Accepts]: Start accepts. Automaton has 4540 states and 6073 transitions. Word has length 24 [2020-12-22 13:15:19,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:15:19,625 INFO L481 AbstractCegarLoop]: Abstraction has 4540 states and 6073 transitions. [2020-12-22 13:15:19,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:15:19,625 INFO L276 IsEmpty]: Start isEmpty. Operand 4540 states and 6073 transitions. [2020-12-22 13:15:19,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 13:15:19,634 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:15:19,634 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 13:15:19,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 13:15:19,635 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:15:19,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:15:19,635 INFO L82 PathProgramCache]: Analyzing trace with hash 260287450, now seen corresponding path program 1 times [2020-12-22 13:15:19,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:15:19,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068229817] [2020-12-22 13:15:19,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:15:19,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:19,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 13:15:19,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068229817] [2020-12-22 13:15:19,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:15:19,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:15:19,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797071558] [2020-12-22 13:15:19,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:15:19,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:15:19,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:15:19,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:15:19,768 INFO L87 Difference]: Start difference. First operand 4540 states and 6073 transitions. Second operand 4 states. [2020-12-22 13:15:20,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:15:20,459 INFO L93 Difference]: Finished difference Result 19720 states and 26309 transitions. [2020-12-22 13:15:20,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:15:20,467 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-12-22 13:15:20,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:15:20,558 INFO L225 Difference]: With dead ends: 19720 [2020-12-22 13:15:20,558 INFO L226 Difference]: Without dead ends: 15198 [2020-12-22 13:15:20,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:15:20,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15198 states. [2020-12-22 13:15:20,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15198 to 7736. [2020-12-22 13:15:20,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7736 states. [2020-12-22 13:15:20,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7736 states to 7736 states and 10316 transitions. [2020-12-22 13:15:20,996 INFO L78 Accepts]: Start accepts. Automaton has 7736 states and 10316 transitions. Word has length 63 [2020-12-22 13:15:20,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:15:20,996 INFO L481 AbstractCegarLoop]: Abstraction has 7736 states and 10316 transitions. [2020-12-22 13:15:20,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:15:20,997 INFO L276 IsEmpty]: Start isEmpty. Operand 7736 states and 10316 transitions. [2020-12-22 13:15:21,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 13:15:21,009 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:15:21,009 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 13:15:21,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 13:15:21,009 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:15:21,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:15:21,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1945592412, now seen corresponding path program 1 times [2020-12-22 13:15:21,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:15:21,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266209915] [2020-12-22 13:15:21,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:15:21,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:21,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 13:15:21,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266209915] [2020-12-22 13:15:21,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:15:21,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:15:21,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297135452] [2020-12-22 13:15:21,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:15:21,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:15:21,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:15:21,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:15:21,228 INFO L87 Difference]: Start difference. First operand 7736 states and 10316 transitions. Second operand 4 states. [2020-12-22 13:15:22,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:15:22,485 INFO L93 Difference]: Finished difference Result 35700 states and 47532 transitions. [2020-12-22 13:15:22,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:15:22,485 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-12-22 13:15:22,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:15:22,591 INFO L225 Difference]: With dead ends: 35700 [2020-12-22 13:15:22,592 INFO L226 Difference]: Without dead ends: 27982 [2020-12-22 13:15:22,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:15:22,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27982 states. [2020-12-22 13:15:23,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27982 to 15124. [2020-12-22 13:15:23,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15124 states. [2020-12-22 13:15:23,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15124 states to 15124 states and 20146 transitions. [2020-12-22 13:15:23,544 INFO L78 Accepts]: Start accepts. Automaton has 15124 states and 20146 transitions. Word has length 64 [2020-12-22 13:15:23,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:15:23,544 INFO L481 AbstractCegarLoop]: Abstraction has 15124 states and 20146 transitions. [2020-12-22 13:15:23,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:15:23,545 INFO L276 IsEmpty]: Start isEmpty. Operand 15124 states and 20146 transitions. [2020-12-22 13:15:23,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 13:15:23,556 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:15:23,556 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 13:15:23,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 13:15:23,557 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:15:23,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:15:23,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1296173829, now seen corresponding path program 1 times [2020-12-22 13:15:23,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:15:23,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467867123] [2020-12-22 13:15:23,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:15:23,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:23,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 13:15:23,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467867123] [2020-12-22 13:15:23,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:15:23,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:15:23,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388264537] [2020-12-22 13:15:23,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:15:23,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:15:23,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:15:23,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:15:23,831 INFO L87 Difference]: Start difference. First operand 15124 states and 20146 transitions. Second operand 4 states. [2020-12-22 13:15:25,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:15:25,944 INFO L93 Difference]: Finished difference Result 70372 states and 93614 transitions. [2020-12-22 13:15:25,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:15:25,945 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-12-22 13:15:25,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:15:26,064 INFO L225 Difference]: With dead ends: 70372 [2020-12-22 13:15:26,064 INFO L226 Difference]: Without dead ends: 55266 [2020-12-22 13:15:26,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:15:26,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55266 states. [2020-12-22 13:15:27,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55266 to 29588. [2020-12-22 13:15:27,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29588 states. [2020-12-22 13:15:27,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29588 states to 29588 states and 39374 transitions. [2020-12-22 13:15:27,982 INFO L78 Accepts]: Start accepts. Automaton has 29588 states and 39374 transitions. Word has length 65 [2020-12-22 13:15:27,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:15:27,984 INFO L481 AbstractCegarLoop]: Abstraction has 29588 states and 39374 transitions. [2020-12-22 13:15:27,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:15:27,984 INFO L276 IsEmpty]: Start isEmpty. Operand 29588 states and 39374 transitions. [2020-12-22 13:15:27,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 13:15:27,996 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:15:27,996 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 13:15:27,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 13:15:27,996 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:15:27,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:15:27,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1636642589, now seen corresponding path program 1 times [2020-12-22 13:15:27,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:15:27,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728827390] [2020-12-22 13:15:27,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:15:28,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:28,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 13:15:28,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728827390] [2020-12-22 13:15:28,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:15:28,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:15:28,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767133784] [2020-12-22 13:15:28,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:15:28,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:15:28,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:15:28,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:15:28,146 INFO L87 Difference]: Start difference. First operand 29588 states and 39374 transitions. Second operand 4 states. [2020-12-22 13:15:31,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:15:31,632 INFO L93 Difference]: Finished difference Result 138764 states and 184450 transitions. [2020-12-22 13:15:31,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:15:31,633 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-12-22 13:15:31,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:15:31,960 INFO L225 Difference]: With dead ends: 138764 [2020-12-22 13:15:31,960 INFO L226 Difference]: Without dead ends: 109194 [2020-12-22 13:15:32,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:15:32,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109194 states. [2020-12-22 13:15:34,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109194 to 57888. [2020-12-22 13:15:34,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57888 states. [2020-12-22 13:15:34,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57888 states to 57888 states and 76958 transitions. [2020-12-22 13:15:34,880 INFO L78 Accepts]: Start accepts. Automaton has 57888 states and 76958 transitions. Word has length 66 [2020-12-22 13:15:34,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:15:34,881 INFO L481 AbstractCegarLoop]: Abstraction has 57888 states and 76958 transitions. [2020-12-22 13:15:34,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:15:34,881 INFO L276 IsEmpty]: Start isEmpty. Operand 57888 states and 76958 transitions. [2020-12-22 13:15:34,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 13:15:34,891 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:15:34,891 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-12-22 13:15:34,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 13:15:34,892 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:15:34,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:15:34,892 INFO L82 PathProgramCache]: Analyzing trace with hash 929253526, now seen corresponding path program 1 times [2020-12-22 13:15:34,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:15:34,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074775994] [2020-12-22 13:15:34,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:15:34,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:35,002 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 13:15:35,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074775994] [2020-12-22 13:15:35,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:15:35,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:15:35,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421949554] [2020-12-22 13:15:35,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:15:35,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:15:35,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:15:35,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:15:35,004 INFO L87 Difference]: Start difference. First operand 57888 states and 76958 transitions. Second operand 5 states. [2020-12-22 13:15:40,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:15:40,305 INFO L93 Difference]: Finished difference Result 196872 states and 261570 transitions. [2020-12-22 13:15:40,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 13:15:40,306 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-12-22 13:15:40,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:15:40,608 INFO L225 Difference]: With dead ends: 196872 [2020-12-22 13:15:40,609 INFO L226 Difference]: Without dead ends: 139002 [2020-12-22 13:15:40,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:15:41,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139002 states. [2020-12-22 13:15:44,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139002 to 58048. [2020-12-22 13:15:44,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58048 states. [2020-12-22 13:15:44,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58048 states to 58048 states and 77118 transitions. [2020-12-22 13:15:44,136 INFO L78 Accepts]: Start accepts. Automaton has 58048 states and 77118 transitions. Word has length 70 [2020-12-22 13:15:44,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:15:44,136 INFO L481 AbstractCegarLoop]: Abstraction has 58048 states and 77118 transitions. [2020-12-22 13:15:44,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:15:44,137 INFO L276 IsEmpty]: Start isEmpty. Operand 58048 states and 77118 transitions. [2020-12-22 13:15:44,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 13:15:44,145 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:15:44,156 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:15:44,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 13:15:44,156 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:15:44,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:15:44,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1915905124, now seen corresponding path program 1 times [2020-12-22 13:15:44,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:15:44,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748811443] [2020-12-22 13:15:44,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:15:44,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:44,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 13:15:44,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748811443] [2020-12-22 13:15:44,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:15:44,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:15:44,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278835432] [2020-12-22 13:15:44,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:15:44,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:15:44,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:15:44,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:15:44,284 INFO L87 Difference]: Start difference. First operand 58048 states and 77118 transitions. Second operand 3 states. [2020-12-22 13:15:47,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:15:47,948 INFO L93 Difference]: Finished difference Result 137700 states and 183004 transitions. [2020-12-22 13:15:47,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:15:47,949 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 13:15:47,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:15:48,117 INFO L225 Difference]: With dead ends: 137700 [2020-12-22 13:15:48,117 INFO L226 Difference]: Without dead ends: 79670 [2020-12-22 13:15:48,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:15:48,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79670 states. [2020-12-22 13:15:51,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79670 to 68528. [2020-12-22 13:15:51,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68528 states. [2020-12-22 13:15:51,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68528 states to 68528 states and 91438 transitions. [2020-12-22 13:15:51,666 INFO L78 Accepts]: Start accepts. Automaton has 68528 states and 91438 transitions. Word has length 74 [2020-12-22 13:15:51,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:15:51,666 INFO L481 AbstractCegarLoop]: Abstraction has 68528 states and 91438 transitions. [2020-12-22 13:15:51,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:15:51,667 INFO L276 IsEmpty]: Start isEmpty. Operand 68528 states and 91438 transitions. [2020-12-22 13:15:51,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-12-22 13:15:51,676 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:15:51,676 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:15:51,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 13:15:51,676 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:15:51,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:15:51,677 INFO L82 PathProgramCache]: Analyzing trace with hash -2119199959, now seen corresponding path program 1 times [2020-12-22 13:15:51,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:15:51,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376369606] [2020-12-22 13:15:51,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:15:51,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:51,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:15:51,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376369606] [2020-12-22 13:15:51,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:15:51,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:15:51,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366219917] [2020-12-22 13:15:51,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:15:51,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:15:51,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:15:51,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:15:51,876 INFO L87 Difference]: Start difference. First operand 68528 states and 91438 transitions. Second operand 3 states. [2020-12-22 13:15:56,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:15:56,658 INFO L93 Difference]: Finished difference Result 181548 states and 243328 transitions. [2020-12-22 13:15:56,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:15:56,659 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 220 [2020-12-22 13:15:56,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:15:56,837 INFO L225 Difference]: With dead ends: 181548 [2020-12-22 13:15:56,838 INFO L226 Difference]: Without dead ends: 113038 [2020-12-22 13:15:56,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:15:57,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113038 states. [2020-12-22 13:16:01,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113038 to 113032. [2020-12-22 13:16:01,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113032 states. [2020-12-22 13:16:01,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113032 states to 113032 states and 151778 transitions. [2020-12-22 13:16:01,785 INFO L78 Accepts]: Start accepts. Automaton has 113032 states and 151778 transitions. Word has length 220 [2020-12-22 13:16:01,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:16:01,786 INFO L481 AbstractCegarLoop]: Abstraction has 113032 states and 151778 transitions. [2020-12-22 13:16:01,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:16:01,786 INFO L276 IsEmpty]: Start isEmpty. Operand 113032 states and 151778 transitions. [2020-12-22 13:16:02,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-12-22 13:16:02,003 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:16:02,006 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:16:02,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 13:16:02,007 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:16:02,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:16:02,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1774173655, now seen corresponding path program 1 times [2020-12-22 13:16:02,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:16:02,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834021649] [2020-12-22 13:16:02,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:16:02,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:02,276 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 13:16:02,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834021649] [2020-12-22 13:16:02,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:16:02,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:16:02,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194182067] [2020-12-22 13:16:02,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:16:02,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:16:02,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:16:02,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:16:02,279 INFO L87 Difference]: Start difference. First operand 113032 states and 151778 transitions. Second operand 3 states. [2020-12-22 13:16:07,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:16:07,771 INFO L93 Difference]: Finished difference Result 226430 states and 304303 transitions. [2020-12-22 13:16:07,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:16:07,771 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 229 [2020-12-22 13:16:07,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:16:07,940 INFO L225 Difference]: With dead ends: 226430 [2020-12-22 13:16:07,941 INFO L226 Difference]: Without dead ends: 113416 [2020-12-22 13:16:08,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:16:08,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113416 states. [2020-12-22 13:16:12,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113416 to 113416. [2020-12-22 13:16:12,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113416 states. [2020-12-22 13:16:12,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113416 states to 113416 states and 152162 transitions. [2020-12-22 13:16:12,947 INFO L78 Accepts]: Start accepts. Automaton has 113416 states and 152162 transitions. Word has length 229 [2020-12-22 13:16:12,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:16:12,948 INFO L481 AbstractCegarLoop]: Abstraction has 113416 states and 152162 transitions. [2020-12-22 13:16:12,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:16:12,948 INFO L276 IsEmpty]: Start isEmpty. Operand 113416 states and 152162 transitions. [2020-12-22 13:16:12,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-12-22 13:16:12,958 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:16:12,959 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:16:12,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 13:16:12,959 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:16:12,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:16:12,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1172660071, now seen corresponding path program 1 times [2020-12-22 13:16:12,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:16:12,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877531088] [2020-12-22 13:16:12,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:16:13,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:13,469 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 13:16:13,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877531088] [2020-12-22 13:16:13,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:16:13,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:16:13,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916613589] [2020-12-22 13:16:13,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:16:13,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:16:13,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:16:13,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:16:13,474 INFO L87 Difference]: Start difference. First operand 113416 states and 152162 transitions. Second operand 3 states. [2020-12-22 13:16:22,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:16:22,557 INFO L93 Difference]: Finished difference Result 340020 states and 456188 transitions. [2020-12-22 13:16:22,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:16:22,557 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 229 [2020-12-22 13:16:22,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:16:23,120 INFO L225 Difference]: With dead ends: 340020 [2020-12-22 13:16:23,121 INFO L226 Difference]: Without dead ends: 226622 [2020-12-22 13:16:23,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:16:23,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226622 states. [2020-12-22 13:16:29,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226622 to 113480. [2020-12-22 13:16:29,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113480 states. [2020-12-22 13:16:29,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113480 states to 113480 states and 152226 transitions. [2020-12-22 13:16:29,649 INFO L78 Accepts]: Start accepts. Automaton has 113480 states and 152226 transitions. Word has length 229 [2020-12-22 13:16:29,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:16:29,651 INFO L481 AbstractCegarLoop]: Abstraction has 113480 states and 152226 transitions. [2020-12-22 13:16:29,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:16:29,652 INFO L276 IsEmpty]: Start isEmpty. Operand 113480 states and 152226 transitions. [2020-12-22 13:16:29,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-12-22 13:16:29,663 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:16:29,664 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:16:29,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 13:16:29,664 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:16:29,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:16:29,665 INFO L82 PathProgramCache]: Analyzing trace with hash -191928734, now seen corresponding path program 1 times [2020-12-22 13:16:29,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:16:29,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262984752] [2020-12-22 13:16:29,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:16:29,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:29,905 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 13:16:29,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262984752] [2020-12-22 13:16:29,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:16:29,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:16:29,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368774446] [2020-12-22 13:16:29,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:16:29,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:16:29,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:16:29,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:16:29,908 INFO L87 Difference]: Start difference. First operand 113480 states and 152226 transitions. Second operand 3 states. [2020-12-22 13:16:40,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:16:40,361 INFO L93 Difference]: Finished difference Result 340212 states and 456380 transitions. [2020-12-22 13:16:40,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:16:40,361 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 234 [2020-12-22 13:16:40,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:16:40,787 INFO L225 Difference]: With dead ends: 340212 [2020-12-22 13:16:40,787 INFO L226 Difference]: Without dead ends: 226750 [2020-12-22 13:16:40,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:16:41,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226750 states. [2020-12-22 13:16:47,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226750 to 113544. [2020-12-22 13:16:47,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113544 states. [2020-12-22 13:16:47,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113544 states to 113544 states and 152290 transitions. [2020-12-22 13:16:47,809 INFO L78 Accepts]: Start accepts. Automaton has 113544 states and 152290 transitions. Word has length 234 [2020-12-22 13:16:47,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:16:47,810 INFO L481 AbstractCegarLoop]: Abstraction has 113544 states and 152290 transitions. [2020-12-22 13:16:47,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:16:47,816 INFO L276 IsEmpty]: Start isEmpty. Operand 113544 states and 152290 transitions. [2020-12-22 13:16:47,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-12-22 13:16:47,841 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:16:47,844 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:16:47,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 13:16:47,845 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:16:47,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:16:47,845 INFO L82 PathProgramCache]: Analyzing trace with hash -736924161, now seen corresponding path program 1 times [2020-12-22 13:16:47,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:16:47,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103495096] [2020-12-22 13:16:47,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:16:47,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:48,086 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 13:16:48,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103495096] [2020-12-22 13:16:48,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:16:48,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:16:48,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281009968] [2020-12-22 13:16:48,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:16:48,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:16:48,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:16:48,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:16:48,088 INFO L87 Difference]: Start difference. First operand 113544 states and 152290 transitions. Second operand 3 states. [2020-12-22 13:16:59,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:16:59,532 INFO L93 Difference]: Finished difference Result 340404 states and 456636 transitions. [2020-12-22 13:16:59,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:16:59,534 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 239 [2020-12-22 13:16:59,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:17:00,064 INFO L225 Difference]: With dead ends: 340404 [2020-12-22 13:17:00,064 INFO L226 Difference]: Without dead ends: 226878 [2020-12-22 13:17:00,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:17:00,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226878 states. [2020-12-22 13:17:07,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226878 to 113608. [2020-12-22 13:17:07,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113608 states. [2020-12-22 13:17:07,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113608 states to 113608 states and 152354 transitions. [2020-12-22 13:17:07,529 INFO L78 Accepts]: Start accepts. Automaton has 113608 states and 152354 transitions. Word has length 239 [2020-12-22 13:17:07,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:17:07,530 INFO L481 AbstractCegarLoop]: Abstraction has 113608 states and 152354 transitions. [2020-12-22 13:17:07,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:17:07,530 INFO L276 IsEmpty]: Start isEmpty. Operand 113608 states and 152354 transitions. [2020-12-22 13:17:07,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-12-22 13:17:07,539 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:17:07,539 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:17:07,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 13:17:07,542 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:17:07,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:17:07,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1371869545, now seen corresponding path program 1 times [2020-12-22 13:17:07,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:17:07,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027837437] [2020-12-22 13:17:07,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:17:07,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:17:07,815 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 13:17:07,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027837437] [2020-12-22 13:17:07,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:17:07,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:17:07,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657258651] [2020-12-22 13:17:07,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:17:07,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:17:07,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:17:07,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:17:07,818 INFO L87 Difference]: Start difference. First operand 113608 states and 152354 transitions. Second operand 3 states. [2020-12-22 13:17:16,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:17:16,068 INFO L93 Difference]: Finished difference Result 227710 states and 305711 transitions. [2020-12-22 13:17:16,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:17:16,068 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 250 [2020-12-22 13:17:16,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:17:16,350 INFO L225 Difference]: With dead ends: 227710 [2020-12-22 13:17:16,351 INFO L226 Difference]: Without dead ends: 114120 [2020-12-22 13:17:16,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:17:16,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114120 states. [2020-12-22 13:17:23,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114120 to 114120. [2020-12-22 13:17:23,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114120 states. [2020-12-22 13:17:23,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114120 states to 114120 states and 152866 transitions. [2020-12-22 13:17:23,388 INFO L78 Accepts]: Start accepts. Automaton has 114120 states and 152866 transitions. Word has length 250 [2020-12-22 13:17:23,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:17:23,388 INFO L481 AbstractCegarLoop]: Abstraction has 114120 states and 152866 transitions. [2020-12-22 13:17:23,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:17:23,388 INFO L276 IsEmpty]: Start isEmpty. Operand 114120 states and 152866 transitions. [2020-12-22 13:17:23,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-12-22 13:17:23,396 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:17:23,396 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:17:23,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 13:17:23,397 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:17:23,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:17:23,397 INFO L82 PathProgramCache]: Analyzing trace with hash -803002519, now seen corresponding path program 1 times [2020-12-22 13:17:23,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:17:23,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108354112] [2020-12-22 13:17:23,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:17:23,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:17:23,666 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 13:17:23,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108354112] [2020-12-22 13:17:23,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:17:23,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:17:23,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390954895] [2020-12-22 13:17:23,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:17:23,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:17:23,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:17:23,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:17:23,669 INFO L87 Difference]: Start difference. First operand 114120 states and 152866 transitions. Second operand 3 states. [2020-12-22 13:17:31,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:17:31,446 INFO L93 Difference]: Finished difference Result 230270 states and 308783 transitions. [2020-12-22 13:17:31,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:17:31,447 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 254 [2020-12-22 13:17:31,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:17:31,640 INFO L225 Difference]: With dead ends: 230270 [2020-12-22 13:17:31,640 INFO L226 Difference]: Without dead ends: 116168 [2020-12-22 13:17:31,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:17:31,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116168 states. [2020-12-22 13:17:38,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116168 to 115656. [2020-12-22 13:17:38,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115656 states. [2020-12-22 13:17:38,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115656 states to 115656 states and 154402 transitions. [2020-12-22 13:17:38,597 INFO L78 Accepts]: Start accepts. Automaton has 115656 states and 154402 transitions. Word has length 254 [2020-12-22 13:17:38,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:17:38,597 INFO L481 AbstractCegarLoop]: Abstraction has 115656 states and 154402 transitions. [2020-12-22 13:17:38,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:17:38,597 INFO L276 IsEmpty]: Start isEmpty. Operand 115656 states and 154402 transitions. [2020-12-22 13:17:38,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-12-22 13:17:38,605 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:17:38,606 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:17:38,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 13:17:38,606 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:17:38,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:17:38,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1199610391, now seen corresponding path program 1 times [2020-12-22 13:17:38,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:17:38,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338134993] [2020-12-22 13:17:38,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:17:38,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:17:38,901 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 13:17:38,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338134993] [2020-12-22 13:17:38,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334387393] [2020-12-22 13:17:38,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:17:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:17:40,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 3299 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 13:17:40,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:17:40,739 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-22 13:17:40,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:17:40,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-22 13:17:40,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460270947] [2020-12-22 13:17:40,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:17:40,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:17:40,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:17:40,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:17:40,742 INFO L87 Difference]: Start difference. First operand 115656 states and 154402 transitions. Second operand 3 states. [2020-12-22 13:17:49,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:17:49,787 INFO L93 Difference]: Finished difference Result 268606 states and 359471 transitions. [2020-12-22 13:17:49,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:17:49,790 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 270 [2020-12-22 13:17:49,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:17:50,052 INFO L225 Difference]: With dead ends: 268606 [2020-12-22 13:17:50,052 INFO L226 Difference]: Without dead ends: 152968 [2020-12-22 13:17:50,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:17:50,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152968 states. [2020-12-22 13:17:57,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152968 to 117064. [2020-12-22 13:17:57,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117064 states. [2020-12-22 13:17:57,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117064 states to 117064 states and 155810 transitions. [2020-12-22 13:17:57,663 INFO L78 Accepts]: Start accepts. Automaton has 117064 states and 155810 transitions. Word has length 270 [2020-12-22 13:17:57,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:17:57,663 INFO L481 AbstractCegarLoop]: Abstraction has 117064 states and 155810 transitions. [2020-12-22 13:17:57,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:17:57,663 INFO L276 IsEmpty]: Start isEmpty. Operand 117064 states and 155810 transitions. [2020-12-22 13:17:57,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2020-12-22 13:17:57,671 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:17:57,671 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:17:57,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 13:17:57,874 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:17:57,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:17:57,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1088979410, now seen corresponding path program 1 times [2020-12-22 13:17:57,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:17:57,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580580467] [2020-12-22 13:17:57,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:17:57,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:17:58,402 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 13:17:58,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580580467] [2020-12-22 13:17:58,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781238000] [2020-12-22 13:17:58,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:17:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:17:59,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 3331 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 13:17:59,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:17:59,887 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 13:17:59,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:17:59,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-22 13:17:59,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938370774] [2020-12-22 13:17:59,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 13:17:59,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:17:59,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 13:17:59,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:17:59,890 INFO L87 Difference]: Start difference. First operand 117064 states and 155810 transitions. Second operand 6 states. [2020-12-22 13:18:08,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:18:08,449 INFO L93 Difference]: Finished difference Result 237438 states and 316719 transitions. [2020-12-22 13:18:08,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 13:18:08,449 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 274 [2020-12-22 13:18:08,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:18:08,877 INFO L225 Difference]: With dead ends: 237438 [2020-12-22 13:18:08,878 INFO L226 Difference]: Without dead ends: 120392 [2020-12-22 13:18:09,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:18:09,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120392 states. [2020-12-22 13:18:16,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120392 to 119880. [2020-12-22 13:18:16,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119880 states. [2020-12-22 13:18:17,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119880 states to 119880 states and 158626 transitions. [2020-12-22 13:18:17,290 INFO L78 Accepts]: Start accepts. Automaton has 119880 states and 158626 transitions. Word has length 274 [2020-12-22 13:18:17,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:18:17,290 INFO L481 AbstractCegarLoop]: Abstraction has 119880 states and 158626 transitions. [2020-12-22 13:18:17,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 13:18:17,291 INFO L276 IsEmpty]: Start isEmpty. Operand 119880 states and 158626 transitions. [2020-12-22 13:18:17,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2020-12-22 13:18:17,333 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:18:17,334 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:18:17,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 13:18:17,549 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:18:17,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:18:17,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1843633810, now seen corresponding path program 2 times [2020-12-22 13:18:17,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:18:17,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443208082] [2020-12-22 13:18:17,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:18:17,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:18:17,894 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-12-22 13:18:17,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443208082] [2020-12-22 13:18:17,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:18:17,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:18:17,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923499405] [2020-12-22 13:18:17,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:18:17,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:18:17,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:18:17,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:18:17,902 INFO L87 Difference]: Start difference. First operand 119880 states and 158626 transitions. Second operand 4 states. [2020-12-22 13:18:26,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:18:26,462 INFO L93 Difference]: Finished difference Result 240766 states and 318767 transitions. [2020-12-22 13:18:26,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:18:26,462 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 294 [2020-12-22 13:18:26,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:18:26,709 INFO L225 Difference]: With dead ends: 240766 [2020-12-22 13:18:26,710 INFO L226 Difference]: Without dead ends: 120904 [2020-12-22 13:18:27,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:18:27,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120904 states. [2020-12-22 13:18:34,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120904 to 120904. [2020-12-22 13:18:34,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120904 states. [2020-12-22 13:18:35,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120904 states to 120904 states and 159650 transitions. [2020-12-22 13:18:35,133 INFO L78 Accepts]: Start accepts. Automaton has 120904 states and 159650 transitions. Word has length 294 [2020-12-22 13:18:35,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:18:35,134 INFO L481 AbstractCegarLoop]: Abstraction has 120904 states and 159650 transitions. [2020-12-22 13:18:35,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:18:35,134 INFO L276 IsEmpty]: Start isEmpty. Operand 120904 states and 159650 transitions. [2020-12-22 13:18:35,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2020-12-22 13:18:35,142 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:18:35,143 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:18:35,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 13:18:35,143 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:18:35,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:18:35,144 INFO L82 PathProgramCache]: Analyzing trace with hash 673233874, now seen corresponding path program 1 times [2020-12-22 13:18:35,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:18:35,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973356322] [2020-12-22 13:18:35,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:18:35,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:18:35,584 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-12-22 13:18:35,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973356322] [2020-12-22 13:18:35,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:18:35,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:18:35,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880463807] [2020-12-22 13:18:35,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:18:35,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:18:35,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:18:35,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:18:35,588 INFO L87 Difference]: Start difference. First operand 120904 states and 159650 transitions. Second operand 4 states.